{"id":1080,"date":"2025-03-24T08:52:45","date_gmt":"2025-03-23T23:52:45","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1080"},"modified":"2025-03-24T08:52:45","modified_gmt":"2025-03-23T23:52:45","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91slf4j%e3%81%a7%e5%ae%9f%e7%8f%be%e3%81%99%e3%82%8b3%e3%81%a4%e3%81%ae%e9%ab%98%e5%93%81%e8%b3%aa%e3%83%ad%e3%82%b0%e7%ae%a1%e7%90%86","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1080","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011SLF4J\u3067\u5b9f\u73fe\u3059\u308b3\u3064\u306e\u9ad8\u54c1\u8cea\u30ed\u30b0\u7ba1\u7406\u624b\u6cd5 &#8211; \u5b9f\u4f8b\u3068\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\">SLF4J\u3068\u306f\uff1f\u73fe\u5834\u3067\u9078\u3070\u308c\u7d9a\u3051\u308b\u7406\u7531\u3092\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">Java\u754c\u9688\u3067\u5e83\u304f\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u30ed\u30ae\u30f3\u30b0\u30d5\u30a1\u30b5\u30fc\u30c9<\/a>      <\/li>      <li>        <a href=\"#i-2\">\u5f93\u6765\u306e\u30ed\u30ae\u30f3\u30b0\u5b9f\u88c5\u306b\u304a\u3051\u308b3\u3064\u306e\u8ab2\u984c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">SLF4J\u306b\u3088\u3063\u3066\u5b9f\u73fe\u3067\u304d\u308b\u7406\u60f3\u7684\u306a\u30ed\u30b0\u7ba1\u7406<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">SLF4J\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5c0e\u5165\u3059\u308b\u624b\u9806<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u5fc5\u8981\u306a\u4f9d\u5b58\u95a2\u4fc2\u306e\u8ffd\u52a0\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-9\">\u57fa\u672c\u7684\u306a\u30ed\u30b0\u51fa\u529b\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u9069\u5207\u306a\u4f7f\u3044\u5206\u3051\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-15\">\u73fe\u5834\u3067\u4f7f\u3048\u308b\u5b9f\u8df5\u7684\u306aSLF4J\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u30ed\u30b0\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-19\">\u4f8b\u5916\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u306e\u52b9\u7387\u7684\u306a\u8a18\u9332\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-22\">\u30de\u30fc\u30ab\u30fc\u3092\u4f7f\u7528\u3057\u305f\u67d4\u8edf\u306a\u30ed\u30b0\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-26\">SLF4J\u3092\u4f7f\u7528\u3057\u305f\u30ed\u30b0\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-27\">\u30d7\u30ed\u30c0\u30af\u30b7\u30e7\u30f3\u74b0\u5883\u3067\u306e\u6700\u9069\u306a\u30ed\u30b0\u30ec\u30d9\u30eb\u8a2d\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-30\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u30ed\u30b0\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-33\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305f\u30ed\u30b0\u51fa\u529b\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-37\">\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-38\">Multiple SLF4J bindings\u306e\u30a8\u30e9\u30fc\u5bfe\u51e6\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-41\">NoClassDefFoundError\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u5bfe\u51e6\u624b\u9806<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-44\">\u30ed\u30b0\u304c\u51fa\u529b\u3055\u308c\u306a\u3044\u5834\u5408\u306e\u30c7\u30d0\u30c3\u30b0\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-47\">\u307e\u3068\u3081\uff1a\u52b9\u679c\u7684\u306a\u30ed\u30b0\u7ba1\u7406\u306e\u305f\u3081\u306b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-48\">SLF4J\u5c0e\u5165\u306e\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-49\">\u5b9f\u8df5\u306e\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-50\">\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/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\">SLF4J\u3068\u306f\uff1f\u73fe\u5834\u3067\u9078\u3070\u308c\u7d9a\u3051\u308b\u7406\u7531\u3092\u89e3\u8aac<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">Java\u754c\u9688\u3067\u5e83\u304f\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u30ed\u30ae\u30f3\u30b0\u30d5\u30a1\u30b5\u30fc\u30c9<\/h3>\n\n\n\n<p>Simple Logging Facade for Java\uff08SLF4J\uff09\u306f\u3001Java\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b\u30ed\u30b0\u51fa\u529b\u3092\u62bd\u8c61\u5316\u3059\u308b\u305f\u3081\u306e\u30d5\u30a1\u30b5\u30fc\u30c9\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u88c5\u3057\u305f\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3059\u3002Spring Boot\u3084Hibernate\u306a\u3069\u3001\u591a\u304f\u306e\u4e3b\u8981\u306aJava\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u6a19\u6e96\u7684\u306b\u63a1\u7528\u3055\u308c\u3066\u304a\u308a\u3001\u73fe\u4ee3\u306eJava\u958b\u767a\u306b\u304a\u3044\u3066\u4e8b\u5b9f\u4e0a\u306e\u6a19\u6e96\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u3092\u6301\u3063\u3066\u3044\u307e\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\">\u7279\u5fb4<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\">\n<li><strong>\u30ed\u30ae\u30f3\u30b0\u5b9f\u88c5\u3068\u306e\u5206\u96e2<\/strong>: \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u3092\u30ed\u30b0\u5b9f\u88c5\uff08Logback\u3001Log4j\u306a\u3069\uff09\u304b\u3089\u5b8c\u5168\u306b\u5207\u308a\u96e2\u3059\u3053\u3068\u304c\u53ef\u80fd<\/li>\n\n\n\n<li><strong>\u30b7\u30f3\u30d7\u30eb\u306aAPI<\/strong>: \u76f4\u611f\u7684\u3067\u4f7f\u3044\u3084\u3059\u3044API\u3092\u63d0\u4f9b<\/li>\n\n\n\n<li><strong>\u9ad8\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong>: \u6700\u9069\u5316\u3055\u308c\u305f\u5b9f\u88c5\u306b\u3088\u308a\u3001\u9ad8\u901f\u306a\u30ed\u30b0\u51fa\u529b\u3092\u5b9f\u73fe<\/li>\n\n\n\n<li><strong>\u8c4a\u5bcc\u306a\u6a5f\u80fd<\/strong>: \u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u3055\u308c\u305f\u30ed\u30b0\u30e1\u30c3\u30bb\u30fc\u30b8\u3001\u30de\u30fc\u30ab\u30fc\u306b\u3088\u308b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306a\u3069\u3092\u30b5\u30dd\u30fc\u30c8<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u5f93\u6765\u306e\u30ed\u30ae\u30f3\u30b0\u5b9f\u88c5\u306b\u304a\u3051\u308b3\u3064\u306e\u8ab2\u984c<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5b9f\u88c5\u306e\u56fa\u5b9a\u5316\u306b\u3088\u308b\u67d4\u8edf\u6027\u306e\u6b20\u5982<\/strong><\/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=\"\">\/\/ \u5f93\u6765\u306e\u5b9f\u88c5\u4f8b\uff08Log4j\u3092\u76f4\u63a5\u4f7f\u7528\uff09\nimport org.apache.log4j.Logger;\n\npublic class UserService {\n    private static final Logger logger = Logger.getLogger(UserService.class);\n    \/\/ \u30ed\u30b0\u5b9f\u88c5\u3092\u5909\u66f4\u3059\u308b\u5834\u5408\u3001\u3059\u3079\u3066\u306e\u30af\u30e9\u30b9\u3067\u4fee\u6b63\u304c\u5fc5\u8981\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4f9d\u5b58\u95a2\u4fc2\u306e\u7af6\u5408<\/strong><\/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=\"\">&lt;!-- \u7570\u306a\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u7570\u306a\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u30ed\u30b0\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u4f9d\u5b58\u3059\u308b\u4f8b --&gt;\n&lt;dependencies&gt;\n    &lt;dependency&gt;\n        &lt;groupId&gt;org.springframework&lt;\/groupId&gt;\n        &lt;!-- Log4j 1.2\u3092\u4f7f\u7528 --&gt;\n    &lt;\/dependency&gt;\n    &lt;dependency&gt;\n        &lt;groupId&gt;org.hibernate&lt;\/groupId&gt;\n        &lt;!-- Log4j 2.x\u3092\u4f7f\u7528 --&gt;\n    &lt;\/dependency&gt;\n&lt;\/dependencies&gt;<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30c6\u30b9\u30c8\u6642\u306e\u5236\u5fa1\u306e\u96e3\u3057\u3055<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30ed\u30b0\u51fa\u529b\u306e\u691c\u8a3c\u304c\u56f0\u96e3<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u74b0\u5883\u3067\u306e\u51fa\u529b\u30ec\u30d9\u30eb\u306e\u5236\u5fa1\u304c\u8907\u96d1<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">SLF4J\u306b\u3088\u3063\u3066\u5b9f\u73fe\u3067\u304d\u308b\u7406\u60f3\u7684\u306a\u30ed\u30b0\u7ba1\u7406<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7d71\u4e00\u3055\u308c\u305f\u30ed\u30b0\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/strong><\/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=\"\">\/\/ SLF4J\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\u4f8b\nimport org.slf4j.Logger;\nimport org.slf4j.LoggerFactory;\n\npublic class UserService {\n    private static final Logger logger = LoggerFactory.getLogger(UserService.class);\n\n    public void createUser(String username) {\n        \/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u3055\u308c\u305f\u30ed\u30b0\u30e1\u30c3\u30bb\u30fc\u30b8\n        logger.info(\"Creating new user: {}\", username);\n\n        try {\n            \/\/ \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\n        } catch (Exception e) {\n            \/\/ \u4f8b\u5916\u30ed\u30b0\u306e\u51fa\u529b\n            logger.error(\"Failed to create user: {}\", username, e);\n        }\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u67d4\u8edf\u306a\u5b9f\u88c5\u5207\u308a\u66ff\u3048<\/strong><\/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=\"\">&lt;!-- Logback\u5b9f\u88c5\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408 --&gt;\n&lt;dependency&gt;\n    &lt;groupId&gt;ch.qos.logback&lt;\/groupId&gt;\n    &lt;artifactId&gt;logback-classic&lt;\/artifactId&gt;\n    &lt;version&gt;1.4.11&lt;\/version&gt;\n&lt;\/dependency&gt;\n\n&lt;!-- Log4j 2\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001binding\u3092\u5909\u66f4\u3059\u308b\u3060\u3051 --&gt;\n&lt;dependency&gt;\n    &lt;groupId&gt;org.apache.logging.log4j&lt;\/groupId&gt;\n    &lt;artifactId&gt;log4j-slf4j-impl&lt;\/artifactId&gt;\n    &lt;version&gt;2.20.0&lt;\/version&gt;\n&lt;\/dependency&gt;<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u9ad8\u5ea6\u306a\u6a5f\u80fd\u306b\u3088\u308b\u52b9\u7387\u7684\u306a\u30ed\u30b0\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6761\u4ef6\u4ed8\u304d\u30ed\u30b0\u51fa\u529b<\/strong><\/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=\"\">if (logger.isDebugEnabled()) {\n    logger.debug(\"Complex object state: {}\", expensiveOperation());\n}<\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30de\u30fc\u30ab\u30fc\u306b\u3088\u308b\u5206\u985e<\/strong><\/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=\"\">import org.slf4j.Marker;\nimport