{"id":270,"date":"2025-03-24T08:54:56","date_gmt":"2025-03-23T23:54:56","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=270"},"modified":"2025-03-24T08:54:56","modified_gmt":"2025-03-23T23:54:56","slug":"spring-framework-autowired%e3%81%ae%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a%e5%9f%ba%e7%a4%8e%e3%81%8b%e3%82%89%e5%bf%9c%e7%94%a8%e3%81%be%e3%81%a710%e3%81%ae%e3%83%99%e3%82%b9%e3%83%88","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=270","title":{"rendered":"Spring Framework @Autowired\u306e\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u306710\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">1. @Autowired\u3068\u306f\uff1fSpring Framework\u306b\u304a\u3051\u308b\u5f79\u5272\u3068\u91cd\u8981\u6027<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">1.1 Dependency Injection\u306e\u57fa\u672c\u6982\u5ff5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">1.2 @Autowired\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u767b\u5834\u80cc\u666f<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">2. @Autowired\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">2.1 \u30d5\u30a3\u30fc\u30eb\u30c9\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\uff1a\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-5\">2.2 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\uff1a\u63a8\u5968\u3055\u308c\u308b\u7406\u7531<\/a>      <\/li>      <li>        <a href=\"#i-6\">2.3 \u30bb\u30c3\u30bf\u30fc\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\uff1a\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">@Autowired\u306e\u4f7f\u7528\u306b\u95a2\u3059\u308b\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">3. @Autowired\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e10\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">3.1 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u3092\u512a\u5148\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-10\">3.2 \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3078\u306e\u4f9d\u5b58\u3092\u6d3b\u7528\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-11\">3.3 \u5faa\u74b0\u4f9d\u5b58\u3092\u907f\u3051\u308b\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-12\">3.4 @Qualifier\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-13\">3.5 \u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u8003\u616e\u3057\u305fDI\u8a2d\u8a08<\/a>      <\/li>      <li>        <a href=\"#i-14\">3.6 \u9069\u5207\u306a\u30b9\u30b3\u30fc\u30d7\u306e\u9078\u629e<\/a>      <\/li>      <li>        <a href=\"#i-15\">3.7 \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30b9\u30ad\u30e3\u30f3\u306e\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-16\">3.8 @Autowired\u306e\u4f7f\u7528\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b<\/a>      <\/li>      <li>        <a href=\"#i-17\">3.9 @Primary\u306e\u6d3b\u7528<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">3.10 \u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30e1\u30bd\u30c3\u30c9\u306e\u9069\u5207\u306a\u4f7f\u7528<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-19\">4. @Autowired\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-20\">4.1 \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3078\u306e\u6ce8\u5165\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-21\">4.2 \u6761\u4ef6\u4ed8\u304d\u81ea\u52d5\u6ce8\u5165\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-22\">4.3 \u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u7528\u3044\u305f\u67d4\u8edf\u306aDI<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-23\">5. @Autowired\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-24\">5.1 \u8d77\u52d5\u6642\u9593\u3078\u306e\u5f71\u97ff\u3068\u6700\u9069\u5316\u6226\u7565<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-25\">5.2 \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u8003\u5bdf\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-26\">6. @Autowired\u306e\u4ee3\u66ff\u624b\u6cd5\u3068\u6bd4\u8f03<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-27\">6.1 JavaConfig\u3092\u7528\u3044\u305f\u660e\u793a\u7684DI<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-28\">6.2 @Resource\u3068@Inject\u306e\u4f7f\u7528\u30b7\u30fc\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-29\">7. \u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3051\u308b@Autowired\u306e\u904b\u7528\u30ce\u30a6\u30cf\u30a6<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-30\">7.1 \u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u4f9d\u5b58\u95a2\u4fc2\u7ba1\u7406\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-31\">7.2 \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u3092\u8003\u616e\u3057\u305fDI\u8a2d\u8a08<\/a>      <\/li>      <li>        <a href=\"#i-32\">\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e@Autowired\u4f7f\u7528\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-33\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u6700\u9069\u5316<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-34\">8. @Autowired\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74\u3068\u56de\u907f\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first last\">        <a href=\"#i-35\">8.1 NullPointerException\u306e\u539f\u56e0\u3068\u5bfe\u7b56<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-36\">\u5bfe\u7b56\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first last\">        <a href=\"#i-37\">8.2 \u30c6\u30b9\u30c8\u306b\u304a\u3051\u308b\u30e2\u30c3\u30af\u5316\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-38\">\u5bfe\u7b56\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-39\">\u305d\u306e\u4ed6\u306e\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-40\">@Autowired\u3092\u5b89\u5168\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-41\">9. Spring Framework 6.0\u4ee5\u964d\u306e@Autowired\uff1a\u65b0\u6a5f\u80fd\u3068\u5909\u66f4\u70b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-42\">9.1 null\u5b89\u5168\u6027\u306e\u5411\u4e0a\u3068\u30aa\u30d7\u30b7\u30e7\u30ca\u30eb\u6ce8\u5165<\/a>      <\/li>      <li>        <a href=\"#i-43\">9.2 AOT\u30b3\u30f3\u30d4\u30ec\u30fc\u30b7\u30e7\u30f3\u3078\u306e\u5bfe\u5fdc\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-44\">\u305d\u306e\u4ed6\u306e\u91cd\u8981\u306a\u5909\u66f4\u70b9<\/a>      <\/li>      <li>        <a href=\"#i-45\">\u65e2\u5b58\u30b3\u30fc\u30c9\u3078\u306e\u5f71\u97ff\u3068\u79fb\u884c\u6226\u7565<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-46\">\u5c06\u6765\u306e\u5c55\u671b<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-47\">10. \u307e\u3068\u3081\uff1a@Autowired\u306e\u52b9\u679c\u7684\u306a\u6d3b\u7528\u3068\u4eca\u5f8c\u306e\u5c55\u671b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-48\">10.1 @Autowired\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306e\u30ad\u30fc\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-49\">10.2 Spring Framework\u306e\u9032\u5316\u3068@Autowired\u306e\u5c06\u6765<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">1. @Autowired\u3068\u306f\uff1fSpring Framework\u306b\u304a\u3051\u308b\u5f79\u5272\u3068\u91cd\u8981\u6027<\/h2>\n\n\n\n<p>@Autowired\u306f\u3001Spring Framework\u304c\u63d0\u4f9b\u3059\u308b\u5f37\u529b\u306a\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e1\u3064\u3067\u3059\u3002\u3053\u306e\u5c0f\u3055\u306a@\u30de\u30fc\u30af\u3067\u59cb\u307e\u308b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u3001Spring\u958b\u767a\u8005\u306e\u65e5\u5e38\u696d\u52d9\u306b\u9769\u547d\u3092\u3082\u305f\u3089\u3057\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u672c\u8cea\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u307e\u305a\u4f9d\u5b58\u6027\u6ce8\u5165\uff08Dependency Injection\u3001DI\uff09\u3068\u3044\u3046\u6982\u5ff5\u3092\u628a\u63e1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">1.1 Dependency Injection\u306e\u57fa\u672c\u6982\u5ff5<\/h3>\n\n\n\n<p>\u4f9d\u5b58\u6027\u6ce8\u5165\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u91cd\u8981\u306a\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u3001\u30af\u30e9\u30b9\u304c\u5fc5\u8981\u3068\u3059\u308b\u4f9d\u5b58\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5916\u90e8\u304b\u3089\u300c\u6ce8\u5165\u300d\u3059\u308b\u3053\u3068\u3067\u3001\u30af\u30e9\u30b9\u9593\u306e\u7d50\u5408\u5ea6\u3092\u4f4e\u304f\u4fdd\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserService {\n    private UserRepository userRepository = new UserRepository();\n\n    public User getUser(Long id) {\n        return userRepository.findById(id);\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001<code>UserService<\/code>\u304c<code>UserRepository<\/code>\u306b\u5f37\u304f\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002\u4f9d\u5b58\u6027\u6ce8\u5165\u3092\u7528\u3044\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserService {\n    private UserRepository userRepository;\n\n    public UserService(UserRepository userRepository) {\n        this.userRepository = userRepository;\n    }\n\n    public User getUser(Long id) {\n        return userRepository.findById(id);\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u65b9\u6cd5\u306b\u3088\u308a\u3001<code>UserService<\/code>\u306f\u5177\u4f53\u7684\u306a<code>UserRepository<\/code>\u306e\u5b9f\u88c5\u306b\u4f9d\u5b58\u305b\u305a\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u4f9d\u5b58\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u67d4\u8edf\u6027\u3068\u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">1.2 @Autowired\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u767b\u5834\u80cc\u666f<\/h3>\n\n\n\n<p>Spring Framework 2.5\u3067\u5c0e\u5165\u3055\u308c\u305f@Autowired\u306f\u3001\u3053\u306e\u4f9d\u5b58\u6027\u6ce8\u5165\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u5927\u5e45\u306b\u7c21\u7d20\u5316\u3057\u307e\u3057\u305f\u3002\u305d\u308c\u307e\u3067\u306eXML\u30d9\u30fc\u30b9\u306e\u8a2d\u5b9a\u306f\u3001\u5927\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u7ba1\u7406\u304c\u56f0\u96e3\u306b\u306a\u308b\u50be\u5411\u304c\u3042\u308a\u307e\u3057\u305f\u3002@Autowired\u306e\u767b\u5834\u306b\u3088\u308a\u3001\u958b\u767a\u8005\u306fJava\u30b3\u30fc\u30c9\u5185\u3067\u76f4\u63a5\u4f9d\u5b58\u95a2\u4fc2\u3092\u5ba3\u8a00\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u8a2d\u5b9a\u306e\u8907\u96d1\u3055\u304c\u8efd\u6e1b\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>@Autowired\u306e\u4e3b\u306a\u5f79\u5272\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u4e3b\u306a\u5f79\u5272<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\">\n<li>\u81ea\u52d5\u914d\u7dda\uff1aSpring