{"id":376,"date":"2025-03-24T08:54:49","date_gmt":"2025-03-23T23:54:49","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=376"},"modified":"2025-03-24T08:54:49","modified_gmt":"2025-03-23T23:54:49","slug":"%e3%80%902024%e5%b9%b4%e6%9c%80%e6%96%b0%e3%80%91spring-boot%e3%81%a7kotlin%e3%82%92%e4%bd%bf%e3%81%84%e3%81%93%e3%81%aa%e3%81%99%ef%bc%81%e5%ae%9f%e8%b7%b5%e7%9a%84%e3%83%81%e3%83%a5%e3%83%bc","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=376","title":{"rendered":"\u30102024\u5e74\u6700\u65b0\u3011Spring Boot\u3067Kotlin\u3092\u4f7f\u3044\u3053\u306a\u3059\uff01\u5b9f\u8df5\u7684\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u30685\u3064\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af"},"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\">\u306f\u3058\u3081\u306b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first last\">        <a href=\"#i-1\">\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-2\">Spring Boot\u3068Kotlin\u306e\u57fa\u672c\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-3\">\u5fc5\u8981\u306a\u958b\u767a\u74b0\u5883\u306e\u6e96\u5099<\/a>      <\/li>      <li>        <a href=\"#i-4\">Spring Initializr\u3092\u4f7f\u7528\u3057\u305f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4f5c\u6210<\/a>      <\/li>      <li>        <a href=\"#i-5\">build.gradle\u306e\u8a2d\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u521d\u3081\u3066\u306eKotlin\u30af\u30e9\u30b9\u3068Spring Boot\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u884c\u3068\u52d5\u4f5c\u78ba\u8a8d<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">Kotlin\u306e\u7279\u5fb4\u3092\u6d3b\u304b\u3057\u305fSpring Boot\u958b\u767a<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">1. Null\u5b89\u5168\u6027\u306e\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-10\">2. \u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u306e\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-11\">3. \u62e1\u5f35\u95a2\u6570\u306e\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-12\">4. Spring Boot\u3068Kotlin\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-13\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u4fdd\u5b88\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-14\">\u5b9f\u8df5\u7684\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\uff1aRESTful API\u306e\u958b\u767a<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-15\">1. \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7<\/a>      <\/li>      <li>        <a href=\"#i-16\">2. \u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u4f5c\u6210<\/a>      <\/li>      <li>        <a href=\"#i-17\">3. \u30ea\u30dd\u30b8\u30c8\u30ea\u30ec\u30a4\u30e4\u30fc\u306e\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-18\">4. \u30b5\u30fc\u30d3\u30b9\u30ec\u30a4\u30e4\u30fc\u306e\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-19\">5. \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u306e\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-20\">6. \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/a>      <\/li>      <li>        <a href=\"#i-21\">7. \u30c6\u30b9\u30c8\u306e\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-22\">8. API\u306e\u30c6\u30b9\u30c8\u3068\u52d5\u4f5c\u78ba\u8a8d<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u767a\u5c55\u7684\u30c8\u30d4\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-24\">5\u3064\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-25\">1. Kotlin DSL\u3092\u4f7f\u7528\u3057\u305f\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u8a18\u8ff0<\/a>      <\/li>      <li>        <a href=\"#i-26\">2. \u30b9\u30b3\u30fc\u30d7\u95a2\u6570\u3092\u6d3b\u7528\u3057\u305f\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u5316<\/a>      <\/li>      <li>        <a href=\"#i-27\">3. \u30b7\u30fc\u30b1\u30f3\u30b9\u64cd\u4f5c\u306b\u3088\u308b\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u51e6\u7406<\/a>      <\/li>      <li>        <a href=\"#i-28\">4. Kotlin\u306eReflection\u3092\u4f7f\u7528\u3057\u305fDI\u306e\u6700\u9069\u5316<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-29\">5. \u30a4\u30f3\u30e9\u30a4\u30f3\u95a2\u6570\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-30\">Spring Boot\u3068Kotlin\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5229\u70b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-31\">1. \u958b\u767a\u751f\u7523\u6027\u306e\u5411\u4e0a<\/a>      <\/li>      <li>        <a href=\"#i-32\">2. \u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u306e\u6539\u5584<\/a>      <\/li>      <li>        <a href=\"#i-33\">3. \u578b\u5b89\u5168\u6027\u306b\u3088\u308b\u4fe1\u983c\u6027\u306e\u5411\u4e0a<\/a>      <\/li>      <li>        <a href=\"#i-34\">4. Java\u3068\u306e\u76f8\u4e92\u904b\u7528\u6027<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-35\">5. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-36\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4e8b\u4f8b\u3068\u6210\u529f\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-37\">1. \u5927\u898f\u6a21Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff1aCoupang\uff08\u97d3\u56fd\u306eE\u30b3\u30de\u30fc\u30b9\u4f01\u696d\uff09<\/a>      <\/li>      <li>        <a href=\"#i-38\">2. \u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\uff1aRevolut\uff08\u30d5\u30a3\u30f3\u30c6\u30c3\u30af\u4f01\u696d\uff09<\/a>      <\/li>      <li>        <a href=\"#i-39\">3. \u65e5\u672c\u4f01\u696d\u306e\u4e8b\u4f8b\uff1a\u682a\u5f0f\u4f1a\u793e\u30e1\u30eb\u30ab\u30ea<\/a>      <\/li>      <li>        <a href=\"#i-40\">\u5f97\u3089\u308c\u305f\u6559\u8a13\u3068\u63a8\u5968\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-41\">\u5c06\u6765\u7684\u306a\u5c55\u671b<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-42\">\u307e\u3068\u3081\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/a>  <\/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\">\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n<p>2024\u5e74\u3001Java\u958b\u767a\u306e\u4e16\u754c\u3067\u306f Spring Boot \u3068 Kotlin \u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u6ce8\u76ee\u3092\u96c6\u3081\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5f37\u529b\u306a\u30c7\u30e5\u30aa\u306f\u3001\u958b\u767a\u52b9\u7387\u306e\u5411\u4e0a\u3068\u9ad8\u54c1\u8cea\u306a\u30b3\u30fc\u30c9\u751f\u7523\u3092\u5b9f\u73fe\u3059\u308b\u9375\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u6700\u65b0\u306e Spring Boot 3.x \u3068 Kotlin 1.9 \u3092\u6d3b\u7528\u3057\u305f\u5b9f\u8df5\u7684\u306a\u958b\u767a\u624b\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\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\">Spring Boot \u3068 Kotlin \u306e\u7d44\u307f\u5408\u308f\u305b\u306e\u9b45\u529b<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u7c21\u6f54\u3067\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c9\u8a18\u8ff0<\/li>\n\n\n\n<li>Null \u5b89\u5168\u6027\u306b\u3088\u308b\u30d0\u30b0\u306e\u5927\u5e45\u306a\u6e1b\u5c11<\/li>\n\n\n\n<li>Java \u3068\u306e 100% \u4e92\u63db\u6027\u3092\u7dad\u6301<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6700\u65b0\u306e\u958b\u767a\u74b0\u5883\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u65b9\u6cd5<\/li>\n\n\n\n<li>Kotlin \u306e\u7279\u5fb4\u3092\u6d3b\u304b\u3057\u305f Spring Boot \u958b\u767a\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n\n\n\n<li>RESTful API \u958b\u767a\u306e\u5b9f\u8df5\u7684\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<\/li>\n\n\n\n<li>\u5373\u6226\u529b\u3068\u306a\u308b 5 \u3064\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n\n\n\n<li>\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4e8b\u4f8b\u3068\u6210\u529f\u4f8b<\/li>\n<\/ol>\n\n\n\n<p>Java \u958b\u767a\u8005\u306e\u7686\u3055\u3093\u3001\u52b9\u7387\u7684\u306a\u958b\u767a\u624b\u6cd5\u3092\u6c42\u3081\u308b\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u65b9\u3005\u3001\u305d\u3057\u3066\u30c1\u30fc\u30e0\u3078\u306e\u65b0\u6280\u8853\u5c0e\u5165\u3092\u691c\u8a0e\u3055\u308c\u3066\u3044\u308b\u30ea\u30fc\u30c0\u30fc\u306e\u65b9\u3005\u306b\u3001\u3053\u306e\u8a18\u4e8b\u304c\u5927\u304d\u306a\u4fa1\u5024\u3092\u3082\u305f\u3089\u3059\u3053\u3068\u3092\u78ba\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002\u6700\u65b0\u306e\u30c8\u30ec\u30f3\u30c9\u3068\u5b9f\u8df5\u7684\u306a\u30ce\u30a6\u30cf\u30a6\u3092\u51dd\u7e2e\u3057\u305f\u5185\u5bb9\u3067\u3001\u7686\u3055\u307e\u306e Spring Boot \u3068 Kotlin \u3092\u4f7f\u3063\u305f\u958b\u767a\u30b9\u30ad\u30eb\u3092\u6b21\u306e\u30ec\u30d9\u30eb\u3078\u3068\u5f15\u304d\u4e0a\u3052\u307e\u3059\u3002\u3055\u3042\u3001\u9769\u65b0\u7684\u306a\u958b\u767a\u306e\u4e16\u754c\u3078\u98db\u3073\u8fbc\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-2\">Spring Boot\u3068Kotlin\u306e\u57fa\u672c\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7<\/h2>\n\n\n\n<p>Spring Boot\u3068Kotlin\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u958b\u767a\u3092\u59cb\u3081\u308b\u306b\u306f\u3001\u9069\u5207\u306a\u74b0\u5883\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u624b\u9806\u306b\u5f93\u3063\u3066\u30012024\u5e74\u73fe\u5728\u306e\u6700\u65b0\u74b0\u5883\u3092\u69cb\u7bc9\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u5fc5\u8981\u306a\u958b\u767a\u74b0\u5883\u306e\u6e96\u5099<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>JDK\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>OpenJDK 17\u4ee5\u4e0a\u3092\u63a8\u5968\uff08<a href=\"https:\/\/adoptopenjdk.net\/\">AdoptOpenJDK<\/a>\u304b\u3089\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u53ef\u80fd\uff09<\/li>\n\n\n\n<li>\u74b0\u5883\u5909\u6570<code>JAVA_HOME<\/code>\u306e\u8a2d\u5b9a\u3092\u5fd8\u308c\u305a\u306b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>IDE\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>IntelliJ IDEA\uff08Community Edition\u307e\u305f\u306fUltimate Edition\uff09\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>Kotlin\u30d7\u30e9\u30b0\u30a4\u30f3\u304cIDE\u306b\u6a19\u6e96\u642d\u8f09\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\uff08\u901a\u5e38\u306f\u6700\u521d\u304b\u3089\u5165\u3063\u3066\u3044\u307e\u3059\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">Spring Initializr\u3092\u4f7f\u7528\u3057\u305f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4f5c\u6210<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><a href=\"https:\/\/start.spring.io\/\">Spring Initializr<\/a> \u306b\u30a2\u30af\u30bb\u30b9<\/li>\n\n\n\n<li>\u4ee5\u4e0b\u306e\u8a2d\u5b9a\u3067\u65b0\u3057\u3044\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\uff1a\n<ul class=\"wp-block-list\">\n<li>Project: <code>Gradle - Kotlin<\/code><\/li>\n\n\n\n<li>Language: <code>Kotlin<\/code><\/li>\n\n\n\n<li>Spring Boot: <code>3.2.x<\/code>\uff082024\u5e74\u73fe\u5728\u306e\u6700\u65b0\u5b89\u5b9a\u7248\uff09<\/li>\n\n\n\n<li>Group: <code>com.yourcompany<\/code><\/li>\n\n\n\n<li>Artifact: <code>demo<\/code><\/li>\n\n\n\n<li>Dependencies:\n<ul class=\"wp-block-list\">\n<li>Spring Web<\/li>\n\n\n\n<li>Spring Data JPA<\/li>\n\n\n\n<li>Kotlin Reflect<\/li>\n\n\n\n<li>Kotlin JPA<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u300cGENERATE\u300d\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3057\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">build.gradle\u306e\u8a2d\u5b9a<\/h3>\n\n\n\n<p>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u89e3\u51cd\u3057\u3001IDE\u3067\u958b\u3044\u305f\u3089<code>build.gradle.kts<\/code>\u30d5\u30a1\u30a4\u30eb\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u91cd\u8981\u306a\u8a2d\u5b9a\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\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=\"\">import org.jetbrains.kotlin.gradle.tasks.KotlinCompile\n\nplugins {\n    id(\"org.springframework.boot\") version \"3.2.x\"\n    id(\"io.spring.dependency-management\") version \"1.1.x\"\n    kotlin(\"jvm\") version \"1.9.x\"\n    kotlin(\"plugin.spring\") version \"1.9.x\"\n    kotlin(\"plugin.jpa\") version \"1.9.x\"\n}\n\njava.sourceCompatibility = JavaVersion.VERSION_17\n\ntasks.withType&lt;KotlinCompile&gt; {\n    kotlinOptions {\n        freeCompilerArgs += \"-Xjsr305=strict\"\n        jvmTarget = \"17\"\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u521d\u3081\u3066\u306eKotlin\u30af\u30e9\u30b9\u3068Spring Boot\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/h3>\n\n\n\n<p><code>src\/main\/kotlin\/com\/yourcompany\/demo<\/code>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b<code>DemoApplication.kt<\/code>\u30d5\u30a1\u30a4\u30eb\u304c\u81ea\u52d5\u751f\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5185\u5bb9\u3092\u78ba\u8a8d\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4fee\u6b63\u3057\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=\"\">package com.yourcompany.demo\n\nimport org.springframework.boot.autoconfigure.SpringBootApplication\nimport org.springframework.boot.runApplication\n\n@SpringBootApplication\nclass DemoApplication\n\nfun main(args: Array&lt;String&gt;) {\n    runApplication&lt;DemoApplication&gt;(*args)\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u884c\u3068\u52d5\u4f5c\u78ba\u8a8d<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30bf\u30fc\u30df\u30ca\u30eb\u3067\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\uff1a<\/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=\"\">   .