org.slf4j.MarkerFactory;\n\npublic class SecurityAuditService {\n    private static final Marker SECURITY_MARKER = MarkerFactory.getMarker(\"SECURITY\");\n    private static final Logger logger = LoggerFactory.getLogger(SecurityAuditService.class);\n\n    public void auditLogin(String username) {\n        logger.info(SECURITY_MARKER, \"User login attempt: {}\", username);\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001SLF4J\u306f\u5f93\u6765\u306e\u30ed\u30ae\u30f3\u30b0\u5b9f\u88c5\u306e\u8ab2\u984c\u3092\u89e3\u6c7a\u3057\u3001\u3088\u308a\u67d4\u8edf\u3067\u7ba1\u7406\u3057\u3084\u3059\u3044\u30ed\u30b0\u30b7\u30b9\u30c6\u30e0\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u3001\u305d\u306e\u6069\u6075\u306f\u9855\u8457\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">SLF4J\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5c0e\u5165\u3059\u308b\u624b\u9806<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u5fc5\u8981\u306a\u4f9d\u5b58\u95a2\u4fc2\u306e\u8ffd\u52a0\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306bSLF4J\u3092\u5c0e\u5165\u3059\u308b\u306b\u306f\u3001\u4e3b\u306b\u4ee5\u4e0b\u306e2\u3064\u306e\u4f9d\u5b58\u95a2\u4fc2\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>SLF4J API<\/li>\n\n\n\n<li>SLF4J\u5b9f\u88c5\uff08\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\uff09<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-6\">Maven\u3067\u306e\u8a2d\u5b9a\u4f8b<\/h4>\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=\"\">&lt;dependencies&gt;\n    &lt;!-- SLF4J API --&gt;\n    &lt;dependency&gt;\n        &lt;groupId&gt;org.slf4j&lt;\/groupId&gt;\n        &lt;artifactId&gt;slf4j-api&lt;\/artifactId&gt;\n        &lt;version&gt;2.0.9&lt;\/version&gt;\n    &lt;\/dependency&gt;\n\n    &lt;!-- Logback\u5b9f\u88c5\uff08\u63a8\u5968\uff09 --&gt;\n    &lt;dependency&gt;\n        &lt;groupId&gt;ch.qos.logback&lt;\/groupId&gt;\n        &lt;artifactId&gt;logback-classic&lt;\/artifactId&gt;\n        &lt;version&gt;1.4.11&lt;\/version&gt;\n    &lt;\/dependency&gt;\n&lt;\/dependencies&gt;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-7\">Gradle\u3067\u306e\u8a2d\u5b9a\u4f8b<\/h4>\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.slf4j:slf4j-api:2.0.9'\n    implementation 'ch.qos.logback:logback-classic:1.4.11'\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-8\">Logback\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb (src\/main\/resources\/logback.xml)<\/h4>\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=\"\">&lt;configuration&gt;\n    &lt;appender name=\"CONSOLE\" class=\"ch.qos.logback.core.ConsoleAppender\"&gt;\n        &lt;encoder&gt;\n            &lt;pattern&gt;%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n&lt;\/pattern&gt;\n        &lt;\/encoder&gt;\n    &lt;\/appender&gt;\n\n    &lt;appender name=\"FILE\" class=\"ch.qos.logback.core.rolling.RollingFileAppender\"&gt;\n        &lt;file&gt;logs\/application.log&lt;\/file&gt;\n        &lt;rollingPolicy class=\"ch.qos.logback.core.rolling.TimeBasedRollingPolicy\"&gt;\n            &lt;fileNamePattern&gt;logs\/application.%d{yyyy-MM-dd}.log&lt;\/fileNamePattern&gt;\n            &lt;maxHistory&gt;30&lt;\/maxHistory&gt;\n        &lt;\/rollingPolicy&gt;\n        &lt;encoder&gt;\n            &lt;pattern&gt;%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n&lt;\/pattern&gt;\n        &lt;\/encoder&gt;\n    &lt;\/appender&gt;\n\n    &lt;root level=\"INFO\"&gt;\n        &lt;appender-ref ref=\"CONSOLE\" \/&gt;\n        &lt;appender-ref ref=\"FILE\" \/&gt;\n    &lt;\/root&gt;\n&lt;\/configuration&gt;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u57fa\u672c\u7684\u306a\u30ed\u30b0\u51fa\u529b\u306e\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-10\">1. \u30ed\u30ac\u30fc\u306e\u521d\u671f\u5316<\/h4>\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.slf4j.Logger;\nimport org.slf4j.LoggerFactory;\n\npublic class UserService {\n    \/\/ \u30af\u30e9\u30b9\u5358\u4f4d\u3067\u30ed\u30ac\u30fc\u3092\u521d\u671f\u5316\n    private static final Logger logger = LoggerFactory.getLogger(UserService.class);\n\n    \/\/ \u30e1\u30bd\u30c3\u30c9\u5b9f\u88c5\n    public User createUser(String username, String email) {\n        logger.debug(\"Attempting to create user: {}\", username);\n\n        try {\n            \/\/ \u30e6\u30fc\u30b6\u30fc\u4f5c\u6210\u30ed\u30b8\u30c3\u30af\n            User user = new User(username, email);\n            logger.info(\"Successfully created user: {}\", username);\n            return user;\n        } catch (Exception e) {\n            logger.error(\"Failed to create user: {}\", username, e);\n            throw e;\n        }\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-11\">2. \u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u3055\u308c\u305f\u30ed\u30b0\u51fa\u529b<\/h4>\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=\"\">\/\/ \u63a8\u5968\u3055\u308c\u308b\u65b9\u6cd5\uff08\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\uff09\nlogger.info(\"Processing order #{} for customer: {}\", orderId, customerName);\n\n\/\/ \u975e\u63a8\u5968\uff08\u6587\u5b57\u5217\u9023\u7d50\uff09\nlogger.info(\"Processing order #\" + orderId + \" for customer: \" + customerName);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u9069\u5207\u306a\u4f7f\u3044\u5206\u3051\u65b9<\/h3>\n\n\n\n<p>\u5404\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u4f7f\u7528\u30b7\u30fc\u30f3\u3068\u5b9f\u88c5\u4f8b\u3092\u4ee5\u4e0b\u306e\u8868\u306b\u307e\u3068\u3081\u307e\u3059\uff1a<\/p>\n\n\n<div id=\"id-7ee3aed6-2cfc-4d11-b6e8-7f40eab9c503\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30ed\u30b0\u30ec\u30d9\u30eb<\/th><th>\u4f7f\u7528\u30b7\u30fc\u30f3<\/th><th>\u5b9f\u88c5\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>ERROR<\/td><td>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u52d5\u4f5c\u306b\u91cd\u5927\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u30a8\u30e9\u30fc<\/td><td><code>logger.error(\"Database connection failed\", ex);<\/code><\/td><\/tr><tr><td>WARN<\/td><td>\u8b66\u544a\u3002\u5bfe\u5fdc\u304c\u5fc5\u8981\u3060\u304c\u5373\u6642\u306e\u4ecb\u5165\u306f\u4e0d\u8981<\/td><td><code>logger.warn(\"API rate limit reached: {}\", endpoint);<\/code><\/td><\/tr><tr><td>INFO<\/td><td>\u91cd\u8981\u306a\u696d\u52d9\u30a4\u30d9\u30f3\u30c8\u306e\u8a18\u9332<\/td><td><code>logger.info(\"Order #{} processed successfully\", orderId);<\/code><\/td><\/tr><tr><td>DEBUG<\/td><td>\u958b\u767a\u6642\u306e\u30c7\u30d0\u30c3\u30b0\u60c5\u5831<\/td><td><code>logger.debug(\"Cache hit ratio: {}%\", hitRatio);<\/code><\/td><\/tr><tr><td>TRACE<\/td><td>\u6700\u3082\u8a73\u7d30\u306a\u30c7\u30d0\u30c3\u30b0\u60c5\u5831<\/td><td><code>logger.trace(\"Method entry - args: {}\", Arrays.toString(args));<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-13\">\u5b9f\u88c5\u4f8b\uff1a\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u6761\u4ef6\u4ed8\u304d\u51fa\u529b<\/h4>\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 PerformanceMonitor {\n    private static final Logger logger = LoggerFactory.getLogger(PerformanceMonitor.class);\n\n    public void monitorMethodExecution(String methodName, long executionTime) {\n        \/\/ DEBUG\u304c\u6709\u52b9\u306a\u5834\u5408\u306e\u307f\u5b9f\u884c\u3055\u308c\u308b\n        if (logger.isDebugEnabled()) {\n            logger.debug(\"Method {} execution time: {} ms\", methodName, executionTime);\n        }\n\n        \/\/ \u5b9f\u884c\u6642\u9593\u304c\u95be\u5024\u3092\u8d85\u3048\u305f\u5834\u5408\u306fWARN\u30ed\u30b0\u3092\u51fa\u529b\n        if (executionTime &gt; 1000) {\n            logger.warn(\"Method {} execution time exceeded threshold: {} ms\", \n                       methodName, executionTime);\n        }\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-14\">MDC\uff08Mapped Diagnostic Context\uff09\u306e\u6d3b\u7528\u4f8b<\/h4>\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.slf4j.MDC;\n\npublic class RequestHandler {\n    private static final Logger logger = LoggerFactory.getLogger(RequestHandler.class);\n\n    public void handleRequest(String requestId, String userId) {\n        MDC.put(\"requestId\", requestId);\n        MDC.put(\"userId\", userId);\n\n        try {\n            logger.info(\"Processing request\");\n            \/\/ \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\n            logger.info(\"Request processed successfully\");\n        } finally {\n            MDC.clear(); \/\/ \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n        }\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001SLF4J\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u7d71\u4e00\u3055\u308c\u305f\u65b9\u6cd5\u3067\u30ed\u30b0\u51fa\u529b\u3092\u7ba1\u7406\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u52d5\u4f5c\u72b6\u6cc1\u3092\u52b9\u679c\u7684\u306b\u76e3\u8996\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-15\">\u73fe\u5834\u3067\u4f7f\u3048\u308b\u5b9f\u8df5\u7684\u306aSLF4J\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u30ed\u30b0\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001SLF4J\u306e\u91cd\u8981\u306a\u6a5f\u80fd\u306e\u4e00\u3064\u3067\u3059\u3002\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u306a\u304c\u3089\u3001\u3088\u308a\u660e\u78ba\u306a\u30ed\u30b0\u51fa\u529b\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-17\">1. \u57fa\u672c\u7684\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u5316<\/h4>\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 OrderService {\n    private static final Logger logger = LoggerFactory.getLogger(OrderService.class);\n\n    public void processOrder(Order order) {\n        \/\/ \u8907\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u305f\u4f8b\n        logger.info(\"Processing order #{} for customer {} - total amount: \u00a5{}\",\n            order.getId(), order.getCustomerName(), order.getTotalAmount());\n\n        \/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e toString() \u3092\u4f7f\u7528\n        logger.debug(\"Order details: {}\", order);\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-18\">2. \u6761\u4ef6\u4ed8\u304d\u30ed\u30b0\u51fa\u529b\u306e\u6700\u9069\u5316<\/h4>\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 PerformanceAwareService {\n    private static final Logger logger = LoggerFactory.getLogger(PerformanceAwareService.class);\n\n    public void complexOperation() {\n        if (logger.isDebugEnabled()) {\n            \/\/ \u9ad8\u30b3\u30b9\u30c8\u306a\u64cd\u4f5c\u306f\u30ed\u30b0\u304c\u6709\u52b9\u306a\u5834\u5408\u306e\u307f\u5b9f\u884c\n            String complexState = generateComplexState();\n            logger.debug(\"System state: {}\", complexState);\n        }\n\n        \/\/ \u914d\u5217\u3084\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u51fa\u529b\n        List&lt;String&gt; items = getItems();\n        logger.info(\"Retrieved {} items: {}\", items.size(), items);\n    }\n\n    private String generateComplexState() {\n        \/\/ \u9ad8\u30b3\u30b9\u30c8\u306a\u51e6\u7406\n        return \"...