IoC\uff08Inversion of Control\uff09\u30b3\u30f3\u30c6\u30ca\u306b\u767b\u9332\u3055\u308c\u305fBean\u3092\u81ea\u52d5\u7684\u306b\u6ce8\u5165\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u8a2d\u5b9a\u306e\u7c21\u7d20\u5316\uff1aXML\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u660e\u793a\u7684\u306a\u4f9d\u5b58\u95a2\u4fc2\u306e\u5ba3\u8a00\u3092\u6e1b\u3089\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30bf\u30a4\u30d7\u30bb\u30fc\u30d5\uff1a\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u4f9d\u5b58\u95a2\u4fc2\u306e\u554f\u984c\u3092\u691c\u51fa\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>@Autowired\u306e\u4f7f\u7528\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserService {\n    @Autowired\n    private UserRepository userRepository;\n\n    public User getUser(Long id) {\n        return userRepository.findById(id);\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001Spring IoC \u30b3\u30f3\u30c6\u30ca\u304c\u81ea\u52d5\u7684\u306b\u9069\u5207\u306a<code>UserRepository<\/code>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092<code>userRepository<\/code>\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u6ce8\u5165\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>@Autowired\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001Spring\u958b\u767a\u8005\u306f\u4ee5\u4e0b\u306e\u30e1\u30ea\u30c3\u30c8\u3092\u4eab\u53d7\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u7c21\u7d20\u5316\uff1a\u4f9d\u5b58\u95a2\u4fc2\u306e\u5ba3\u8a00\u304c\u7c21\u6f54\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n\n\n\n<li>\u958b\u767a\u52b9\u7387\u306e\u5411\u4e0a\uff1a\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u7ba1\u7406\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n\n\n\n<li>\u67d4\u8edf\u6027\u306e\u5411\u4e0a\uff1a\u4f9d\u5b58\u3059\u308b\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u3092\u5bb9\u6613\u306b\u5909\u66f4\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<p>\u4e00\u65b9\u3067\u3001@Autowired\u306e\u904e\u5ea6\u306e\u4f7f\u7528\u306f\u4ee5\u4e0b\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u3092\u3082\u305f\u3089\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#ffebeb;color:#f88080\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#f88080\"><i class=\"fas fa-exclamation\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u4f4e\u4e0b\uff1a\u4f9d\u5b58\u95a2\u4fc2\u304c\u6697\u9ed9\u7684\u306b\u306a\u308a\u3001\u7406\u89e3\u304c\u96e3\u3057\u304f\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u306e\u8907\u96d1\u5316\uff1a\u7279\u306b\u30d5\u30a3\u30fc\u30eb\u30c9\u6ce8\u5165\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u5358\u4f53\u30c6\u30b9\u30c8\u304c\u96e3\u3057\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<p>@Autowired\u306f\u3001Spring Framework\u306e\u4e2d\u6838\u7684\u306a\u6a5f\u80fd\u306e1\u3064\u3068\u3057\u3066\u3001\u4f9d\u5b58\u6027\u6ce8\u5165\u3092\u7c21\u7d20\u5316\u3057\u3001\u958b\u767a\u8005\u306e\u751f\u7523\u6027\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u307e\u3057\u305f\u3002\u305f\u3060\u3057\u3001\u305d\u306e\u4f7f\u7528\u306b\u306f\u9069\u5207\u306a\u7406\u89e3\u3068\u5224\u65ad\u304c\u5fc5\u8981\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001@Autowired\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">2. @Autowired\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<p>Spring Framework\u306b\u304a\u3051\u308b@Autowired\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u4e3b\u306b3\u3064\u306e\u65b9\u6cd5\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u65b9\u6cd5\u306b\u306f\u7279\u5fb4\u304c\u3042\u308a\u3001\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5404\u65b9\u6cd5\u306e\u8a73\u7d30\u3068\u3001\u305d\u308c\u305e\u308c\u306e\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">2.1 \u30d5\u30a3\u30fc\u30eb\u30c9\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\uff1a\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<p>\u30d5\u30a3\u30fc\u30eb\u30c9\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306f\u3001@Autowired\u3092\u76f4\u63a5\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u4ed8\u4e0e\u3059\u308b\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Component\npublic class UserService {\n    @Autowired\n    private UserRepository userRepository;\n\n    public User getUser(Long id) {\n        return userRepository.findById(id);\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u304c\u7c21\u6f54\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u8a2d\u5b9a\u304c\u7c21\u5358<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#ffebeb;color:#f88080\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#f88080\"><i class=\"fas fa-exclamation\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u5358\u4f53\u30c6\u30b9\u30c8\u304c\u56f0\u96e3\uff08Mock\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6ce8\u5165\u304c\u96e3\u3057\u3044\uff09<\/li>\n\n\n\n<li>\u5faa\u74b0\u4f9d\u5b58\u306e\u691c\u51fa\u304c\u56f0\u96e3<\/li>\n\n\n\n<li>\u4e0d\u5909\u6027\u3092\u4fdd\u8a3c\u3067\u304d\u306a\u3044<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<p>\u30d5\u30a3\u30fc\u30eb\u30c9\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306f\u7c21\u5358\u3067\u3059\u304c\u3001\u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3084\u4fdd\u5b88\u6027\u306e\u89b3\u70b9\u304b\u3089\u3001\u73fe\u5728\u306f\u3042\u307e\u308a\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">2.2 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\uff1a\u63a8\u5968\u3055\u308c\u308b\u7406\u7531<\/h3>\n\n\n\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306f\u3001\u4f9d\u5b58\u95a2\u4fc2\u3092\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Component\npublic class UserService {\n    private final UserRepository userRepository;\n\n    @Autowired \/\/ Spring 4.3\u4ee5\u964d\u3001\u5358\u4e00\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5834\u5408\u306f\u7701\u7565\u53ef\u80fd\n    public UserService(UserRepository userRepository) {\n        this.userRepository = userRepository;\n    }\n\n    public User getUser(Long id) {\n        return userRepository.findById(id);\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u4e0d\u5909\u6027\u3092\u4fdd\u8a3c\u3067\u304d\u308b\uff08final\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u4f7f\u3048\u308b\uff09<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\uff08Mock\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6ce8\u5165\u304c\u7c21\u5358\uff09<\/li>\n\n\n\n<li>\u5faa\u74b0\u4f9d\u5b58\u3092\u691c\u51fa\u3057\u3084\u3059\u3044<\/li>\n\n\n\n<li>\u5fc5\u9808\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u660e\u793a\u7684\u306b\u793a\u305b\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#ffebeb;color:#f88080\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#f88080\"><i class=\"fas fa-exclamation\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u4f9d\u5b58\u95a2\u4fc2\u304c\u591a\u3044\u5834\u5408\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u9577\u304f\u306a\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306f\u3001\u73fe\u5728\u6700\u3082\u63a8\u5968\u3055\u308c\u308b\u65b9\u6cd5\u3067\u3059\u3002\u7279\u306b\u3001Spring Framework 4.3\u4ee5\u964d\u3067\u306f\u3001\u30af\u30e9\u30b9\u306b\u5358\u4e00\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3057\u304b\u306a\u3044\u5834\u5408\u3001@Autowired\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u7701\u7565\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">2.3 \u30bb\u30c3\u30bf\u30fc\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\uff1a\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n<p>\u30bb\u30c3\u30bf\u30fc\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306f\u3001\u30bb\u30c3\u30bf\u30fc\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u4f9d\u5b58\u95a2\u4fc2\u3092\u6ce8\u5165\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Component\npublic class UserService {\n    private UserRepository userRepository;\n\n    @Autowired\n    public void setUserRepository(UserRepository userRepository) {\n        this.userRepository = userRepository;\n    }\n\n    public User getUser(Long id) {\n        return userRepository.findById(id);\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u4f9d\u5b58\u95a2\u4fc2\u306b\u9069\u3057\u3066\u3044\u308b<\/li>\n\n\n\n<li>\u5b9f\u884c\u6642\u306b\u4f9d\u5b58\u95a2\u4fc2\u3092\u5909\u66f4\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u5faa\u74b0\u4f9d\u5b58\u306e\u89e3\u6c7a\u306b\u5f79\u7acb\u3064\u5834\u5408\u304c\u3042\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#ffebeb;color:#f88080\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#f88080\"><i class=\"fas fa-exclamation\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u4e0d\u5909\u6027\u3092\u4fdd\u8a3c\u3067\u304d\u306a\u3044<\/li>\n\n\n\n<li>NullPointerException\u306e\u30ea\u30b9\u30af\u304c\u3042\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<p>\u30bb\u30c3\u30bf\u30fc\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306f\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u4f9d\u5b58\u95a2\u4fc2\u3084\u3001\u5b9f\u884c\u6642\u306b\u4f9d\u5b58\u95a2\u4fc2\u3092\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">@Autowired\u306e\u4f7f\u7528\u306b\u95a2\u3059\u308b\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9069\u5207\u306a\u30b9\u30b3\u30fc\u30d7\u306e\u9078\u629e\uff1a<br>@Autowired\u3067\u6ce8\u5165\u3055\u308c\u308b\u30d3\u30fc\u30f3\u306e\u30b9\u30b3\u30fc\u30d7\uff08Singleton\u3001Prototype\u3001Request\u3001Session\u306a\u3069\uff09\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u8907\u6570\u306e\u5019\u88dc\u304c\u3042\u308b\u5834\u5408\uff1a<br>\u540c\u3058\u578b\u306e\u8907\u6570\u306e\u30d3\u30fc\u30f3\u304c\u3042\u308b\u5834\u5408\u3001@Qualifier\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u306e\u30d3\u30fc\u30f3\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Autowired\n   @Qualifier(\"primaryUserRepository\")\n   private UserRepository userRepository;<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30b9\u30ad\u30e3\u30f3\u306e\u8a2d\u5b9a\uff1a<br>@Component\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u4ed8\u4e0e\u3055\u308c\u305f\u30af\u30e9\u30b9\u3092\u81ea\u52d5\u7684\u306b\u691c\u51fa\u3057\u3001\u30d3\u30fc\u30f3\u3068\u3057\u3066\u767b\u9332\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u9069\u5207\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30b9\u30ad\u30e3\u30f3\u306e\u8a2d\u5b9a\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Configuration\n   @ComponentScan(basePackages = \"com.example.myapp\")\n   public class AppConfig {\n       \/\/ \u8a2d\u5b9a\u5185\u5bb9\n   }<\/pre>\n\n\n\n<p>@Autowired\u306e\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001Spring Framework\u306e\u4f9d\u5b58\u6027\u6ce8\u5165\u6a5f\u80fd\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3057\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001@Autowired\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">3. @Autowired\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e10\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<p>@Autowired\u306f\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001\u9069\u5207\u306b\u4f7f\u7528\u3057\u306a\u3044\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u54c1\u8cea\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001@Autowired\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e10\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">3.1 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u3092\u512a\u5148\u3059\u308b<\/h3>\n\n\n\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306f\u3001@Autowired\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6700\u3082\u63a8\u5968\u3055\u308c\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\npublic class UserService {\n    private final UserRepository userRepository;\n    private final EmailService emailService;\n\n    @Autowired \/\/ Spring 4.3\u4ee5\u964d\u3001\u5358\u4e00\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5834\u5408\u306f\u7701\u7565\u53ef\u80fd\n    public UserService(UserRepository userRepository, EmailService emailService) {\n        this.userRepository = userRepository;\n        this.emailService = emailService;\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u4e0d\u5909\u6027\u3092\u4fdd\u8a3c\u3067\u304d\u308b\uff08final\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u4f7f\u3048\u308b\uff09<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\uff08Mock\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6ce8\u5165\u304c\u7c21\u5358\uff09<\/li>\n\n\n\n<li>\u5faa\u74b0\u4f9d\u5b58\u3092\u691c\u51fa\u3057\u3084\u3059\u3044<\/li>\n\n\n\n<li>\u5fc5\u9808\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u660e\u793a\u7684\u306b\u793a\u305b\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">3.2 \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3078\u306e\u4f9d\u5b58\u3092\u6d3b\u7528\u3059\u308b<\/h3>\n\n\n\n<p>\u5177\u4f53\u7684\u306a\u30af\u30e9\u30b9\u3067\u306f\u306a\u304f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u67d4\u8edf\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\npublic class UserService {\n    private final UserRepository userRepository;\n\n    @Autowired\n    public UserService(UserRepository userRepository) {\n        this.userRepository = userRepository;\n    }\n}\n\npublic interface UserRepository {\n    User findById(Long id);\n}\n\n@Repository\npublic class JpaUserRepository implements UserRepository {\n    @Override\n    public User findById(Long id) {\n        \/\/ JPA\u5b9f\u88c5\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u5b9f\u88c5\u306e\u8a73\u7d30\u304b\u3089\u5206\u96e2\u3055\u308c\u308b\u305f\u3081\u3001\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u5c06\u6765\u7684\u306a\u5b9f\u88c5\u306e\u5909\u66f4\u304c\u5bb9\u6613\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u3092\u6d3b\u7528\u3067\u304d\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">3.3 \u5faa\u74b0\u4f9d\u5b58\u3092\u907f\u3051\u308b\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u5faa\u74b0\u4f9d\u5b58\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8d77\u52d5\u6642\u306b\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u907f\u3051\u308b\u305f\u3081\u306e\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5faa\u74b0\u4f9d\u5b58\u306e\u4f8b\n@Service\npublic class ServiceA {\n    @Autowired\n    private ServiceB serviceB;\n}\n\n@Service\npublic class ServiceB {\n    @Autowired\n    private ServiceA serviceA;\n}\n\n\/\/ \u89e3\u6c7a\u7b56\uff1a\u30d5\u30a1\u30b5\u30fc\u30c9\u30d1\u30bf\u30fc\u30f3\u306e\u4f7f\u7528\n@Service\npublic class ServiceFacade {\n    @Autowired\n    private ServiceA serviceA;\n    @Autowired\n    private ServiceB serviceB;\n\n    public void performOperation() {\n        serviceA.doSomething();\n        serviceB.doSomethingElse();\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8d77\u52d5\u6642\u30a8\u30e9\u30fc\u3092\u9632\u3050<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u69cb\u9020\u304c\u6539\u5584\u3055\u308c\u3001\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3059\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">3.4 @Qualifier\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b<\/h3>\n\n\n\n<p>\u540c\u3058\u578b\u306e\u8907\u6570\u306e\u30d3\u30fc\u30f3\u304c\u3042\u308b\u5834\u5408\u3001@Qualifier\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u306e\u30d3\u30fc\u30f3\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\npublic class UserService {\n    private final UserRepository userRepository;\n\n    @Autowired\n    public UserService(@Qualifier(\"jpaUserRepository\") UserRepository userRepository) {\n        this.userRepository = userRepository;\n    }\n}\n\n@Repository\n@Qualifier(\"jpaUserRepository\")\npublic class JpaUserRepository implements UserRepository {\n    \/\/ \u5b9f\u88c5\n}\n\n@Repository\n@Qualifier(\"mongoUserRepository\")\npublic class MongoUserRepository implements UserRepository {\n    \/\/ \u5b9f\u88c5\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u540c\u3058\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u8907\u6570\u306e\u5b9f\u88c5\u3092\u660e\u78ba\u306b\u533a\u5225\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u5b9f\u88c5\u3092\u9078\u629e\u3067\u304d\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">3.5 \u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u8003\u616e\u3057\u305fDI\u8a2d\u8a08<\/h3>\n\n\n\n<p>\u4f9d\u5b58\u6027\u6ce8\u5165\u3092\u9069\u5207\u306b\u8a2d\u8a08\u3059\u308b\u3053\u3068\u3067\u3001\u5358\u4f53\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\npublic class UserService {\n    private final UserRepository userRepository;\n\n    @Autowired\n    public UserService(UserRepository userRepository) {\n        this.userRepository = userRepository;\n    }\n\n    public User getUser(Long id) {\n        return userRepository.findById(id);\n    }\n}\n\n\/\/ \u30c6\u30b9\u30c8\u30af\u30e9\u30b9\npublic class UserServiceTest {\n    @Test\n    public void testGetUser() {\n        UserRepository mockRepository = mock(UserRepository.class);\n        when(mockRepository.findById(1L)).thenReturn(new User(1L, \"Test User\"));\n\n        UserService userService = new UserService(mockRepository);\n        User user = userService.getUser(1L);\n\n        assertEquals(\"Test User\", user.getName());\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30e2\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u3066\u4f9d\u5b58\u95a2\u4fc2\u3092\u7c21\u5358\u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u308b<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u306e\u4fe1\u983c\u6027\u3068\u901f\u5ea6\u304c\u5411\u4e0a\u3059\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">3.6 \u9069\u5207\u306a\u30b9\u30b3\u30fc\u30d7\u306e\u9078\u629e<\/h3>\n\n\n\n<p>\u30d3\u30fc\u30f3\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306a\u30b9\u30b3\u30fc\u30d7\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\n@Scope(\"singleton\") \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\npublic class UserService {\n    \/\/ \u5b9f\u88c5\n}\n\n@Component\n@Scope(\"prototype\")\npublic class PrototypeBean {\n    \/\/ \u5b9f\u88c5\n}\n\n@Component\n@Scope(value = WebApplicationContext.SCOPE_SESSION, proxyMode = ScopedProxyMode.TARGET_CLASS)\npublic class SessionScopedBean {\n    \/\/ \u5b9f\u88c5\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/li>\n\n\n\n<li>\u4e26\u884c\u51e6\u7406\u306e\u554f\u984c\u3092\u56de\u907f<\/li>\n\n\n\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u305f\u9069\u5207\u306a\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">3.7 \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30b9\u30ad\u30e3\u30f3\u306e\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30b9\u30ad\u30e3\u30f3\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8d77\u52d5\u6642\u9593\u3092\u6539\u5584\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Configuration\n@ComponentScan(basePackages = \"com.example.myapp\", \n    excludeFilters = @ComponentScan.Filter(type = FilterType.REGEX, pattern = \"com.example.myapp.legacy.