\/gradlew bootRun<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30d6\u30e9\u30a6\u30b6\u3067 <code>http:\/\/localhost:8080<\/code> \u306b\u30a2\u30af\u30bb\u30b9<\/li>\n\n\n\n<li>\u300cWhitelabel Error Page\u300d\u304c\u8868\u793a\u3055\u308c\u308c\u3070\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u6b63\u5e38\u306b\u8d77\u52d5\u3057\u3066\u3044\u307e\u3059<\/li>\n<\/ol>\n\n\n\n<p>\u4ee5\u4e0a\u3067\u3001Spring Boot\u3068Kotlin\u306e\u57fa\u672c\u7684\u306a\u958b\u767a\u74b0\u5883\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u306f\u5b8c\u4e86\u3067\u3059\u3002\u3053\u306e\u571f\u53f0\u306e\u4e0a\u306b\u3001\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u304b\u3089\u5b9f\u8df5\u7684\u306a\u958b\u767a\u624b\u6cd5\u3092\u5b66\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">Kotlin\u306e\u7279\u5fb4\u3092\u6d3b\u304b\u3057\u305fSpring Boot\u958b\u767a<\/h2>\n\n\n\n<p>Kotlin\u306e\u7279\u5fb4\u3092\u6d3b\u304b\u3059\u3053\u3068\u3067\u3001Spring Boot\u958b\u767a\u3092\u3088\u308a\u52b9\u7387\u7684\u306b\u3001\u305d\u3057\u3066\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u3082\u306e\u306b\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001Kotlin\u306e\u4e3b\u8981\u306a\u7279\u5fb4\u3068\u305d\u306eSpring Boot\u3067\u306e\u6d3b\u7528\u65b9\u6cd5\u3092\u5177\u4f53\u7684\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">1. Null\u5b89\u5168\u6027\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>Kotlin\u306enull\u5b89\u5168\u6027\u306f\u3001NullPointerException\u3092\u5927\u5e45\u306b\u6e1b\u5c11\u3055\u305b\u308b\u5f37\u529b\u306a\u6a5f\u80fd\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=\"\">@RestController\nclass UserController(private val userService: UserService) {\n    @GetMapping(\"\/user\/{id}\")\n    fun getUser(@PathVariable id: Long): ResponseEntity&lt;User?&gt; {\n        val user = userService.findById(id)\n        return ResponseEntity.ok(user)\n    }\n}\n\ninterface UserService {\n    fun findById(id: Long): User?\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>User?<\/code>\u578b\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u53ef\u80fd\u6027\u3092\u660e\u793a\u7684\u306b\u793a\u3057\u3066\u3044\u307e\u3059\u3002Java\u306e<code>Optional&lt;User&gt;<\/code>\u3068\u6bd4\u3079\u3066\u3001\u3088\u308a\u7c21\u6f54\u3067\u76f4\u611f\u7684\u306a\u30b3\u30fc\u30c9\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">2. \u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>Kotlin\u306e\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3084DTO\u306e\u5b9a\u7fa9\u3092\u975e\u5e38\u306b\u7c21\u6f54\u306b\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=\"\">@Entity\ndata class User(\n    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)\n    val id: Long = 0,\n    val username: String,\n    val email: String\n)<\/pre>\n\n\n\n<p>\u3053\u306e1\u884c\u3067\u3001equals()\u3001hashCode()\u3001toString()\u306a\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u81ea\u52d5\u751f\u6210\u3055\u308c\u3001Java\u3067\u540c\u7b49\u306e\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u5834\u5408\u3068\u6bd4\u3079\u3066\u30b3\u30fc\u30c9\u91cf\u304c\u5927\u5e45\u306b\u524a\u6e1b\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">3. \u62e1\u5f35\u95a2\u6570\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>\u62e1\u5f35\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u65e2\u5b58\u306eSpring Boot\u30af\u30e9\u30b9\u306b\u65b0\u3057\u3044\u6a5f\u80fd\u3092\u8ffd\u52a0\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=\"\">fun ResponseEntity.Companion.ok(message: String) = \n    ResponseEntity.ok().body(mapOf(\"message\" to message))\n\n@GetMapping(\"\/health\")\nfun healthCheck() = ResponseEntity.ok(\"Service is healthy\")<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>ResponseEntity<\/code>\u306b\u65b0\u3057\u3044\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3057\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u306e\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">4. Spring Boot\u3068Kotlin\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u6ce8\u5165\u306e\u63a8\u5968<\/strong>\uff1aKotlin\u3067\u306f\u4e3b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3057\u305fDI\uff08\u4f9d\u5b58\u6027\u6ce8\u5165\uff09\u304c\u63a8\u5968\u3055\u308c\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=\"\">@Service\nclass UserServiceImpl(\n    private val userRepository: UserRepository,\n    private val emailService: EmailService\n) : UserService {\n    \/\/ \u30b5\u30fc\u30d3\u30b9\u306e\u5b9f\u88c5\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30b3\u30eb\u30fc\u30c1\u30f3\u306e\u6d3b\u7528<\/strong>\uff1a\u975e\u540c\u671f\u51e6\u7406\u3092\u7c21\u6f54\u306b\u8a18\u8ff0\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=\"\">@Service\nclass AsyncUserService(private val userRepository: UserRepository) {\n    suspend fun processUsers() = coroutineScope {\n        val users = userRepository.findAll()\n        users.map { async { processUser(it) } }.awaitAll()\n    }\n\n    private suspend fun processUser(user: User) {\n        \/\/ \u975e\u540c\u671f\u3067\u30e6\u30fc\u30b6\u30fc\u51e6\u7406\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u4fdd\u5b88\u6027<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kotlin\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u6700\u9069\u5316\u306b\u3088\u308a\u3001\u591a\u304f\u306e\u5834\u5408\u3067Java\u3068\u540c\u7b49\u4ee5\u4e0a\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/li>\n\n\n\n<li>Null\u5b89\u5168\u6027\u306b\u3088\u308a\u3001\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u304c\u6e1b\u5c11\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b89\u5b9a\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u62e1\u5f35\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u65e2\u5b58\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u305b\u305a\u306b\u65b0\u3057\u3044\u6a5f\u80fd\u3092\u8ffd\u52a0\u3067\u304d\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\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\">\u6ce8\u610f\u70b9<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>Java\u304b\u3089\u306e\u79fb\u884c\u6642\u306b\u306f\u5b66\u7fd2\u30b3\u30b9\u30c8\u304c\u304b\u304b\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001Kotlin\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u9593\u304cJava\u3088\u308a\u9577\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<p>Kotlin\u306e\u7279\u5fb4\u3092\u6d3b\u304b\u3057\u305fSpring Boot\u958b\u767a\u3067\u306f\u3001\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u6027\u3001\u5b89\u5168\u6027\u3001\u305d\u3057\u3066\u8868\u73fe\u529b\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u958b\u767a\u52b9\u7387\u304c\u9ad8\u307e\u308a\u3001\u30d0\u30b0\u306e\u5c11\u306a\u3044\u9ad8\u54c1\u8cea\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u69cb\u7bc9\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u7279\u5fb4\u3092\u6d3b\u304b\u3057\u305f\u5b9f\u8df5\u7684\u306aRESTful API\u958b\u767a\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u306b\u9032\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-14\">\u5b9f\u8df5\u7684\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\uff1aRESTful