\";\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u4f8b\u5916\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u306e\u52b9\u7387\u7684\u306a\u8a18\u9332\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u4f8b\u5916\u51e6\u7406\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u4e0a\u3067\u91cd\u8981\u3067\u3059\u3002SLF4J\u3092\u4f7f\u7528\u3057\u3066\u3001\u52b9\u679c\u7684\u306a\u4f8b\u5916\u30ed\u30b0\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-20\">1. \u57fa\u672c\u7684\u306a\u4f8b\u5916\u30ed\u30b0<\/h4>\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 DatabaseService {\n    private static final Logger logger = LoggerFactory.getLogger(DatabaseService.class);\n\n    public void saveData(Data data) {\n        try {\n            \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\n            repository.save(data);\n        } catch (SQLException e) {\n            \/\/ \u4f8b\u5916\u3068\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u540c\u6642\u306b\u8a18\u9332\n            logger.error(\"Failed to save data: {}\", data.getId(), e);\n            throw new DatabaseException(\"Data save failed\", e);\n        }\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-21\">2. \u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/h4>\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 ExceptionHandlingService {\n    private static final Logger logger = LoggerFactory.getLogger(ExceptionHandlingService.class);\n\n    public void handleException(Throwable ex, String operationContext) {\n        \/\/ \u4f8b\u5916\u306e\u7a2e\u985e\u306b\u5fdc\u3058\u305f\u9069\u5207\u306a\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u9078\u629e\n        if (ex instanceof BusinessException) {\n            logger.warn(\"Business rule violation in {}: {}\", \n                operationContext, ex.getMessage());\n        } else if (ex instanceof SecurityException) {\n            logger.error(\"Security violation detected in {}\", \n                operationContext, ex);\n        } else {\n            logger.error(\"Unexpected error in {}\", \n                operationContext, ex);\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u30de\u30fc\u30ab\u30fc\u3092\u4f7f\u7528\u3057\u305f\u67d4\u8edf\u306a\u30ed\u30b0\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h3>\n\n\n\n<p>\u30de\u30fc\u30ab\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30ed\u30b0\u3092\u30ab\u30c6\u30b4\u30ea\u5206\u3051\u3057\u3001\u52b9\u7387\u7684\u306a\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-23\">1. \u30de\u30fc\u30ab\u30fc\u306e\u5b9a\u7fa9\u3068\u4f7f\u7528<\/h4>\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 SecurityAuditService {\n    private static final Logger logger = LoggerFactory.getLogger(SecurityAuditService.class);\n\n    \/\/ \u30de\u30fc\u30ab\u30fc\u306e\u5b9a\u7fa9\n    private static final Marker SECURITY = MarkerFactory.getMarker(\"SECURITY\");\n    private static final Marker AUDIT = MarkerFactory.getMarker(\"AUDIT\");\n    private static final Marker CONFIDENTIAL = MarkerFactory.getMarker(\"CONFIDENTIAL\");\n\n    \/\/ \u30de\u30fc\u30ab\u30fc\u306e\u968e\u5c64\u5316\n    static {\n        SECURITY.add(AUDIT);\n        SECURITY.add(CONFIDENTIAL);\n    }\n\n    public void logSecurityEvent(String event, String username) {\n        logger.info(SECURITY, \"Security event: {} - User: {}\", \n            event, username);\n    }\n\n    public void logConfidentialAccess(String resource, String username) {\n        logger.warn(CONFIDENTIAL, \"Confidential resource access: {} by user: {}\", \n            resource, username);\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-24\">2. \u30de\u30fc\u30ab\u30fc\u3092\u4f7f\u7528\u3057\u305f\u30ed\u30b0\u8a2d\u5b9a\uff08logback.xml\uff09<\/h4>\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=\"\">&lt;configuration&gt;\n    &lt;appender name=\"SECURITY_FILE\" class=\"ch.qos.logback.core.rolling.RollingFileAppender\"&gt;\n        &lt;file&gt;logs\/security.log&lt;\/file&gt;\n        &lt;filter class=\"ch.qos.logback.core.filter.EvaluatorFilter\"&gt;\n            &lt;evaluator class=\"ch.qos.logback.classic.boolex.JaninoEventEvaluator\"&gt;\n                &lt;expression&gt;\n                    marker != null &amp;amp;&amp;amp; marker.contains(\"SECURITY\")\n                &lt;\/expression&gt;\n            &lt;\/evaluator&gt;\n            &lt;OnMismatch&gt;DENY&lt;\/OnMismatch&gt;\n            &lt;OnMatch&gt;NEUTRAL&lt;\/OnMatch&gt;\n        &lt;\/filter&gt;\n        &lt;encoder&gt;\n            &lt;pattern&gt;%d [%thread] %-5level %marker %logger{36} - %msg%n&lt;\/pattern&gt;\n        &lt;\/encoder&gt;\n    &lt;\/appender&gt;\n\n    &lt;!