*\"))\npublic class AppConfig {\n    \/\/ \u8a2d\u5b9a\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8d77\u52d5\u6642\u9593\u306e\u77ed\u7e2e<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30d3\u30fc\u30f3\u306e\u767b\u9332\u3092\u9632\u6b62<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">3.8 @Autowired\u306e\u4f7f\u7528\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b<\/h3>\n\n\n\n<p>\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u4f9d\u5b58\u95a2\u4fc2\u306e\u307f\u3092\u6ce8\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\npublic class UserService {\n    private final UserRepository userRepository;\n    private final EmailService emailService;\n\n    @Autowired\n    public UserService(UserRepository userRepository, EmailService emailService) {\n        this.userRepository = userRepository;\n        this.emailService = emailService;\n    }\n\n    \/\/ UserRepository\u3068EmailService\u306e\u307f\u3092\u4f7f\u7528\u3059\u308b\u30e1\u30bd\u30c3\u30c9\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u4f9d\u5b58\u95a2\u4fc2\u304c\u660e\u78ba\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u4f9d\u5b58\u95a2\u4fc2\u306b\u3088\u308b\u554f\u984c\u3092\u9632\u3050<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">3.9 @Primary\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>\u8907\u6570\u306e\u540c\u3058\u578b\u306e\u30d3\u30fc\u30f3\u304c\u3042\u308b\u5834\u5408\u3001@Primary\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5b9f\u88c5\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Repository\n@Primary\npublic class JpaUserRepository implements UserRepository {\n    \/\/ \u4e3b\u8981\u306a\u5b9f\u88c5\n}\n\n@Repository\npublic class LegacyUserRepository implements UserRepository {\n    \/\/ \u30ec\u30ac\u30b7\u30fc\u306a\u5b9f\u88c5\n}\n\n@Service\npublic class UserService {\n    private final UserRepository userRepository;\n\n    @Autowired\n    public UserService(UserRepository userRepository) {\n        this.userRepository = userRepository; \/\/ JpaUserRepository\u304c\u6ce8\u5165\u3055\u308c\u308b\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5b9f\u88c5\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3067\u304d\u308b<\/li>\n\n\n\n<li>@Qualifier\u306e\u904e\u5270\u306a\u4f7f\u7528\u3092\u907f\u3051\u3089\u308c\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">3.10 \u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30e1\u30bd\u30c3\u30c9\u306e\u9069\u5207\u306a\u4f7f\u7528<\/h3>\n\n\n\n<p>@PostConstruct\u3068@PreDestroy\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d3\u30fc\u30f3\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u3092\u9069\u5207\u306b\u7ba1\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\npublic class UserService {\n    private final UserRepository userRepository;\n\n    @Autowired\n    public UserService(UserRepository userRepository) {\n        this.userRepository = userRepository;\n    }\n\n    @PostConstruct\n    public void init() {\n        \/\/ \u521d\u671f\u5316\u51e6\u7406\n    }\n\n    @PreDestroy\n    public void cleanup() {\n        \/\/ \u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e\u306a\u3069\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30ea\u30bd\u30fc\u30b9\u306e\u9069\u5207\u306a\u521d\u671f\u5316\u3068\u89e3\u653e<\/li>\n\n\n\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b89\u5b9a\u6027\u5411\u4e0a<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001@Autowired\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3057\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u3001\u30c6\u30b9\u30c8\u5bb9\u6613\u306aSpring\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5404\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u3084\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u3001\u3053\u308c\u3089\u306e\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001@Autowired\u306e\u3088\u308a\u9ad8\u5ea6\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u63a2\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-19\">4. @Autowired\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u6cd5<\/h2>\n\n\n\n<p>@Autowired\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u7406\u89e3\u3057\u305f\u3089\u3001\u3088\u308a\u8907\u96d1\u306a\u30b7\u30ca\u30ea\u30aa\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u6cd5\u3092\u5b66\u3076\u3053\u3068\u3067\u3001Spring Framework\u306e\u771f\u306e\u529b\u3092\u5f15\u304d\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001@Autowired\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u6cd5\u306b\u3064\u3044\u3066\u30013\u3064\u306e\u4e3b\u8981\u306a\u30c8\u30d4\u30c3\u30af\u3092\u4e2d\u5fc3\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">4.1 \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3078\u306e\u6ce8\u5165\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u8907\u6570\u306e\u30d3\u30fc\u30f3\u3092\u4e00\u5ea6\u306b\u6ce8\u5165\u3059\u308b\u5834\u5408\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3068\u52b9\u679c\u7684\u3067\u3059\u3002Spring Framework\u306f\u3001List\u3001Set\u3001Map\u306a\u3069\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3078\u306e\u6ce8\u5165\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\npublic class MultipleRepositoryService {\n    private final List&lt;Repository&gt; repositories;\n\n    @Autowired\n    public MultipleRepositoryService(List&lt;Repository&gt; repositories) {\n        this.repositories = repositories;\n    }\n\n    public void performOperationOnAllRepositories() {\n        repositories.forEach(Repository::someOperation);\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u65b9\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001<code>Repository<\/code>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u3059\u3079\u3066\u306e\u30d3\u30fc\u30f3\u304c\u81ea\u52d5\u7684\u306b\u30ea\u30b9\u30c8\u306b\u6ce8\u5165\u3055\u308c\u307e\u3059\u3002\u3055\u3089\u306b\u3001<code>@Order<\/code>\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u6ce8\u5165\u3055\u308c\u308b\u9806\u5e8f\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Repository\n@Order(1)\npublic class PrimaryRepository implements Repository {\n    \/\/ \u5b9f\u88c5\n}\n\n@Repository\n@Order(2)\npublic class SecondaryRepository implements Repository {\n    \/\/ \u5b9f\u88c5\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">4.2 \u6761\u4ef6\u4ed8\u304d\u81ea\u52d5\u6ce8\u5165\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u3084\u74b0\u5883\u306b\u5fdc\u3058\u3066\u3001\u7570\u306a\u308b\u30d3\u30fc\u30f3\u3092\u6ce8\u5165\u3057\u305f\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002Spring Framework\u306f\u3001<code>@Conditional<\/code>\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u6761\u4ef6\u4ed8\u304d\u306e\u81ea\u52d5\u6ce8\u5165\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Configuration\npublic class DataSourceConfig {\n\n    @Bean\n    @Conditional(DevProfileCondition.class)\n    public DataSource devDataSource() {\n        return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.H2).build();\n    }\n\n    @Bean\n    @Conditional(ProdProfileCondition.class)\n    public DataSource prodDataSource() {\n        DriverManagerDataSource dataSource = new DriverManagerDataSource();\n        dataSource.setDriverClassName(\"com.mysql.cj.jdbc.Driver\");\n        dataSource.setUrl(\"jdbc:mysql:\/\/localhost:3306\/prod_db\");\n        dataSource.setUsername(\"prod_user\");\n        dataSource.setPassword(\"prod_password\");\n        return dataSource;\n    }\n}\n\npublic class DevProfileCondition implements Condition {\n    @Override\n    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {\n        return context.getEnvironment().acceptsProfiles(Profiles.of(\"dev\"));\n    }\n}\n\npublic class ProdProfileCondition implements Condition {\n    @Override\n    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {\n        return context.getEnvironment().acceptsProfiles(Profiles.of(\"prod\"));\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306b\u5fdc\u3058\u3066\u7570\u306a\u308bDataSource\u30d3\u30fc\u30f3\u304c\u6ce8\u5165\u3055\u308c\u307e\u3059\u3002\u958b\u767a\u74b0\u5883\u3067\u306f\u7d44\u307f\u8fbc\u307f\u306eH2\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u3001\u672c\u756a\u74b0\u5883\u3067\u306fMySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">4.3 \u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u7528\u3044\u305f\u67d4\u8edf\u306aDI<\/h3>\n\n\n\n<p>\u3088\u308a\u7d30\u304b\u3044\u5236\u5fa1\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u6210\u3057\u3066@Qualifier\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u306a\u4f9d\u5b58\u6027\u6ce8\u5165\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.TYPE, ElementType.ANNOTATION_TYPE})\n@Retention(RetentionPolicy.RUNTIME)\n@Qualifier\npublic @interface DataSource {\n    DataSourceType value();\n}\n\npublic enum DataSourceType {\n    PRIMARY, SECONDARY, ARCHIVE\n}\n\n@Configuration\npublic class MultipleDataSourceConfig {\n\n    @Bean\n    @DataSource(DataSourceType.PRIMARY)\n    public DataSource primaryDataSource() {\n        \/\/ \u30d7\u30e9\u30a4\u30de\u30ea\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\u306e\u8a2d\u5b9a\n    }\n\n    @Bean\n    @DataSource(DataSourceType.SECONDARY)\n    public DataSource secondaryDataSource() {\n        \/\/ \u30bb\u30ab\u30f3\u30c0\u30ea\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\u306e\u8a2d\u5b9a\n    }\n\n    @Bean\n    @DataSource(DataSourceType.ARCHIVE)\n    public DataSource archiveDataSource() {\n        \/\/ \u30a2\u30fc\u30ab\u30a4\u30d6\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\u306e\u8a2d\u5b9a\n    }\n}\n\n@Service\npublic class MultiDataSourceService {\n    private final DataSource primaryDataSource;\n    private final DataSource secondaryDataSource;\n\n    @Autowired\n    public MultiDataSourceService(\n        @DataSource(DataSourceType.PRIMARY) DataSource primaryDataSource,\n        @DataSource(DataSourceType.SECONDARY) DataSource secondaryDataSource) {\n        this.primaryDataSource = primaryDataSource;\n        this.secondaryDataSource = secondaryDataSource;\n    }\n\n    \/\/ \u30b5\u30fc\u30d3\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>@DataSource<\/code>\u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u6210\u3057\u3001\u305d\u308c\u3092\u4f7f\u7528\u3057\u3066\u8907\u6570\u306eDataSource\u30d3\u30fc\u30f3\u3092\u533a\u5225\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u540c\u3058\u578b\u306e\u8907\u6570\u306e\u30d3\u30fc\u30f3\u3092\u660e\u78ba\u306b\u8b58\u5225\u3057\u3001\u6ce8\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u6cd5\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u904e\u5ea6\u306b\u8907\u96d1\u306a\u4f9d\u5b58\u95a2\u4fc2\u306e\u7ba1\u7406\u306f\u907f\u3051\u3001\u5fc5\u8981\u306a\u5834\u5408\u306b\u306e\u307f\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001Spring Framework 