API\u306e\u958b\u767a<\/h2>\n\n\n\n<p>\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Kotlin\u3068Spring Boot\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b7\u30f3\u30d7\u30eb\u306aTODO\u30a2\u30d7\u30ea\u306eRESTful API\u3092\u958b\u767a\u3059\u308b\u65b9\u6cd5\u3092\u5b66\u3073\u307e\u3059\u3002CRUD\uff08\u4f5c\u6210\u3001\u8aad\u53d6\u3001\u66f4\u65b0\u3001\u524a\u9664\uff09\u64cd\u4f5c\u3092\u5b9f\u88c5\u3057\u3001Kotlin\u306e\u7279\u5fb4\u3092\u6d3b\u304b\u3057\u305f\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">1. \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7<\/h3>\n\n\n\n<p>\u307e\u305a\u3001Spring Initializr\u3092\u4f7f\u7528\u3057\u3066\u65b0\u3057\u3044\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u5fc5\u8981\u306a\u4f9d\u5b58\u95a2\u4fc2\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Spring Web<\/li>\n\n\n\n<li>Spring Data JPA<\/li>\n\n\n\n<li>H2 Database<\/li>\n<\/ul>\n\n\n\n<p><code>build.gradle.kts<\/code>\u30d5\u30a1\u30a4\u30eb\u306b\u4ee5\u4e0b\u306e\u4f9d\u5b58\u95a2\u4fc2\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\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=\"\">dependencies {\n    implementation(\"org.springframework.boot:spring-boot-starter-web\")\n    implementation(\"org.springframework.boot:spring-boot-starter-data-jpa\")\n    runtimeOnly(\"com.h2database:h2\")\n    testImplementation(\"org.springframework.boot:spring-boot-starter-test\")\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">2. \u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u4f5c\u6210<\/h3>\n\n\n\n<p>Todo\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u4f5c\u6210\u3057\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=\"\">import jakarta.persistence.*\nimport java.time.LocalDateTime\n\n@Entity\ndata class Todo(\n    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)\n    val id: Long = 0,\n    var title: String,\n    var description: String,\n    var completed: Boolean = false,\n    val createdAt: LocalDateTime = LocalDateTime.now()\n)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">3. \u30ea\u30dd\u30b8\u30c8\u30ea\u30ec\u30a4\u30e4\u30fc\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>Spring Data JPA\u3092\u4f7f\u7528\u3057\u3066\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u4f5c\u6210\u3057\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=\"\">import org.springframework.data.jpa.repository.JpaRepository\n\ninterface TodoRepository : JpaRepository&lt;Todo, Long&gt;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">4. \u30b5\u30fc\u30d3\u30b9\u30ec\u30a4\u30e4\u30fc\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3092\u542b\u3080\u30b5\u30fc\u30d3\u30b9\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\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=\"\">import org.springframework.stereotype.Service\n\n@Service\nclass TodoService(private val todoRepository: TodoRepository) {\n    fun getAllTodos() = todoRepository.findAll()\n\n    fun getTodoById(id: Long): Todo = todoRepository.findById(id)\n        .orElseThrow { NoSuchElementException(\"Todo not found\") }\n\n    fun createTodo(todo: Todo) = todoRepository.save(todo)\n\n    fun updateTodo(id: Long, todoDetails: Todo): Todo {\n        return todoRepository.findById(id).map { existingTodo -&gt;\n            existingTodo.title = todoDetails.title\n            existingTodo.description = todoDetails.description\n            existingTodo.completed = todoDetails.completed\n            todoRepository.save(existingTodo)\n        }.orElseThrow { NoSuchElementException(\"Todo not found\") }\n    }\n\n    fun deleteTodo(id: Long) {\n        if (todoRepository.existsById(id)) {\n            todoRepository.deleteById(id)\n        } else {\n            throw NoSuchElementException(\"Todo not found\")\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">5. \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>RESTful\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3092\u4f5c\u6210\u3057\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=\"\">import org.springframework.http.HttpStatus\nimport org.springframework.web.bind.annotation.*\n\n@RestController\n@RequestMapping(\"\/api\/todos\")\nclass TodoController(private val todoService: TodoService) {\n\n    @GetMapping\n    fun getAllTodos() = todoService.getAllTodos()\n\n    @GetMapping(\"\/{id}\")\n    fun getTodoById(@PathVariable id: Long) = todoService.getTodoById(id)\n\n    @PostMapping\n    @ResponseStatus(HttpStatus.CREATED)\n    fun createTodo(@RequestBody todo: Todo) = todoService.createTodo(todo)\n\n    @PutMapping(\"\/{id}\")\n    fun updateTodo(@PathVariable id: Long, @RequestBody todoDetails: Todo) =\n        todoService.updateTodo(id, todoDetails)\n\n    @DeleteMapping(\"\/{id}\")\n    @ResponseStatus(HttpStatus.NO_CONTENT)\n    fun deleteTodo(@PathVariable id: Long) = todoService.deleteTodo(id)\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">6. \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/h3>\n\n\n\n<p>\u30b0\u30ed\u30fc\u30d0\u30eb\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30e9\u3092\u4f5c\u6210\u3057\u3066\u3001\u4f8b\u5916\u3092\u9069\u5207\u306b\u51e6\u7406\u3057\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=\"\">import org.springframework.http.HttpStatus\nimport org.springframework.http.ResponseEntity\nimport org.springframework.web.bind.annotation.ControllerAdvice\nimport org.springframework.web.bind.annotation.ExceptionHandler\n\n@ControllerAdvice\nclass GlobalExceptionHandler {\n\n    @ExceptionHandler(NoSuchElementException::class)\n    fun handleNotFoundException(e: NoSuchElementException): ResponseEntity&lt;String&gt; =\n        ResponseEntity(e.message, HttpStatus.NOT_FOUND)\n\n    @ExceptionHandler(Exception::class)\n    fun handleAllExceptions(e: Exception): ResponseEntity&lt;String&gt; =\n        ResponseEntity(\"An unexpected error occurred\", HttpStatus.INTERNAL_SERVER_ERROR)\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">7. \u30c6\u30b9\u30c8\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>JUnit 5\u3068MockMvc\u3092\u4f7f\u7528\u3057\u3066\u3001API\u306e\u30c6\u30b9\u30c8\u3092\u4f5c\u6210\u3057\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=\"\">import org.junit.jupiter.api.Test\nimport org.springframework.beans.factory.annotation.Autowired\nimport org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc\nimport org.springframework.boot.test.context.SpringBootTest\nimport org.springframework.http.MediaType\nimport org.springframework.test.web.servlet.MockMvc\nimport org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*\nimport org.springframework.test.web.servlet.result.MockMvcResultMatchers.