-- \u30de\u30fc\u30ab\u30fc\u5225\u306e\u30ed\u30b0\u30ec\u30d9\u30eb\u8a2d\u5b9a --&gt;\n    &lt;logger name=\"com.example.security\" level=\"INFO\" additivity=\"false\"&gt;\n        &lt;appender-ref ref=\"SECURITY_FILE\" \/&gt;\n    &lt;\/logger&gt;\n&lt;\/configuration&gt;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-25\">3. \u5b9f\u8df5\u7684\u306a\u30de\u30fc\u30ab\u30fc\u6d3b\u7528\u4f8b<\/h4>\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 TransactionService {\n    private static final Logger logger = LoggerFactory.getLogger(TransactionService.class);\n\n    private static final Marker TRANSACTION = MarkerFactory.getMarker(\"TRANSACTION\");\n    private static final Marker FINANCIAL = MarkerFactory.getMarker(\"FINANCIAL\");\n\n    public void processTransaction(Transaction tx) {\n        MDC.put(\"txId\", tx.getId());\n        try {\n            logger.info(TRANSACTION, \"Starting transaction processing: {}\", tx.getId());\n\n            if (tx.getAmount().compareTo(BigDecimal.valueOf(1000000)) &gt; 0) {\n                logger.warn(FINANCIAL, \"Large transaction detected: \u00a5{}\", \n                    tx.getAmount());\n            }\n\n            \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u51e6\u7406\n            logger.info(TRANSACTION, \"Transaction {} completed successfully\", \n                tx.getId());\n        } catch (Exception e) {\n            logger.error(TRANSACTION, \"Transaction {} failed\", tx.getId(), e);\n            throw e;\n        } finally {\n            MDC.remove(\"txId\");\n        }\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7ba1\u7406\u3057\u3084\u3059\u304f\u3001\u554f\u984c\u306e\u8ffd\u8de1\u304c\u5bb9\u6613\u306a\u30ed\u30b0\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u672c\u756a\u74b0\u5883\u3067\u6d3b\u7528\u3059\u308b\u969b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-26\">SLF4J\u3092\u4f7f\u7528\u3057\u305f\u30ed\u30b0\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-27\">\u30d7\u30ed\u30c0\u30af\u30b7\u30e7\u30f3\u74b0\u5883\u3067\u306e\u6700\u9069\u306a\u30ed\u30b0\u30ec\u30d9\u30eb\u8a2d\u5b9a<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-28\">1. \u74b0\u5883\u5225\u306e\u30ed\u30b0\u30ec\u30d9\u30eb\u8a2d\u5b9a\u6226\u7565<\/h4>\n\n\n<div id=\"id-2d3400a1-afe6-4ae2-aa49-357b901df3db\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u74b0\u5883<\/th><th>\u63a8\u5968\u30ed\u30b0\u30ec\u30d9\u30eb<\/th><th>\u8a2d\u5b9a\u7406\u7531<\/th><\/tr><\/thead><tbody><tr><td>\u958b\u767a\u74b0\u5883<\/td><td>DEBUG<\/td><td>\u8a73\u7d30\u306a\u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u306e\u78ba\u8a8d\u304c\u5fc5\u8981<\/td><\/tr><tr><td>\u30c6\u30b9\u30c8\u74b0\u5883<\/td><td>INFO<\/td><td>\u6a5f\u80fd\u30c6\u30b9\u30c8\u306b\u5fc5\u8981\u306a\u60c5\u5831\u3092\u8a18\u9332<\/td><\/tr><tr><td>\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\u74b0\u5883<\/td><td>INFO<\/td><td>\u672c\u756a\u3068\u540c\u3058\u8a2d\u5b9a\u3067\u30c6\u30b9\u30c8<\/td><\/tr><tr><td>\u672c\u756a\u74b0\u5883<\/td><td>WARN<\/td><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30c7\u30a3\u30b9\u30af\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-29\">2. \u74b0\u5883\u5225\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u4f8b\uff08logback-spring.xml\uff09<\/h4>\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=\"\">&lt;configuration&gt;\n    &lt;!-- \u74b0\u5883\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u8aad\u307f\u8fbc\u307f --&gt;\n    &lt;springProperty scope=\"context\" name=\"activeProfile\" source=\"spring.profiles.active\"\/&gt;\n\n    &lt;!-- \u5171\u901a\u8a2d\u5b9a --&gt;\n    &lt;property name=\"LOG_FILE\" value=\"logs\/application\"\/&gt;\n    &lt;property name=\"LOG_PATTERN\" value=\"%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n\"\/&gt;\n\n    &lt;!-- \u74b0\u5883\u5225\u306e\u8a2d\u5b9a --&gt;\n    &lt;springProfile name=\"production\"&gt;\n        &lt;root level=\"WARN\"&gt;\n            &lt;appender-ref ref=\"ROLLING_FILE\"\/&gt;\n            &lt;appender-ref ref=\"ERROR_FILE\"\/&gt;\n        &lt;\/root&gt;\n\n        &lt;!-- \u91cd\u8981\u306a\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306f INFO \u30ec\u30d9\u30eb\u3067\u8a18\u9332 --&gt;\n        &lt;logger name=\"com.example.business\" level=\"INFO\"\/&gt;\n    &lt;\/springProfile&gt;\n\n    &lt;springProfile name=\"development\"&gt;\n        &lt;root level=\"DEBUG\"&gt;\n            &lt;appender-ref ref=\"CONSOLE\"\/&gt;\n            &lt;appender-ref ref=\"DEBUG_FILE\"\/&gt;\n        &lt;\/root&gt;\n    &lt;\/springProfile&gt;\n&lt;\/configuration&gt;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-30\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u30ed\u30b0\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-31\">1. \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/h4>\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 OptimizedLoggingService {\n    private static final