5.0\u4ee5\u964d\u3067\u306f\u3001<code>@Nullable<\/code>\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5c0e\u5165\u3084Kotlin\u8a00\u8a9e\u30b5\u30dd\u30fc\u30c8\u306e\u5f37\u5316\u306a\u3069\u3001\u65b0\u3057\u3044\u6a5f\u80fd\u3082\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5b89\u5168\u3067\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001@Autowired\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-23\">5. @Autowired\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6700\u9069\u5316<\/h2>\n\n\n\n<p>@Autowired\u306f\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3059\u304c\u3001\u9069\u5207\u306b\u4f7f\u7528\u3057\u306a\u3044\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001@Autowired\u304c\u5f71\u97ff\u3092\u4e0e\u3048\u308b2\u3064\u306e\u4e3b\u8981\u306a\u9818\u57df\u3068\u3001\u305d\u308c\u305e\u308c\u306e\u6700\u9069\u5316\u6226\u7565\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">5.1 \u8d77\u52d5\u6642\u9593\u3078\u306e\u5f71\u97ff\u3068\u6700\u9069\u5316\u6226\u7565<\/h3>\n\n\n\n<p>Spring Framework\u306f\u8d77\u52d5\u6642\u306b@Autowired\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u51e6\u7406\u3057\u3001\u4f9d\u5b58\u95a2\u4fc2\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u7279\u306b\u5927\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u8d77\u52d5\u6642\u9593\u3092\u5897\u52a0\u3055\u305b\u308b\u8981\u56e0\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6700\u9069\u5316\u6226\u7565\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30b9\u30ad\u30e3\u30f3\u306e\u7bc4\u56f2\u6700\u9069\u5316<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @ComponentScan(basePackages = \"com.example.myapp.core\")<\/pre>\n\n\n\n<p>\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u307f\u3092\u30b9\u30ad\u30e3\u30f3\u5bfe\u8c61\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u8d77\u52d5\u6642\u9593\u3092\u77ed\u7e2e\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>Lazy Initialization\u306e\u6d3b\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Configuration\n   @Lazy\n   public class LazyConfig {\n       @Bean\n       public ExpensiveBean expensiveBean() {\n           return new ExpensiveBean();\n       }\n   }<\/pre>\n\n\n\n<p><code>@Lazy<\/code>\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d3\u30fc\u30f3\u306e\u521d\u671f\u5316\u3092\u5fc5\u8981\u306b\u306a\u308b\u307e\u3067\u9045\u5ef6\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\u306e\u5206\u5272<br>\u5927\u304d\u306a\u8a2d\u5b9a\u30af\u30e9\u30b9\u3092\u8907\u6570\u306e\u5c0f\u3055\u306a\u30af\u30e9\u30b9\u306b\u5206\u5272\u3059\u308b\u3053\u3068\u3067\u3001\u5fc5\u8981\u306a\u8a2d\u5b9a\u306e\u307f\u3092\u8aad\u307f\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li>AOT\uff08Ahead-of-Time\uff09\u30b3\u30f3\u30d1\u30a4\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u5229\u7528<br>Spring Native \u3092\u4f7f\u7528\u3057\u3066\u30cd\u30a4\u30c6\u30a3\u30d6\u30a4\u30e1\u30fc\u30b8\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u8d77\u52d5\u6642\u9593\u3092\u5927\u5e45\u306b\u77ed\u7e2e\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">5.2 \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u8003\u5bdf\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>@Autowired\u3092\u904e\u5270\u306b\u4f7f\u7528\u3059\u308b\u3068\u3001\u4e0d\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u30e1\u30e2\u30ea\u306b\u4fdd\u6301\u3055\u308c\u7d9a\u3051\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u9069\u5207\u306a\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Service\n   @Scope(\"singleton\")\n   public class UserService {\n       \/\/ \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30b5\u30fc\u30d3\u30b9\u306e\u5b9f\u88c5\n   }<\/pre>\n\n\n\n<p>\u72b6\u614b\u3092\u6301\u305f\u306a\u3044\u30b5\u30fc\u30d3\u30b9\u306b\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30b9\u30b3\u30fc\u30d7\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u30b9\u30b3\u30fc\u30d7\u306e\u614e\u91cd\u306a\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Component\n   @Scope(\"prototype\")\n   public class HeavyProcessor {\n       \/\/ \u30ea\u30bd\u30fc\u30b9\u3092\u591a\u304f\u6d88\u8cbb\u3059\u308b\u51e6\u7406\u306e\u5b9f\u88c5\n   }<\/pre>\n\n\n\n<p>\u30ea\u30bd\u30fc\u30b9\u3092\u591a\u304f\u6d88\u8cbb\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u3001\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u30b9\u30b3\u30fc\u30d7\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u5faa\u74b0\u53c2\u7167\u306e\u56de\u907f<br>\u5faa\u74b0\u53c2\u7167\u306f\u3001\u4e0d\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4ee3\u308f\u308a\u306b\u3001\u8a2d\u8a08\u3092\u898b\u76f4\u3059\u304b\u3001\u30bb\u30c3\u30bf\u30fc\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30d3\u30fc\u30f3\u306e\u524a\u9664<br>\u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u30d3\u30fc\u30f3\u3092\u5b9a\u671f\u7684\u306b\u898b\u76f4\u3057\u3001\u524a\u9664\u3059\u308b\u3053\u3068\u3067\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u524a\u6e1b\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u898f\u6a21\u3084\u8981\u4ef6\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002Spring Boot Actuator\u3084\u30d3\u30eb\u30c8\u30a4\u30f3\u306e\u6027\u80fd\u76e3\u8996\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5b9a\u671f\u7684\u306b\u8a08\u6e2c\u3057\u3001\u6700\u9069\u5316\u306e\u52b9\u679c\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u6700\u5f8c\u306b\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306b\u306f\u5e38\u306b\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u304c\u4f34\u3046\u3053\u3068\u3092\u8a8d\u8b58\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001Lazy Initialization\u306f\u8d77\u52d5\u6642\u9593\u3092\u77ed\u7e2e\u3057\u307e\u3059\u304c\u3001\u521d\u56de\u30a2\u30af\u30bb\u30b9\u6642\u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u304c\u5897\u52a0\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u3001\u9069\u5207\u306a\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001@Autowired\u306e\u4ee3\u66ff\u624b\u6cd5\u3068\u6bd4\u8f03\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-26\">6. @Autowired\u306e\u4ee3\u66ff\u624b\u6cd5\u3068\u6bd4\u8f03<\/h2>\n\n\n\n<p>@Autowired\u306f\u4fbf\u5229\u3067\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u72b6\u6cc1\u306b\u3088\u3063\u3066\u306f\u3088\u308a\u9069\u5207\u306a\u4ee3\u66ff\u624b\u6cd5\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u4e3b\u8981\u306a\u4ee3\u66ff\u624b\u6cd5\u3092\u7d39\u4ecb\u3057\u3001@Autowired\u3068\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-27\">6.1 JavaConfig\u3092\u7528\u3044\u305f\u660e\u793a\u7684DI<\/h3>\n\n\n\n<p>JavaConfig\u306f\u3001Java\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066Spring beans\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u578b\u5b89\u5168\u6027\u304c\u5411\u4e0a\u3057\u3001\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Configuration\npublic class AppConfig {\n    @Bean\n    public UserService userService(UserRepository userRepository) {\n        return new UserService(userRepository);\n    }\n\n    @Bean\n    public UserRepository userRepository() {\n        return new JpaUserRepository();\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u578b\u5b89\u5168\u6027\u304c\u9ad8\u3044<\/li>\n\n\n\n<li>IDE\u306e\u30b5\u30dd\u30fc\u30c8\u304c\u5145\u5b9f<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u304c\u5bb9\u6613<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#ffebeb;color:#f88080\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#f88080\"><i class=\"fas fa-exclamation\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>@Autowired\u306b\u6bd4\u3079\u3066\u30b3\u30fc\u30c9\u91cf\u304c\u5897\u3048\u308b<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u8a2d\u5b9a\u30af\u30e9\u30b9\u304c\u80a5\u5927\u5316\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-28\">6.2 @Resource\u3068@Inject\u306e\u4f7f\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n<p>@Resource\u306fJava EE\u6a19\u6e96\u3001@Inject\u306fJSR-330\u6a19\u6e96\u306e\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3067\u3059\u3002\u3053\u308c\u3089\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u975e\u4f9d\u5b58\u306e\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserService {\n    @Resource(name = \"userRepository\")\n    private UserRepository userRepository;\n\n    \/\/ \u307e\u305f\u306f\n    @Inject\n    private UserRepository userRepository;\n}<\/pre>\n\n\n\n<p>@Resource\u306f\u540d\u524d\u30d9\u30fc\u30b9\u3001@Inject\u306f\u578b\u30d9\u30fc\u30b9\u3067\u6ce8\u5165\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#b4e0fa;color:#009EF3\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#009EF3\"><i class=\"far fa-lightbulb\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u975e\u4f9d\u5b58<\/li>\n\n\n\n<li>\u4ed6\u306eDI\u30b3\u30f3\u30c6\u30ca\u3078\u306e\u79fb\u884c\u304c\u5bb9\u6613<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#ffebeb;color:#f88080\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#f88080\"><i class=\"fas fa-exclamation\"><\/i><\/span><div class=\"sng-box-msg__title\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>Spring\u56fa\u6709\u306e\u6a5f\u80fd\u304c\u4f7f\u3048\u306a\u3044\u5834\u5408\u304c\u3042\u308b<\/li>\n\n\n\n<li>@Autowired\u306b\u6bd4\u3079\u3066\u6a5f\u80fd\u304c\u9650\u5b9a\u7684<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<p>\u6bd4\u8f03\u8868\uff1a<\/p>\n\n\n<div