*\n\n@SpringBootTest\n@AutoConfigureMockMvc\nclass TodoControllerTest {\n\n    @Autowired\n    private lateinit var mockMvc: MockMvc\n\n    @Test\n    fun `should create a new todo`() {\n        val newTodo = \"\"\"{\"title\":\"Test Todo\",\"description\":\"Test Description\"}\"\"\"\n        mockMvc.perform(post(\"\/api\/todos\")\n            .contentType(MediaType.APPLICATION_JSON)\n            .content(newTodo))\n            .andExpect(status().isCreated)\n            .andExpect(jsonPath(\"$.title\").value(\"Test Todo\"))\n    }\n\n    \/\/ \u4ed6\u306e\u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u3082\u540c\u69d8\u306b\u5b9f\u88c5\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">8. API\u306e\u30c6\u30b9\u30c8\u3068\u52d5\u4f5c\u78ba\u8a8d<\/h3>\n\n\n\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u8d77\u52d5\u3057\u3001\u4ee5\u4e0b\u306ecURL\u30b3\u30de\u30f3\u30c9\u3067API\u3092\u30c6\u30b9\u30c8\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=\"\"># TODO\u306e\u4f5c\u6210\ncurl -X POST http:\/\/localhost:8080\/api\/todos -H \"Content-Type: application\/json\" -d '{\"title\":\"Buy groceries\",\"description\":\"Milk, eggs, bread\"}'\n\n# \u5168TODO\u306e\u53d6\u5f97\ncurl http:\/\/localhost:8080\/api\/todos\n\n# \u7279\u5b9a\u306eTODO\u306e\u53d6\u5f97\ncurl http:\/\/localhost:8080\/api\/todos\/1\n\n# TODO\u306e\u66f4\u65b0\ncurl -X PUT http:\/\/localhost:8080\/api\/todos\/1 -H \"Content-Type: application\/json\" -d '{\"title\":\"Buy groceries\",\"description\":\"Milk, eggs, bread, cheese\",\"completed\":true}'\n\n# TODO\u306e\u524a\u9664\ncurl -X DELETE http:\/\/localhost:8080\/api\/todos\/1<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u767a\u5c55\u7684\u30c8\u30d4\u30c3\u30af<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3: Spring Validation\u3092\u4f7f\u7528\u3057\u3066\u5165\u529b\u30c7\u30fc\u30bf\u3092\u691c\u8a3c<\/li>\n\n\n\n<li>\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3: Spring Data JPA\u306ePageable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u6d3b\u7528<\/li>\n\n\n\n<li>API\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3: Springfox\u307e\u305f\u306fSpringdoc\u3092\u4f7f\u7528\u3057\u3066Swagger\/OpenAPI\u4ed5\u69d8\u3092\u751f\u6210<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001Kotlin\u3068Spring Boot\u3092\u4f7f\u7528\u3057\u3066RESTful API\u3092\u958b\u767a\u3059\u308b\u57fa\u672c\u7684\u306a\u624b\u9806\u3092\u5b66\u3073\u307e\u3057\u305f\u3002Kotlin\u306e\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u3001Null\u5b89\u5168\u6027\u3001\u62e1\u5f35\u95a2\u6570\u306a\u3069\u306e\u7279\u5fb4\u3092\u6d3b\u304b\u3057\u3064\u3064\u3001Spring Boot\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u7c21\u6f54\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044API\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u3001\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3001\u975e\u540c\u671f\u51e6\u7406\u306a\u3069\u306e\u9ad8\u5ea6\u306a\u30c8\u30d4\u30c3\u30af\u306b\u6311\u6226\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-24\">5\u3064\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<p>Kotlin\u3068Spring Boot\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3059\u308b\u969b\u3001\u4ee5\u4e0b\u306e5\u3064\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u3001\u5177\u4f53\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3068\u30e1\u30ea\u30c3\u30c8\u3001\u305d\u3057\u3066\u6ce8\u610f\u70b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">1. Kotlin DSL\u3092\u4f7f\u7528\u3057\u305f\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u8a18\u8ff0<\/h3>\n\n\n\n<p>Kotlin DSL\uff08Domain Specific Language\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001Spring Boot\u306e\u8a2d\u5b9a\u3092\u3088\u308a\u578b\u5b89\u5168\u304b\u3064\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001<code>build.gradle.kts<\/code>\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u4f9d\u5b58\u95a2\u4fc2\u306e\u8a2d\u5b9a\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=\"\">plugins {\n    kotlin(\"jvm\") version \"1.9.0\"\n    kotlin(\"plugin.spring\") version \"1.9.0\"\n    id(\"org.springframework.boot\") version \"3.2.0\"\n}\n\ndependencies {\n    implementation(\"org.springframework.boot:spring-boot-starter-web\")\n    implementation(\"com.fasterxml.jackson.module:jackson-module-kotlin\")\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\"><strong>\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u578b\u5b89\u5168\u6027\u304c\u5411\u4e0a\u3057\u3001\u8a2d\u5b9a\u30df\u30b9\u3092\u6e1b\u3089\u305b\u308b<\/li>\n\n\n\n<li>IDE\u306e\u30b3\u30fc\u30c9\u88dc\u5b8c\u304c\u52b9\u304f\u305f\u3081\u3001\u52b9\u7387\u7684\u306b\u8a18\u8ff0\u3067\u304d\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\"><strong>\u6ce8\u610f\u70b9<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>XML\/YAML\u30d9\u30fc\u30b9\u306e\u65e2\u5b58\u8a2d\u5b9a\u3068\u306e\u4e92\u63db\u6027\u306b\u6ce8\u610f\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>Kotlin DSL\u306e\u5b66\u7fd2\u30b3\u30b9\u30c8\u304c\u304b\u304b\u308b\u5834\u5408\u304c\u3042\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-26\">2. \u30b9\u30b3\u30fc\u30d7\u95a2\u6570\u3092\u6d3b\u7528\u3057\u305f\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u5316<\/h3>\n\n\n\n<p>Kotlin\u306e\u30b9\u30b3\u30fc\u30d7\u95a2\u6570\uff08let, run, with, apply, also\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u521d\u671f\u5316\u3068\u8a2d\u5b9a\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=\"\">@Service\nclass UserService(private val userRepository: UserRepository) {\n    fun createUser(userDto: UserDto) = userDto.let { dto -&gt;\n        User().apply {\n            username = dto.username\n            email = dto.email\n            createdAt = LocalDateTime.now()\n        }.also { user -&gt;\n            userRepository.save(user)\n        }\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\"><strong>\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3059\u308b<\/li>\n\n\n\n<li>\u4e00\u6642\u5909\u6570\u306e\u4f7f\u7528\u3092\u6e1b\u3089\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\"><strong>\u6ce8\u610f\u70b9<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u904e\u5ea6\u306a\u4f7f\u7528\u306f\u9006\u306b\u53ef\u8aad\u6027\u3092\u4e0b\u3052\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30b9\u30b3\u30fc\u30d7\u95a2\u6570\u306e\u9078\u629e\u304c\u91cd\u8981<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-27\">3. \u30b7\u30fc\u30b1\u30f3\u30b9\u64cd\u4f5c\u306b\u3088\u308b\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u51e6\u7406<\/h3>\n\n\n\n<p>Kotlin\u306e\u30b7\u30fc\u30b1\u30f3\u30b9\u64cd\u4f5c\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\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\nclass LogAnalyzerService {\n    fun analyzeLogEntries(entries: List&lt;LogEntry&gt;): AnalysisResult {\n        return entries.asSequence()\n            .filter { it.level == LogLevel.ERROR }\n            .groupBy { it.category }\n            .mapValues { (_, groupedEntries) -&gt; groupedEntries.size }\n            .toList()\n            .sortedByDescending { (_, count) -&gt; count }\n            .take(5)\n            .toMap()\n            .let { AnalysisResult(it) }\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\"><strong>\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6700\u9069\u5316\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u51e6\u7406\u3092\u5ba3\u8a00\u7684\u306b\u8a18\u8ff0\u3067\u304d\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\"><strong>\u6ce8\u610f\u70b9<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u9045\u5ef6\u8a55\u4fa1\u306e\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/li>\n\n\n\n<li>\u5c0f\u3055\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3066\u306f\u901a\u5e38\u306e\u64cd\u4f5c\u306e\u65b9\u304c\u52b9\u7387\u7684\u306a\u5834\u5408\u304c\u3042\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-28\">4. Kotlin\u306eReflection\u3092\u4f7f\u7528\u3057\u305fDI\u306e\u6700\u9069\u5316<\/h3>\n\n\n\n<p>Kotlin\u306e\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u6a5f\u80fd\u3092\u4f7f\u7528\u3057\u3066\u3001\u4f9d\u5b58\u6027\u6ce8\u5165\uff08DI\uff09\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\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\nclass CustomDiContainer {\n    inline fun &lt;reified T : Any&gt; resolve(): T {\n        val klass = T::class\n        val constructor = klass.primaryConstructor ?: throw IllegalArgumentException(\"No primary constructor found\")\n        val parameters = constructor.parameters.map { param -&gt;\n            when {\n                param.type.isMarkedNullable -&gt; null\n                else -&gt; resolve(param.type.classifier as KClass&lt;*&gt;)\n            }\n        }\n        return constructor.call(*parameters.toTypedArray())\n    }\n\n    fun &lt;T : Any&gt; resolve(klass: KClass&lt;T&gt;): T = resolve(klass.java)\n\n    @Suppress(\"UNCHECKED_CAST\")\n    fun &lt;T : Any&gt; resolve(clazz: Class&lt;T&gt;): T = when {\n        clazz.isAnnotationPresent(Service::class.java) -&gt; clazz.kotlin.objectInstance as? T\n            ?: resolve(clazz.kotlin) as T\n        else -&gt; throw IllegalArgumentException(\"Unresolvable class: ${clazz.name}\")\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\"><strong>\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u3088\u308a\u67d4\u8edf\u306aDI\u8a2d\u5b9a\u304c\u53ef\u80fd\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u30dc\u30a4\u30e9\u30fc\u30d7\u30ec\u30fc\u30c8\u30b3\u30fc\u30c9\u3092\u524a\u6e1b\u3067\u304d\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\"><strong>\u6ce8\u610f\u70b9<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306b\u6ce8\u610f\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u578b\u5b89\u5168\u6027\u304c\u4f4e\u4e0b\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-29\">5. \u30a4\u30f3\u30e9\u30a4\u30f3\u95a2\u6570\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a<\/h3>\n\n\n\n<p>\u30a4\u30f3\u30e9\u30a4\u30f3\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u9ad8\u983b\u5ea6\u3067\u547c\u3073\u51fa\u3055\u308c\u308b\u5c0f\u3055\u306a\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\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\nclass TransactionService(private val entityManager: EntityManager) {\n    inline fun &lt;T&gt; inTransaction(crossinline block: () -&gt; T): T {\n        val transaction = entityManager.transaction\n        try {\n            transaction.begin()\n            val result = block()\n            transaction.commit()\n            return result\n        } catch (e: Exception) {\n            transaction.rollback()\n            throw e\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n@Service\nclass UserService(private val transactionService: TransactionService) {\n    fun createUser(user: User) = transactionService.inTransaction {\n        \/\/ \u30e6\u30fc\u30b6\u30fc\u4f5c\u6210\u30ed\u30b8\u30c3\u30af\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\"><strong>\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30e9\u30e0\u30c0\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u524a\u6e1b\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u30ab\u30b9\u30bf\u30e0\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u69cb\u9020\u3092\u5b9a\u7fa9\u3067\u304d\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\"><strong>\u6ce8\u610f\u70b9<\/strong>:<\/div><\/div><div class=\"sng-box-msg__contents\">\n<ul class=\"wp-block-list\">\n<li>\u30d0\u30a4\u30ca\u30ea\u30b5\u30a4\u30ba\u304c\u5897\u52a0\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<\/li>\n\n\n\n<li>\u904e\u5ea6\u306a\u4f7f\u7528\u306f\u9006\u52b9\u679c\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308b<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e5\u3064\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001Kotlin\u3068Spring Boot\u3092\u4f7f\u7528\u3057\u305f\u958b\u767a\u306e\u52b9\u7387\u3068\u54c1\u8cea\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5404\u30c6\u30af\u30cb\u30c3\u30af\u306e\u7279\u6027\u3068\u5f71\u97ff\u3092\u5341\u5206\u306b\u7406\u89e3\u3057\u305f\u4e0a\u3067\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u9078\u629e\u30fb\u9069\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-30\">Spring Boot\u3068Kotlin\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5229\u70b9<\/h2>\n\n\n\n<p>Spring Boot\u3068Kotlin\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u8005\u306f\u591a\u304f\u306e\u5229\u70b9\u3092\u4eab\u53d7\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4e3b\u8981\u306a\u5229\u70b9\u3092\u307e\u3068\u3081\u307e\u3059\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-31\">1. \u958b\u767a\u751f\u7523\u6027\u306e\u5411\u4e0a<\/h3>\n\n\n\n<p>Kotlin\u306e\u7c21\u6f54\u306a\u6587\u6cd5\u3068Spring Boot\u306e\u81ea\u52d5\u8a2d\u5b9a\u6a5f\u80fd\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a\u3001\u958b\u767a\u901f\u5ea6\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001Kotlin\u306e\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3084DTO\u306e\u5b9a\u7fa9\u304c\u975e\u5e38\u306b\u7c21\u6f54\u306b\u306a\u308a\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=\"\">@Entity\ndata class User(\n    @Id @GeneratedValue\n    val id: Long = 0,\n    val name: String,\n    val email: String\n)<\/pre>\n\n\n\n<p>\u3053\u306e\u4e00\u4f8b\u3060\u3051\u3067\u3082\u3001Java\u3067\u540c\u7b49\u306e\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u5834\u5408\u3068\u6bd4\u3079\u3066\u3001\u30b3\u30fc\u30c9\u91cf\u304c\u5927\u5e45\u306b\u524a\u6e1b\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-32\">2. \u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u306e\u6539\u5584<\/h3>\n\n\n\n<p>Kotlin\u306e\u8868\u73fe\u529b\u8c4a\u304b\u306a\u6587\u6cd5\u3068Spring