Logger logger = LoggerFactory.getLogger(OptimizedLoggingService.class);\n\n    public void processLargeData(List&lt;DataItem&gt; items) {\n        \/\/ \u30ac\u30fc\u30c9\u7bc0\u306b\u3088\u308b\u30ed\u30b0\u8a55\u4fa1\u306e\u6700\u9069\u5316\n        if (logger.isDebugEnabled()) {\n            \/\/ \u5927\u91cf\u30c7\u30fc\u30bf\u306e\u30ed\u30b0\u51fa\u529b\u3092\u5236\u5fa1\n            logger.debug(\"Processing {} items: {}\", \n                items.size(), \n                items.stream()\n                    .limit(10)\n                    .map(DataItem::getId)\n                    .collect(Collectors.joining(\", \"))\n            );\n        }\n\n        \/\/ \u30d0\u30c3\u30c1\u51e6\u7406\u306e\u9032\u6357\u30ed\u30b0\n        AtomicInteger processedCount = new AtomicInteger(0);\n        items.forEach(item -&gt; {\n            processItem(item);\n            if (processedCount.incrementAndGet() % 1000 == 0) {\n                logger.info(\"Processed {} of {} items\", \n                    processedCount.get(), items.size());\n            }\n        });\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-32\">2. \u30c7\u30a3\u30b9\u30af I\/O \u306e\u6700\u9069\u5316<\/h4>\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=\"\">&lt;configuration&gt;\n    &lt;!-- \u975e\u540c\u671f\u30ed\u30b0\u30a2\u30da\u30f3\u30c0\u30fc\u306e\u8a2d\u5b9a --&gt;\n    &lt;appender name=\"ASYNC\" class=\"ch.qos.logback.classic.AsyncAppender\"&gt;\n        &lt;appender-ref ref=\"FILE\"\/&gt;\n        &lt;queueSize&gt;512&lt;\/queueSize&gt;\n        &lt;discardingThreshold&gt;0&lt;\/discardingThreshold&gt;\n        &lt;includeCallerData&gt;false&lt;\/includeCallerData&gt;\n        &lt;neverBlock&gt;true&lt;\/neverBlock&gt;\n    &lt;\/appender&gt;\n\n    &lt;!-- \u30ed\u30fc\u30ea\u30f3\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u8a2d\u5b9a --&gt;\n    &lt;appender name=\"FILE\" class=\"ch.qos.logback.core.rolling.RollingFileAppender\"&gt;\n        &lt;file&gt;${LOG_FILE}.log&lt;\/file&gt;\n        &lt;rollingPolicy class=\"ch.qos.logback.core.rolling.TimeBasedRollingPolicy\"&gt;\n            &lt;fileNamePattern&gt;${LOG_FILE}.%d{yyyy-MM-dd}.gz&lt;\/fileNamePattern&gt;\n            &lt;maxHistory&gt;30&lt;\/maxHistory&gt;\n            &lt;totalSizeCap&gt;3GB&lt;\/totalSizeCap&gt;\n        &lt;\/rollingPolicy&gt;\n        &lt;encoder&gt;\n            &lt;pattern&gt;${LOG_PATTERN}&lt;\/pattern&gt;\n        &lt;\/encoder&gt;\n    &lt;\/appender&gt;\n&lt;\/configuration&gt;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-33\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305f\u30ed\u30b0\u51fa\u529b\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-34\">1. \u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u60c5\u5831\u306e\u53d6\u308a\u6271\u3044<\/h4>\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 SecureLoggingService {\n    private static final Logger logger = LoggerFactory.getLogger(SecureLoggingService.class);\n\n    public void processPayment(PaymentInfo payment) {\n        \/\/ \u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u60c5\u5831\u306e\u30de\u30b9\u30af\u51e6\u7406\n        String maskedCardNumber = maskCardNumber(payment.getCardNumber());\n        logger.info(\"Processing payment for order #{} with card: {}\", \n            payment.getOrderId(), maskedCardNumber);\n\n        try {\n            \/\/ \u652f\u6255\u3044\u51e6\u7406\n            paymentGateway.process(payment);\n        } catch (PaymentException e) {\n            \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u304b\u3089\u3082\u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u60c5\u5831\u3092\u9664\u5916\n            logger.error(\"Payment failed for order #{}: {}\", \n                payment.getOrderId(), e.getMessage());\n            throw e;\n        }\n    }\n\n    private String maskCardNumber(String cardNumber) {\n        if (cardNumber == null || cardNumber.length() &lt; 4) {\n            return \"****\";\n        }\n        return \"*\".repeat(cardNumber.length() - 4) + \n            cardNumber.substring(cardNumber.length() - 4);\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-35\">2. \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a4\u30d9\u30f3\u30c8\u306e\u30ed\u30b0\u8a2d\u5b9a<\/h4>\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 SecurityLoggingService {\n    private static final Logger logger = LoggerFactory.getLogger(SecurityLoggingService.class);\n    private static final Marker SECURITY = MarkerFactory.getMarker(\"SECURITY\");\n\n    public void logSecurityEvent(SecurityEvent event) {\n        \/\/ \u30a4\u30d9\u30f3\u30c8\u306e\u91cd\u8981\u5ea6\u306b\u5fdc\u3058\u305f\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u9078\u629e\n        switch (event.getSeverity()) {\n            case HIGH:\n                logger.error(SECURITY, \"Critical security event: {}\", event);\n                break;\n            case MEDIUM:\n                logger.warn(SECURITY, \"Security warning: {}\", event);\n                break;\n            case LOW:\n                logger.info(SECURITY, \"Security notice: {}\", event);\n                break;\n        }\n\n        \/\/ \u8ffd\u52a0\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\u3092 MDC \u306b\u8a18\u9332\n        MDC.put(\"eventId\", event.getId());\n        MDC.put(\"userId\", event.getUserId());\n        MDC.put(\"ipAddress\", event.getIpAddress());\n\n        try {\n            \/\/ \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a4\u30d9\u30f3\u30c8\u306e\u51e6\u7406\n            securityEventHandler.handle(event);\n        } finally {\n            MDC.clear();\n        }\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-36\">3. \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u4f8b<\/h4>\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=\"\">&lt;configuration&gt;\n    &lt;!