id=\"id-ab27d6e7-f5cf-41bb-972f-82f5078ddf94\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u6027<\/th><th>@Autowired<\/th><th>JavaConfig<\/th><th>@Resource\/@Inject<\/th><\/tr><\/thead><tbody><tr><td>\u8a2d\u5b9a\u306e\u8907\u96d1\u3055<\/td><td>\u4f4e<\/td><td>\u4e2d<\/td><td>\u4f4e<\/td><\/tr><tr><td>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027<\/td><td>\u4e2d<\/td><td>\u9ad8<\/td><td>\u4e2d<\/td><\/tr><tr><td>\u30c6\u30b9\u30c8\u5bb9\u6613\u6027<\/td><td>\u4e2d<\/td><td>\u9ad8<\/td><td>\u4e2d<\/td><\/tr><tr><td>\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u4f9d\u5b58\u5ea6<\/td><td>\u9ad8<\/td><td>\u9ad8<\/td><td>\u4f4e<\/td><\/tr><tr><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/td><td>\u4e2d<\/td><td>\u9ad8<\/td><td>\u4e2d<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u4ee3\u66ff\u624b\u6cd5\u3092\u9078\u629e\u3059\u308b\u969b\u306e\u5224\u65ad\u57fa\u6e96\uff1a<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u898f\u6a21\u3068\u8907\u96d1\u3055\uff1a\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306fJavaConfig\u304c\u7ba1\u7406\u3057\u3084\u3059\u3044\u5834\u5408\u304c\u3042\u308b<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u306e\u7d4c\u9a13\u3068\u597d\u307f\uff1a\u30c1\u30fc\u30e0\u306e\u7fd2\u719f\u5ea6\u306b\u5fdc\u3058\u3066\u9078\u629e<\/li>\n\n\n\n<li>\u5c06\u6765\u7684\u306a\u79fb\u690d\u6027\uff1a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u975e\u4f9d\u5b58\u306b\u3057\u305f\u3044\u5834\u5408\u306f@Resource\/@Inject\u3092\u691c\u8a0e<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u4ef6\uff1a\u8d77\u52d5\u6642\u9593\u304c\u91cd\u8981\u306a\u5834\u5408\u306fJavaConfig\u3092\u691c\u8a0e<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>Spring Framework\u4ee5\u5916\u306b\u3082\u3001Google Guice\u3084Dagger\u306a\u3069\u306eDI\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306f\u7279\u5b9a\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\uff08\u4f8b\uff1aAndroid\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff09\u306b\u7279\u5316\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6700\u65b0\u306e\u30c8\u30ec\u30f3\u30c9\u3068\u3057\u3066\u306f\u3001\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5f71\u97ff\u3092\u53d7\u3051\u305fDI\u30d1\u30bf\u30fc\u30f3\u3084\u3001\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u304a\u3051\u308b\u8efd\u91cfDI\u306e\u6d3b\u7528\u306a\u3069\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7d50\u8ad6\u3068\u3057\u3066\u3001@Autowired\u306f\u591a\u304f\u306e\u5834\u5408\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u4ee3\u66ff\u624b\u6cd5\u3092\u691c\u8a0e\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3067\u304d\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3051\u308b@Autowired\u306e\u904b\u7528\u30ce\u30a6\u30cf\u30a6\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-29\">7. \u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3051\u308b@Autowired\u306e\u904b\u7528\u30ce\u30a6\u30cf\u30a6<\/h2>\n\n\n\n<p>\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001@Autowired\u306e\u4f7f\u7528\u304c\u8907\u96d1\u306a\u4f9d\u5b58\u95a2\u4fc2\u3092\u751f\u307f\u51fa\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fdd\u5b88\u6027\u3068\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067@Autowired\u3092\u52b9\u679c\u7684\u306b\u904b\u7528\u3059\u308b\u305f\u3081\u306e\u30ce\u30a6\u30cf\u30a6\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-30\">7.1 \u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u4f9d\u5b58\u95a2\u4fc2\u7ba1\u7406\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u9069\u5207\u306b\u7ba1\u7406\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u968e\u5c64\u578b\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u63a1\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   \u251c\u2500\u2500 core\n   \u251c\u2500\u2500 service\n   \u251c\u2500\u2500 web\n   \u2514\u2500\u2500 infrastructure<\/pre>\n\n\n\n<p>\u5404\u30ec\u30a4\u30e4\u30fc\u304c\u4e0b\u4f4d\u30ec\u30a4\u30e4\u30fc\u306b\u306e\u307f\u4f9d\u5b58\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3059\u308b\u3053\u3068\u3067\u3001\u4f9d\u5b58\u95a2\u4fc2\u3092\u5358\u7d14\u5316\u3067\u304d\u307e\u3059<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u7528\u3044\u305f\u758e\u7d50\u5408\u306e\u5b9f\u73fe<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Service\n   public class UserServiceImpl implements UserService {\n       @Autowired\n       private UserRepository userRepository;\n\n       \/\/ \u30b5\u30fc\u30d3\u30b9\u306e\u5b9f\u88c5\n   }<\/pre>\n\n\n\n<p>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u3067\u3001\u5b9f\u88c5\u306e\u8a73\u7d30\u304b\u3089\u5206\u96e2\u3057\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u7d50\u5408\u5ea6\u3092\u4e0b\u3052\u307e\u3059\u3002<\/p>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u5faa\u74b0\u4f9d\u5b58\u306e\u691c\u51fa\u3068\u89e3\u6d88<br>Spring Framework\u306e\u8d77\u52d5\u6642\u30ed\u30b0\u3092\u76e3\u8996\u3057\u3001\u5faa\u74b0\u4f9d\u5b58\u3092\u65e9\u671f\u306b\u691c\u51fa\u3057\u307e\u3059\u3002\u691c\u51fa\u3055\u308c\u305f\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u65b9\u6cd5\u3067\u89e3\u6d88\u3057\u307e\u3059\uff1a\n<ul class=\"wp-block-list\">\n<li>\u4f9d\u5b58\u95a2\u4fc2\u306e\u65b9\u5411\u3092\u898b\u76f4\u3059<\/li>\n\n\n\n<li>\u5171\u901a\u306e\u62bd\u8c61\u5316\u3092\u5c0e\u5165\u3059\u308b<\/li>\n\n\n\n<li>@Lazy\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\uff08\u6700\u5f8c\u306e\u624b\u6bb5\u3068\u3057\u3066\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-31\">7.2 \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u3092\u8003\u616e\u3057\u305fDI\u8a2d\u8a08<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8d77\u52d5\u6642\u306e\u4f9d\u5b58\u95a2\u4fc2\u89e3\u6c7a\u306e\u6700\u9069\u5316<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Configuration\n   @ComponentScan(basePackages = \"com.example.core\")\n   public class CoreConfig {}\n\n   @Configuration\n   @ComponentScan(basePackages = \"com.example.service\")\n   public class ServiceConfig {}<\/pre>\n\n\n\n<p>\u30e2\u30b8\u30e5\u30fc\u30eb\u3054\u3068\u306b\u8a2d\u5b9a\u30af\u30e9\u30b9\u3092\u5206\u5272\u3057\u3001\u5fc5\u8981\u306a\u90e8\u5206\u306e\u307f\u3092\u30b9\u30ad\u30e3\u30f3\u3059\u308b\u3053\u3068\u3067\u3001\u8d77\u52d5\u6642\u9593\u3092\u77ed\u7e2e\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u52d5\u7684\u306a\u4f9d\u5b58\u95a2\u4fc2\u306e\u7ba1\u7406<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Service\n   public class DynamicService {\n       @Autowired\n       private ApplicationContext context;\n\n       public void performOperation(String beanName) {\n           SomeInterface bean = context.getBean(beanName, SomeInterface.class);\n           bean.doSomething();\n       }\n   }<\/pre>\n\n\n\n<p>ApplicationContext\u3092\u4f7f\u7528\u3057\u3066\u3001\u5b9f\u884c\u6642\u306b\u52d5\u7684\u306b\u30d3\u30fc\u30f3\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u3082\u8003\u616e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-32\">\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e@Autowired\u4f7f\u7528\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u547d\u540d\u898f\u5247\u306e\u7d71\u4e00\n<ul class=\"wp-block-list\">\n<li>\u30d3\u30fc\u30f3\u540d\u3068\u30af\u30e9\u30b9\u540d\u306e\u4e00\u8cab\u6027\u3092\u4fdd\u3064<\/li>\n\n\n\n<li>\u5f79\u5272\u3084\u6a5f\u80fd\u3092\u660e\u78ba\u306b\u8868\u3059\u540d\u524d\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u91cd\u8981\u6027\n<ul class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u4f9d\u5b58\u95a2\u4fc2\u3092\u56f3\u793a\u3059\u308b<\/li>\n\n\n\n<li>\u5404\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u8cac\u4efb\u7bc4\u56f2\u3092\u660e\u78ba\u306b\u8a18\u8ff0\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u306e\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8\n<ul class=\"wp-block-list\">\n<li>\u4e0d\u5fc5\u8981\u306a@Autowired\u306e\u4f7f\u7528\u304c\u306a\u3044\u304b<\/li>\n\n\n\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3078\u306e\u4f9d\u5b58\u304c\u9069\u5207\u304b<\/li>\n\n\n\n<li>\u5faa\u74b0\u4f9d\u5b58\u306e\u53ef\u80fd\u6027\u304c\u306a\u3044\u304b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-33\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u6700\u9069\u5316<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Lazy Initialization\u306e\u6226\u7565\u7684\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Configuration\n   public class AppConfig {\n       @Lazy\n       @Bean\n       public ExpensiveBean expensiveBean() {\n           return new ExpensiveBean();\n       }\n   }<\/pre>\n\n\n\n<p>\u8d77\u52d5\u6642\u306b\u5fc5\u8981\u306a\u3044\u30d3\u30fc\u30f3\u306f@Lazy\u3092\u4f7f\u7528\u3057\u3066\u521d\u671f\u5316\u3092\u9045\u5ef6\u3055\u305b\u307e\u3059\u3002<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u3068\u8ca0\u8377\u30c6\u30b9\u30c8\n<ul class=\"wp-block-list\">\n<li>Spring Boot Actuator\u3092\u4f7f\u7528\u3057\u3066\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30e1\u30c8\u30ea\u30af\u30b9\u3092\u53ce\u96c6<\/li>\n\n\n\n<li>JProfiler\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u7279\u5b9a<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u65b9\u91dd\n<ul class=\"wp-block-list\">\n<li>\u5b9a\u671f\u7684\u306b\u4f9d\u5b58\u95a2\u4fc2\u30b0\u30e9\u30d5\u3092\u898b\u76f4\u3057\u3001\u8907\u96d1\u5316\u3057\u3066\u3044\u308b\u90e8\u5206\u3092\u7279\u5b9a<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u5206\u5272\u3084\u7d71\u5408\u3092\u691c\u8a0e<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067@Autowired\u3092\u52b9\u679c\u7684\u306b\u904b\u7528\u3059\u308b\u306b\u306f\u3001\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u8a2d\u8a08\u304b\u3089\u65e5\u3005\u306e\u958b\u767a\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u307e\u3067\u3001\u591a\u5c90\u306b\u308f\u305f\u308b\u8003\u616e\u304c\u5fc5\u8981\u3067\u3059\u3002\u9069\u5207\u306a\u904b\u7528\u30ce\u30a6\u30cf\u30a6\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u3001\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001@Autowired\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74\u3068\u3001\u305d\u306e\u56de\u907f\u7b56\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-34\">8. @Autowired\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74\u3068\u56de\u907f\u7b56<\/h2>\n\n\n\n<p>@Autowired\u306f\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3059\u304c\u3001\u9069\u5207\u306b\u4f7f\u7528\u3057\u306a\u3044\u3068\u4e88\u671f\u305b\u306c\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3068\u305d\u306e\u56de\u907f\u7b56\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-35\">8.1 NullPointerException\u306e\u539f\u56e0\u3068\u5bfe\u7b56<\/h3>\n\n\n\n<p>NullPointerException\u306f@Autowired\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#ffebeb;color:#f88080\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#f88080\"><i