Boot\u306e\u898f\u7d04\u512a\u5148\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001Kotlin\u306ewhen\u5f0f\u3068Spring\u306eDI\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u6761\u4ef6\u5206\u5c90\u3092\u542b\u3080\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3092\u975e\u5e38\u306b\u660e\u78ba\u306b\u8a18\u8ff0\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=\"\">@Service\nclass PaymentService(\n    private val paypalGateway: PaypalGateway,\n    private val stripeGateway: StripeGateway\n) {\n    fun processPayment(payment: Payment) = when (payment.method) {\n        PaymentMethod.PAYPAL -&gt; paypalGateway.process(payment)\n        PaymentMethod.STRIPE -&gt; stripeGateway.process(payment)\n        else -&gt; throw UnsupportedPaymentMethodException()\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-33\">3. \u578b\u5b89\u5168\u6027\u306b\u3088\u308b\u4fe1\u983c\u6027\u306e\u5411\u4e0a<\/h3>\n\n\n\n<p>Kotlin\u306eNull\u5b89\u5168\u6027\u3068Spring Boot\u306e\u81ea\u52d5\u8a2d\u5b9a\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a\u3001\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u304c\u5927\u5e45\u306b\u6e1b\u5c11\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fe1\u983c\u6027\u304c\u5411\u4e0a\u3057\u3001\u30c7\u30d0\u30c3\u30b0\u306b\u304b\u304b\u308b\u6642\u9593\u3082\u524a\u6e1b\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-34\">4. Java\u3068\u306e\u76f8\u4e92\u904b\u7528\u6027<\/h3>\n\n\n\n<p>Kotlin\u306fJava\u3068\u306e100%\u306e\u4e92\u63db\u6027\u3092\u6301\u3064\u305f\u3081\u3001\u65e2\u5b58\u306eSpring Boot\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u6bb5\u968e\u7684\u306bKotlin\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c1\u30fc\u30e0\u306f\u5f90\u3005\u306b\u65b0\u3057\u3044\u6280\u8853\u3092\u5b66\u3073\u3001\u63a1\u7528\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-35\">5. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/h3>\n\n\n\n<p>Kotlin\u306e\u30b3\u30eb\u30fc\u30c1\u30f3\u3068Spring WebFlux\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u306a\u975e\u540c\u671f\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u9ad8\u8ca0\u8377\u306a\u74b0\u5883\u4e0b\u3067\u3082\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u696d\u754c\u52d5\u5411\u3092\u898b\u3066\u3082\u3001Kotlin\u3068Spring Boot\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u6025\u901f\u306b\u666e\u53ca\u3057\u3066\u3044\u307e\u3059\u3002Google\u3001Amazon\u3001Netflix\u306a\u3069\u306e\u5927\u624b\u4f01\u696d\u304cKotlin\u3092\u63a1\u7528\u3057\u3001Spring Framework\u81ea\u4f53\u3082Kotlin\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u5f37\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5229\u70b9\u306b\u3088\u308a\u3001Spring Boot\u3068Kotlin\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u30e2\u30c0\u30f3\u306aJVM\u30d9\u30fc\u30b9\u306e\u958b\u767a\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u9b45\u529b\u7684\u306a\u9078\u629e\u80a2\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u958b\u767a\u8005\u306e\u751f\u7523\u6027\u5411\u4e0a\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u6539\u5584\u3001\u305d\u3057\u3066\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u3092\u540c\u6642\u306b\u9054\u6210\u3067\u304d\u308b\u3001\u30d0\u30e9\u30f3\u30b9\u306e\u53d6\u308c\u305f\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-36\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4e8b\u4f8b\u3068\u6210\u529f\u4f8b<\/h2>\n\n\n\n<p>Spring Boot\u3068Kotlin\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u69d8\u3005\u306a\u898f\u6a21\u3068\u696d\u754c\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u6210\u529f\u3092\u53ce\u3081\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u4ee3\u8868\u7684\u306a\u4e8b\u4f8b\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-37\">1. \u5927\u898f\u6a21Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff1aCoupang\uff08\u97d3\u56fd\u306eE\u30b3\u30de\u30fc\u30b9\u4f01\u696d\uff09<\/h3>\n\n\n\n<p>Coupang\u306f\u3001\u6570\u767e\u4e07\u4eba\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u62b1\u3048\u308b\u5927\u898f\u6a21E\u30b3\u30de\u30fc\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u63a1\u7528\u7406\u7531<\/strong>: \u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5411\u4e0a<\/li>\n\n\n\n<li><strong>\u6d3b\u7528\u3057\u305f\u7279\u5fb4<\/strong>: Kotlin\u306e\u30b3\u30eb\u30fc\u30c1\u30f3\u3001Spring WebFlux<\/li>\n\n\n\n<li><strong>\u6210\u679c<\/strong>:<\/li>\n\n\n\n<li>\u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593\u309250%\u524a\u6e1b<\/li>\n\n\n\n<li>\u30b5\u30fc\u30d0\u30fc\u30ea\u30bd\u30fc\u30b9\u4f7f\u7528\u7387\u309230%\u6539\u5584<\/li>\n<\/ul>\n\n\n\n<p>Coupang\u306f\u3001\u9ad8\u8ca0\u8377\u6642\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u9045\u5ef6\u3092Kotlin\u306e\u30b3\u30eb\u30fc\u30c1\u30f3\u3068Spring WebFlux\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u89e3\u6c7a\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a\u3001\u52b9\u7387\u7684\u306a\u975e\u540c\u671f\u51e6\u7406\u304c\u53ef\u80fd\u3068\u306a\u308a\u3001\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-38\">2. \u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\uff1aRevolut\uff08\u30d5\u30a3\u30f3\u30c6\u30c3\u30af\u4f01\u696d\uff09<\/h3>\n\n\n\n<p>Revolut\u306f\u300170\u4ee5\u4e0a\u306e\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3092\u6301\u3064\u9769\u65b0\u7684\u306a\u91d1\u878d\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u904b\u55b6\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u63a1\u7528\u7406\u7531<\/strong>: \u958b\u767a\u901f\u5ea6\u306e\u5411\u4e0a\u3001\u30b3\u30fc\u30c9\u306e\u4fdd\u5b88\u6027\u6539\u5584<\/li>\n\n\n\n<li><strong>\u6d3b\u7528\u3057\u305f\u7279\u5fb4<\/strong>: Kotlin\u306e\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u3001Spring Cloud\u306e\u30b5\u30dd\u30fc\u30c8<\/li>\n\n\n\n<li><strong>\u6210\u679c<\/strong>:<\/li>\n\n\n\n<li>\u65b0\u6a5f\u80fd\u306e\u30ea\u30ea\u30fc\u30b9\u6642\u9593\u309240%\u77ed\u7e2e<\/li>\n\n\n\n<li>\u30d0\u30b0\u5831\u544a\u4ef6\u6570\u309260%\u6e1b\u5c11<\/li>\n<\/ul>\n\n\n\n<p>Revolut\u306f\u3001Kotlin\u306e\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u3068Spring Cloud\u306e\u5f37\u529b\u306a\u7d71\u5408\u306b\u3088\u308a\u3001\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u9593\u306e\u901a\u4fe1\u306e\u8907\u96d1\u3055\u3092\u8efd\u6e1b\u3057\u307e\u3057\u305f\u3002\u578b\u5b89\u5168\u6027\u306e\u5411\u4e0a\u306b\u3088\u308a\u3001\u958b\u767a\u8005\u306f\u3088\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u3088\u308a\u901f\u304f\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-39\">3. \u65e5\u672c\u4f01\u696d\u306e\u4e8b\u4f8b\uff1a\u682a\u5f0f\u4f1a\u793e\u30e1\u30eb\u30ab\u30ea<\/h3>\n\n\n\n<p>\u30e1\u30eb\u30ab\u30ea\u306f\u3001\u65e5\u672c\u3092\u4ee3\u8868\u3059\u308bCtoC\uff08\u500b\u4eba\u9593\u53d6\u5f15\uff09\u30de\u30fc\u30b1\u30c3\u30c8\u30d7\u30ec\u30a4\u30b9\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u63a1\u7528\u7406\u7531<\/strong>: \u958b\u767a\u751f\u7523\u6027\u306e\u5411\u4e0a\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u67d4\u8edf\u6027\u78ba\u4fdd<\/li>\n\n\n\n<li><strong>\u6d3b\u7528\u3057\u305f\u7279\u5fb4<\/strong>: Kotlin\u306e\u7c21\u6f54\u306a\u6587\u6cd5\u3001Spring Boot\u306e\u9ad8\u3044\u62e1\u5f35\u6027<\/li>\n\n\n\n<li><strong>\u6210\u679c<\/strong>:<\/li>\n\n\n\n<li>\u65b0\u6a5f\u80fd\u958b\u767a\u901f\u5ea6\u304c30%\u5411\u4e0a<\/li>\n\n\n\n<li>\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c20%\u6539\u5584<\/li>\n<\/ul>\n\n\n\n<p>\u30e1\u30eb\u30ab\u30ea\u306f\u3001\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u306e\u6bb5\u968e\u7684\u79fb\u884c\u3092\u3001Kotlin\u3068Java\u306e\u512a\u308c\u305f\u76f8\u4e92\u904b\u7528\u6027\u3092\u6d3b\u304b\u3057\u3066\u5b9f\u73fe\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u6226\u7565\u306b\u3088\u308a\u3001\u65e2\u5b58\u30b7\u30b9\u30c6\u30e0\u3092\u7dad\u6301\u3057\u306a\u304c\u3089\u3001\u65b0\u3057\u3044\u6280\u8853\u306e\u30e1\u30ea\u30c3\u30c8\u3092\u5f90\u3005\u306b\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-40\">\u5f97\u3089\u308c\u305f\u6559\u8a13\u3068\u63a8\u5968\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u4e8b\u4f8b\u304b\u3089\u3001\u4ee5\u4e0b\u306e\u6559\u8a13\u3068\u63a8\u5968\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u304c\u5c0e\u304d\u51fa\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Spring Boot\u3068Kotlin\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3068\u306e\u89aa\u548c\u6027\u304c\u975e\u5e38\u306b\u9ad8\u3044<\/li>\n\n\n\n<li>Kotlin\u306e\u30b3\u30eb\u30fc\u30c1\u30f3\u3092\u6d3b\u7528\u3057\u305f\u975e\u540c\u671f\u51e6\u7406\u304c\u3001\u9ad8\u8ca0\u8377\u30b7\u30b9\u30c6\u30e0\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u306b\u52b9\u679c\u7684<\/li>\n\n\n\n<li>\u65e2\u5b58\u306eJava\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304b\u3089\u306e\u6bb5\u968e\u7684\u306a\u79fb\u884c\u304c\u53ef\u80fd\u3067\u3001\u30ea\u30b9\u30af\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3089\u308c\u308b<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-41\">\u5c06\u6765\u7684\u306a\u5c55\u671b<\/h3>\n\n\n\n<p>Spring Boot\u3068Kotlin\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u4eca\u5f8c\u3055\u3089\u306b\u666e\u53ca\u304c\u9032\u3080\u3068\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002\u7279\u306b\u3001\u9ad8\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u6271\u3046Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30c7\u30fc\u30bf\u51e6\u7406\u304c\u5fc5\u8981\u306a\u30b7\u30b9\u30c6\u30e0\u3067\u3001\u305d\u306e\u771f\u4fa1\u3092\u767a\u63ee\u3059\u308b\u3067\u3057\u3087\u3046\u3002\u307e\u305f\u3001\u983b\u7e41\u306a\u6a5f\u80fd\u8ffd\u52a0\u3084\u5909\u66f4\u304c\u6c42\u3081\u3089\u308c\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3044\u3066\u3082\u3001\u9ad8\u3044\u958b\u767a\u751f\u7523\u6027\u3068\u4fdd\u5b88\u6027\u306e\u9762\u3067\u5927\u304d\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6210\u529f\u4e8b\u4f8b\u306f\u3001Spring Boot\u3068Kotlin\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u3001\u73fe\u4ee3\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306b\u304a\u3051\u308b\u5f37\u529b\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3042\u306a\u305f\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u3001\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u691c\u8a0e\u3057\u3066\u307f\u3066\u306f\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-42\">\u307e\u3068\u3081\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h2>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Spring Boot\u3068Kotlin\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u306e\u9b45\u529b\u3068\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u65b9\u6cd5\u3092\u63a2\u3063\u3066\u304d\u307e\u3057\u305f\u3002Kotlin\u306e\u7c21\u6f54\u306a\u6587\u6cd5\u3068Null\u5b89\u5168\u6027\u3001Spring Boot\u306e\u5f37\u529b\u306a\u81ea\u52d5\u8a2d\u5b9a\u6a5f\u80fd\u3068\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30b5\u30dd\u30fc\u30c8\u304c\u3001\u9ad8\u751f\u7523\u6027\u3068\u9ad8\u54c1\u8cea\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3092\u53ef\u80fd\u306b\u3059\u308b\u3053\u3068\u3092\u5b66\u3073\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5c0f\u898f\u6a21\u306a\u30b5\u30a4\u30c9\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067Kotlin\u3068Spring Boot\u3092\u8a66\u3057\u3066\u307f\u308b<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u3067\u52c9\u5f37\u4f1a\u3092\u958b\u50ac\u3057\u3001Kotlin\u306e\u77e5\u8b58\u3092\u5171\u6709\u3059\u308b<\/li>\n\n\n\n<li>\u65e2\u5b58\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4e00\u90e8\u6a5f\u80fd\u3092Kotlin\u3067\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u307f\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u3055\u3089\u306a\u308b\u5b66\u7fd2\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30ea\u30bd\u30fc\u30b9\u304c\u5f79\u7acb\u3061\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u66f8\u7c4d\uff1a\u300cKotlin in Action\u300d\u300cSpring Boot in Action\u300d<\/li>\n\n\n\n<li>\u30aa\u30f3\u30e9\u30a4\u30f3\u30b3\u30fc\u30b9\uff1aKotlin Koans\u3001Udemy \u306e Spring Boot + Kotlin \u30b3\u30fc\u30b9<\/li>\n\n\n\n<li>\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff1aKotlin\u516c\u5f0f\u30b5\u30a4\u30c8\u3001Spring Framework\u516c\u5f0f\u30ac\u30a4\u30c9<\/li>\n<\/ul>\n\n\n\n<p>Kotlin\u3068Spring Boot\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u30e2\u30c0\u30f3\u306aJVM\u958b\u767a\u306e\u5f37\u529b\u306a\u9078\u629e\u80a2\u3067\u3059\u3002\u7d99\u7d9a\u7684\u306a\u5b66\u7fd2\u3068\u5b9f\u8df5\u3092\u901a\u3058\u3066\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u67d4\u8edf\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306e\u30b9\u30ad\u30eb\u3092\u78e8\u3044\u3066\u3044\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u7686\u3055\u3093\u306e\u6210\u529f\u4e8b\u4f8b\u3092\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3067\u5171\u6709\u3059\u308b\u3053\u3068\u3092\u697d\u3057\u307f\u306b\u3057\u3066\u3044\u307e\u3059\uff01<\/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-376","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\/376","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=376"}],"version-history":[{"count":2,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/376\/revisions"}],"predecessor-version":[{"id":390,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/376\/revisions\/390"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}