class=\"fas fa-exclamation\"><\/i><\/span><div class=\"sng-box-msg__title\">\u539f\u56e0<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30d3\u30fc\u30f3\u304c\u898b\u3064\u304b\u3089\u306a\u3044<\/li>\n\n\n\n<li>\u5faa\u74b0\u4f9d\u5b58<\/li>\n\n\n\n<li>\u30b9\u30b3\u30fc\u30d7\u306e\u4e0d\u4e00\u81f4<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#fff9e6;color:#ffb36b\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#ffb36b\"><i class=\"fas fa-pencil-alt\"><\/i><\/span><div class=\"sng-box-msg__title\">\u5f71\u97ff<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30af\u30e9\u30c3\u30b7\u30e5<\/li>\n\n\n\n<li>\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-36\">\u5bfe\u7b56\u4f8b<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>@Autowired(required=false)\u306e\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Service\n   public class UserService {\n       @Autowired(required = false)\n       private OptionalFeature optionalFeature;\n\n       public void doSomething() {\n           if (optionalFeature != null) {\n               optionalFeature.execute();\n           }\n       }\n   }<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>Optional\u306e\u6d3b\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Service\n   public class UserService {\n       @Autowired\n       private Optional&lt;OptionalFeature&gt; optionalFeature;\n\n       public void doSomething() {\n           optionalFeature.ifPresent(OptionalFeature::execute);\n       }\n   }<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u9069\u5207\u306a\u4f8b\u5916\u51e6\u7406<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Service\n   public class UserService {\n       @Autowired\n       private UserRepository userRepository;\n\n       public User getUser(Long id) {\n           try {\n               return userRepository.findById(id)\n                   .orElseThrow(() -&gt; new UserNotFoundException(id));\n           } catch (UserNotFoundException e) {\n               \/\/ \u9069\u5207\u306a\u4f8b\u5916\u51e6\u7406\n           }\n       }\n   }<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-37\">8.2 \u30c6\u30b9\u30c8\u306b\u304a\u3051\u308b\u30e2\u30c3\u30af\u5316\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>@Autowired\u3092\u4f7f\u7528\u3057\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306f\u3001\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3067\u306e\u30e2\u30c3\u30af\u5316\u3092\u56f0\u96e3\u306b\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#ffebeb;color:#f88080\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#f88080\"><i class=\"fas fa-exclamation\"><\/i><\/span><div class=\"sng-box-msg__title\">\u539f\u56e0<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>private\u30d5\u30a3\u30fc\u30eb\u30c9\u3078\u306e@Autowired\u306b\u3088\u308b\u30e2\u30c3\u30af\u56f0\u96e3<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-sgb-message\"><div class=\"memo sng-shadow-0\" style=\"border-radius:0px;background-color:#fff9e6;color:#ffb36b\"><div class=\"memo_ttl dfont\"><span class=\"sng-box-msg__icon\" style=\"background:#ffb36b\"><i class=\"fas fa-pencil-alt\"><\/i><\/span><div class=\"sng-box-msg__title\">\u5f71\u97ff<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u306e\u8907\u96d1\u5316<\/li>\n\n\n\n<li>\u30ab\u30d0\u30ec\u30c3\u30b8\u306e\u4f4e\u4e0b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-38\">\u5bfe\u7b56\u4f8b<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306e\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Service\n   public class UserService {\n       private final UserRepository userRepository;\n\n       @Autowired\n       public UserService(UserRepository userRepository) {\n           this.userRepository = userRepository;\n       }\n\n       \/\/ \u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\n   }\n\n   \/\/ \u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\n   @Test\n   public void testUserService() {\n       UserRepository mockRepository = mock(UserRepository.class);\n       UserService userService = new UserService(mockRepository);\n       \/\/ \u30c6\u30b9\u30c8\u30ed\u30b8\u30c3\u30af\n   }<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>ReflectionTestUtils\u306e\u6d3b\u7528\uff08\u6700\u5f8c\u306e\u624b\u6bb5\u3068\u3057\u3066\uff09<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Test\n   public void testUserService() {\n       UserService userService = new UserService();\n       UserRepository mockRepository = mock(UserRepository.class);\n       ReflectionTestUtils.setField(userService, \"userRepository\", mockRepository);\n       \/\/ \u30c6\u30b9\u30c8\u30ed\u30b8\u30c3\u30af\n   }<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-39\">\u305d\u306e\u4ed6\u306e\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d3\u30fc\u30f3\u306e\u91cd\u8907\u5b9a\u7fa9\uff1a\u540c\u3058\u578b\u306e\u8907\u6570\u306e\u30d3\u30fc\u30f3\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u3001@Qualifier\u3092\u4f7f\u7528\u3057\u3066\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b<\/li>\n\n\n\n<li>\u4e0d\u9069\u5207\u306a\u30b9\u30b3\u30fc\u30d7\u306e\u4f7f\u7528\uff1a\u30b9\u30c6\u30fc\u30c8\u30d5\u30eb\u306a\u30d3\u30fc\u30f3\u3092\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30b9\u30b3\u30fc\u30d7\u3067\u4f7f\u7528\u3057\u306a\u3044<\/li>\n\n\n\n<li>\u904e\u5ea6\u306b\u8907\u96d1\u306a\u4f9d\u5b58\u95a2\u4fc2\u30b0\u30e9\u30d5\uff1a\u30e2\u30b8\u30e5\u30fc\u30eb\u6027\u3092\u9ad8\u3081\u3001\u4f9d\u5b58\u95a2\u4fc2\u3092\u5358\u7d14\u5316\u3059\u308b<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\uff1a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30b9\u30ad\u30e3\u30f3\u306e\u7bc4\u56f2\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-40\">@Autowired\u3092\u5b89\u5168\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f9d\u5b58\u95a2\u4fc2\u3092\u660e\u793a\u7684\u306b\u5ba3\u8a00\u3057\u3066\u3044\u308b\u304b<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30b9\u30b3\u30fc\u30d7\u3092\u9078\u629e\u3057\u3066\u3044\u308b\u304b<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u306e\u5bb9\u6613\u6027\u3092\u78ba\u4fdd\u3057\u3066\u3044\u308b\u304b<\/li>\n\n\n\n<li>\u5faa\u74b0\u4f9d\u5b58\u3092\u907f\u3051\u3066\u3044\u308b\u304b<\/li>\n\n\n\n<li>\u5341\u5206\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u63d0\u4f9b\u3057\u3066\u3044\u308b\u304b<\/li>\n<\/ol>\n\n\n\n<p>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u3057\u3066\u3001\u53ef\u80fd\u306a\u9650\u308a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306e\u4f7f\u7528\u306f\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>Spring Framework 5.0\u4ee5\u964d\u3067\u306f\u3001@Nullable\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5c0e\u5165\u3084\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306e\u81ea\u52d5\u691c\u51fa\u306e\u6539\u5584\u306a\u3069\u3001@Autowired\u306e\u4f7f\u7528\u3092\u3088\u308a\u5b89\u5168\u306b\u3059\u308b\u305f\u3081\u306e\u6a5f\u80fd\u304c\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\npublic class EnhancedUserService {\n    private final UserRepository userRepository;\n    private final @Nullable AuditService auditService;\n\n    public EnhancedUserService(UserRepository userRepository, \n                               @Nullable AuditService auditService) {\n        this.userRepository = userRepository;\n        this.auditService = auditService;\n    }\n\n    public User getUser(Long id) {\n        User user = userRepository.findById(id)\n            .orElseThrow(() -&gt; new UserNotFoundException(id));\n        if (auditService != null) {\n            auditService.logAccess(user);\n        }\n        return user;\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u63a1\u7528\u3059\u308b\u3053\u3068\u3067\u3001NullPointerException\u306e\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3057\u3001\u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>@Autowired\u306e\u4f7f\u7528\u306b\u95a2\u3059\u308b\u843d\u3068\u3057\u7a74\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u306f\u3001\u5e38\u306b\u6700\u65b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b66\u3073\u3001\u9069\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u307e\u305f\u3001\u5b9a\u671f\u7684\u306b\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3092\u884c\u3044\u3001\u6f5c\u5728\u7684\u306a\u554f\u984c\u3092\u65e9\u671f\u306b\u767a\u898b\u3059\u308b\u3053\u3068\u3082\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Spring Framework 6.0\u4ee5\u964d\u306e@Autowired\u306b\u95a2\u3059\u308b\u65b0\u6a5f\u80fd\u3068\u5909\u66f4\u70b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-41\">9. Spring Framework 6.0\u4ee5\u964d\u306e@Autowired\uff1a\u65b0\u6a5f\u80fd\u3068\u5909\u66f4\u70b9<\/h2>\n\n\n\n<p>Spring Framework 6.0\u4ee5\u964d\u3001@Autowired\u306e\u4f7f\u7528\u65b9\u6cd5\u3084\u95a2\u9023\u6a5f\u80fd\u306b\u91cd\u8981\u306a\u5909\u66f4\u304c\u52a0\u3048\u3089\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u5909\u66f4\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b89\u5168\u6027\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001\u304a\u3088\u3073\u958b\u767a\u8005\u306e\u751f\u7523\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-42\">9.1 null\u5b89\u5168\u6027\u306e\u5411\u4e0a\u3068\u30aa\u30d7\u30b7\u30e7\u30ca\u30eb\u6ce8\u5165<\/h3>\n\n\n\n<p>Spring Framework 6.0\u3067\u306f\u3001null\u5b89\u5168\u6027\u304c\u3055\u3089\u306b\u5f37\u5316\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>@Nullable\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u7d71\u5408\u304c\u6df1\u5316\u3057\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306enull\u30c1\u30a7\u30c3\u30af\u304c\u3088\u308a\u53b3\u5bc6\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n\n\n\n<li>Optional&lt;&gt;\u3092\u4f7f\u7528\u3057\u305f\u3088\u308a\u67d4\u8edf\u306a\u6ce8\u5165\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Service\npublic class EnhancedUserService {\n    private final UserRepository userRepository;\n    private final Optional&lt;AuditService&gt; auditService;\n\n    public EnhancedUserService(UserRepository userRepository, \n                               Optional&lt;AuditService&gt; auditService) {\n        this.userRepository = userRepository;\n        this.auditService = auditService;\n    }\n\n    public User getUser(Long id) {\n        User user = userRepository.findById(id)\n            .orElseThrow(() -&gt; new UserNotFoundException(id));\n        auditService.ifPresent(service -&gt; service.logAccess(user));\n        return user;\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u5909\u66f4\u306b\u3088\u308a\u3001\u958b\u767a\u8005\u306fnull\u53c2\u7167\u306b\u95a2\u9023\u3059\u308b\u30d0\u30b0\u3092\u65e9\u671f\u306b\u767a\u898b\u3057\u3001\u3088\u308a\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-43\">9.2 AOT\u30b3\u30f3\u30d4\u30ec\u30fc\u30b7\u30e7\u30f3\u3078\u306e\u5bfe\u5fdc\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h3>\n\n\n\n<p>Spring Framework 6.0\u306f\u3001GraalVM\u30cd\u30a4\u30c6\u30a3\u30d6\u30a4\u30e1\u30fc\u30b8\u3092\u5b8c\u5168\u306b\u30b5\u30dd\u30fc\u30c8\u3057\u3001Ahead-of-Time\uff08AOT\uff09\u30b3\u30f3\u30d1\u30a4\u30eb\u306b\u5bfe\u5fdc\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8d77\u52d5\u6642\u9593\u304c\u5927\u5e45\u306b\u77ed\u7e2e\u3055\u308c\u3001\u7279\u306b\u30af\u30e9\u30a6\u30c9\u74b0\u5883\u3084\u30b3\u30f3\u30c6\u30ca\u5316\u3055\u308c\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u6709\u5229\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u6700\u9069\u5316\u3055\u308c\u3001\u30ea\u30bd\u30fc\u30b9\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3057\u305f\u3002<\/li>\n<\/ul>\n\n\n\n<p>@Autowired\u306e\u51e6\u7406\u3082\u6700\u9069\u5316\u3055\u308c\u3001AOT\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u4f9d\u5b58\u95a2\u4fc2\u304c\u89e3\u6c7a\u3055\u308c\u308b\u305f\u3081\u3001\u5b9f\u884c\u6642\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u524a\u6e1b\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Configuration\npublic class AppConfig {\n    @Bean\n    public UserService userService(UserRepository userRepository) {\n        return new UserService(userRepository);\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u8a2d\u5b9a\u306f\u3001AOT\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u6700\u9069\u5316\u3055\u308c\u3001\u8d77\u52d5\u6642\u306e\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u4f7f\u7528\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-44\">\u305d\u306e\u4ed6\u306e\u91cd\u8981\u306a\u5909\u66f4\u70b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Java 17\u4ee5\u4e0a\u306e\u30b5\u30dd\u30fc\u30c8\uff1a\u6700\u65b0\u306eJava\u6a5f\u80fd\u3092\u6d3b\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n\n\n\n<li>Jakarta EE\u3078\u306e\u79fb\u884c\uff1a<code>javax.*<\/code>\u30d1\u30c3\u30b1\u30fc\u30b8\u304c<code>jakarta.*<\/code>\u306b\u5909\u66f4\u3055\u308c\u307e\u3057\u305f\u3002<\/li>\n\n\n\n<li>\u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u7d71\u5408\u5f37\u5316\uff1a@Autowired\u304c\u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3088\u308a\u30b7\u30fc\u30e0\u30ec\u30b9\u306b\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-45\">\u65e2\u5b58\u30b3\u30fc\u30c9\u3078\u306e\u5f71\u97ff\u3068\u79fb\u884c\u6226\u7565<\/h3>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5909\u66f4\u306b\u4f34\u3044\u3001\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u306b\u5f71\u97ff\u304c\u51fa\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002Spring Framework\u30c1\u30fc\u30e0\u306f\u3001\u8a73\u7d30\u306a\u79fb\u884c\u30ac\u30a4\u30c9\u3068\u30c4\u30fc\u30eb\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u4e3b\u306a\u6ce8\u610f\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u975e\u63a8\u5968API\u306e\u524a\u9664\uff1aSpring Framework 5.x\u3067\u975e\u63a8\u5968\u3068\u3055\u308c\u3066\u3044\u305fAPI\u304c\u524a\u9664\u3055\u308c\u307e\u3057\u305f\u3002<\/li>\n\n\n\n<li>\u30d1\u30c3\u30b1\u30fc\u30b8\u540d\u306e\u5909\u66f4\uff1a<code>javax.*<\/code>\u304b\u3089<code>jakarta.*<\/code>\u3078\u306e\u79fb\u884c\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n\n\n\n<li>null\u5b89\u5168\u6027\u306e\u53b3\u683c\u5316\uff1a\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u3067null\u30c1\u30a7\u30c3\u30af\u304c\u4e0d\u5341\u5206\u306a\u7b87\u6240\u3092\u898b\u76f4\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-46\">\u5c06\u6765\u306e\u5c55\u671b<\/h3>\n\n\n\n<p>\u4eca\u5f8c\u3001@Autowired\u306f\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3068\u306e\u3055\u3089\u306a\u308b\u7d71\u5408\u3084\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u6027\u306e\u5411\u4e0a\u304c\u671f\u5f85\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001\u30af\u30e9\u30a6\u30c9\u30cd\u30a4\u30c6\u30a3\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3078\u306e\u9069\u5fdc\u3082\u9032\u3080\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>Spring Framework\u306f\u3001\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u30b5\u30dd\u30fc\u30c8\u5f37\u5316\u3084\u30af\u30e9\u30a6\u30c9\u30cd\u30a4\u30c6\u30a3\u30d6\u958b\u767a\u306e\u4fc3\u9032\u3001\u958b\u767a\u8005\u4f53\u9a13\u306e\u5411\u4e0a\u3092\u76ee\u6307\u3057\u3066\u304a\u308a\u3001@Autowired\u3082\u3053\u306e\u65b9\u5411\u6027\u306b\u6cbf\u3063\u3066\u9032\u5316\u3057\u3066\u3044\u304f\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5909\u66f4\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u8005\u306fSpring Framework\u306e\u6700\u65b0\u6a5f\u80fd\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3057\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-47\">10. \u307e\u3068\u3081\uff1a@Autowired\u306e\u52b9\u679c\u7684\u306a\u6d3b\u7528\u3068\u4eca\u5f8c\u306e\u5c55\u671b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-48\">10.1 @Autowired\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306e\u30ad\u30fc\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3092\u901a\u3058\u3066\u3001@Autowired\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u5e45\u5e83\u304f\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u52b9\u679c\u7684\u306a\u6d3b\u7528\u306e\u305f\u3081\u306e\u30ad\u30fc\u30dd\u30a4\u30f3\u30c8\u3092\u4ee5\u4e0b\u306b\u307e\u3068\u3081\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u3092\u512a\u5148\u3059\u308b<\/li>\n\n\n\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3078\u306e\u4f9d\u5b58\u3092\u6d3b\u7528\u3057\u3001\u758e\u7d50\u5408\u3092\u5b9f\u73fe\u3059\u308b<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30b9\u30b3\u30fc\u30d7\u3092\u9078\u629e\u3057\u3001\u30ea\u30bd\u30fc\u30b9\u3092\u52b9\u7387\u7684\u306b\u7ba1\u7406\u3059\u308b<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u5e38\u306b\u8003\u616e\u3057\u3001\u30e2\u30c3\u30af\u5316\u304c\u5bb9\u6613\u306a\u8a2d\u8a08\u3092\u5fc3\u304c\u3051\u308b<\/li>\n\n\n\n<li>\u5faa\u74b0\u4f9d\u5b58\u3092\u907f\u3051\u3001\u30af\u30ea\u30fc\u30f3\u306a\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u7dad\u6301\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u610f\u8b58\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u5805\u7262\u306aSpring\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-49\">10.2 Spring Framework\u306e\u9032\u5316\u3068@Autowired\u306e\u5c06\u6765<\/h3>\n\n\n\n<p>Spring Framework\u306f\u5e38\u306b\u9032\u5316\u3092\u7d9a\u3051\u3066\u304a\u308a\u3001@Autowired\u3082\u305d\u308c\u306b\u4f34\u3063\u3066\u5909\u5316\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>null\u5b89\u5168\u6027\u306e\u5411\u4e0a\u306b\u3088\u308a\u3001\u3088\u308a\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u304c\u66f8\u304d\u3084\u3059\u304f\u306a\u3063\u3066\u3044\u307e\u3059<\/li>\n\n\n\n<li>AOT\u30b3\u30f3\u30d1\u30a4\u30eb\u3078\u306e\u5bfe\u5fdc\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5927\u5e45\u306b\u6539\u5584\u3055\u308c\u3066\u3044\u307e\u3059<\/li>\n\n\n\n<li>\u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3068\u306e\u7d71\u5408\u304c\u9032\u307f\u3001\u3088\u308a\u67d4\u8edf\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u3063\u3066\u3044\u307e\u3059<\/li>\n<\/ul>\n\n\n\n<p>\u4eca\u5f8c\u306f\u3001\u30af\u30e9\u30a6\u30c9\u30cd\u30a4\u30c6\u30a3\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3078\u306e\u9069\u5fdc\u3084\u30e2\u30b8\u30e5\u30fc\u30eb\u6027\u306e\u5411\u4e0a\u304c\u3055\u3089\u306b\u9032\u3080\u3068\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3084\u30b5\u30fc\u30d0\u30fc\u30ec\u30b9\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u306e\u89aa\u548c\u6027\u3082\u9ad8\u307e\u3063\u3066\u3044\u304f\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>@Autowired\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u3053\u308c\u3089\u306e\u30c8\u30ec\u30f3\u30c9\u3092\u628a\u63e1\u3057\u3001\u7d99\u7d9a\u7684\u306b\u5b66\u7fd2\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002Spring\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u8a73\u7d30\u306a\u5b66\u7fd2\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u5b9f\u8df5\u3001\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3078\u306e\u53c2\u52a0\u306a\u3069\u3092\u901a\u3058\u3066\u3001\u30b9\u30ad\u30eb\u3092\u78e8\u3044\u3066\u3044\u304f\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>Spring Framework\u3068@Autowired\u306f\u3001Java\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u306e\u4e2d\u5fc3\u7684\u306a\u5b58\u5728\u3068\u3057\u3066\u3001\u4eca\u5f8c\u3082\u9032\u5316\u3092\u7d9a\u3051\u3066\u3044\u304f\u3067\u3057\u3087\u3046\u3002\u958b\u767a\u8005\u3068\u3057\u3066\u3001\u3053\u308c\u3089\u306e\u5909\u5316\u306b\u9069\u5fdc\u3057\u3001\u6700\u65b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":{"0":"post-270","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-java","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/270","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=270"}],"version-history":[{"count":2,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/270\/revisions"}],"predecessor-version":[{"id":273,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/270\/revisions\/273"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=270"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=270"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=270"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}