-- \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ed\u30b0\u7528\u30a2\u30da\u30f3\u30c0\u30fc --&gt;\n    &lt;appender name=\"SECURITY_FILE\" class=\"ch.qos.logback.core.rolling.RollingFileAppender\"&gt;\n        &lt;file&gt;logs\/security.log&lt;\/file&gt;\n        &lt;rollingPolicy class=\"ch.qos.logback.core.rolling.TimeBasedRollingPolicy\"&gt;\n            &lt;fileNamePattern&gt;logs\/security.%d{yyyy-MM-dd}.gz&lt;\/fileNamePattern&gt;\n            &lt;maxHistory&gt;365&lt;\/maxHistory&gt;\n        &lt;\/rollingPolicy&gt;\n        &lt;encoder class=\"ch.qos.logback.classic.encoder.PatternLayoutEncoder\"&gt;\n            &lt;pattern&gt;%d{ISO8601} [%thread] %-5level %logger{36} - %msg%n&lt;\/pattern&gt;\n        &lt;\/encoder&gt;\n    &lt;\/appender&gt;\n\n    &lt;!-- \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ed\u30b0\u306e\u5206\u96e2 --&gt;\n    &lt;logger name=\"com.example.security\" additivity=\"false\"&gt;\n        &lt;appender-ref ref=\"SECURITY_FILE\"\/&gt;\n    &lt;\/logger&gt;\n&lt;\/configuration&gt;<\/pre>\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\u30bb\u30ad\u30e5\u30a2\u3067\u52b9\u7387\u7684\u306a\u30ed\u30b0\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u904b\u7528\u3067\u906d\u9047\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-37\">\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-38\">Multiple SLF4J bindings\u306e\u30a8\u30e9\u30fc\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-39\">1. \u30a8\u30e9\u30fc\u306e\u6982\u8981<\/h4>\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=\"\">SLF4J: Class path contains multiple SLF4J bindings.\nSLF4J: Found binding in [jar:file:\/path\/to\/logback-classic-1.2.3.jar!\/org\/slf4j\/impl\/StaticLoggerBinder.class]\nSLF4J: Found binding in [jar:file:\/path\/to\/slf4j-log4j12-1.7.25.jar!\/org\/slf4j\/impl\/StaticLoggerBinder.class]<\/pre>\n\n\n\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001\u30af\u30e9\u30b9\u30d1\u30b9\u4e0a\u306b\u8907\u6570\u306eSLF4J\u5b9f\u88c5\uff08\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\uff09\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-40\">2. \u89e3\u6c7a\u624b\u9806<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f9d\u5b58\u95a2\u4fc2\u306e\u78ba\u8a8d<\/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=\"\"># Maven\u306e\u5834\u5408\nmvn dependency:tree | grep \"slf4j\"\n\n# Gradle\u306e\u5834\u5408\n.\/gradlew dependencies | grep \"slf4j\"<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u7af6\u5408\u3059\u308b\u4f9d\u5b58\u95a2\u4fc2\u306e\u9664\u5916\uff08Maven\u4f8b\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=\"\">&lt;dependency&gt;\n    &lt;groupId&gt;org.springframework.boot&lt;\/groupId&gt;\n    &lt;artifactId&gt;spring-boot-starter-web&lt;\/artifactId&gt;\n    &lt;exclusions&gt;\n        &lt;exclusion&gt;\n            &lt;groupId&gt;org.springframework.boot&lt;\/groupId&gt;\n            &lt;artifactId&gt;spring-boot-starter-logging&lt;\/artifactId&gt;\n        &lt;\/exclusion&gt;\n    &lt;\/exclusions&gt;\n&lt;\/dependency&gt;\n\n&lt;!-- \u4f7f\u7528\u3057\u305f\u3044\u30ed\u30ae\u30f3\u30b0\u5b9f\u88c5\u306e\u307f\u3092\u8ffd\u52a0 --&gt;\n&lt;dependency&gt;\n    &lt;groupId&gt;ch.qos.logback&lt;\/groupId&gt;\n    &lt;artifactId&gt;logback-classic&lt;\/artifactId&gt;\n    &lt;version&gt;1.4.11&lt;\/version&gt;\n&lt;\/dependency&gt;<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>Gradle\u3067\u306e\u9664\u5916\u8a2d\u5b9a<\/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=\"\">configurations.all {\n    exclude group: 'org.slf4j', module: 'slf4j-log4j12'\n    exclude group: 'log4j', module: 'log4j'\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-41\">NoClassDefFoundError\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u5bfe\u51e6\u624b\u9806<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-42\">1. \u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3<\/h4>\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=\"\">Exception in thread \"main\" java.lang.NoClassDefFoundError: org\/slf4j\/LoggerFactory\n    at com.example.MyApplication.main(MyApplication.java:10)\nCaused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-43\">2. \u89e3\u6c7a\u624b\u9806\u3068\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f9d\u5b58\u95a2\u4fc2\u306e\u78ba\u8a8d<\/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=\"\">&lt;!-- \u5fc5\u9808\u306e\u4f9d\u5b58\u95a2\u4fc2 --&gt;\n&lt;dependency&gt;\n    &lt;groupId&gt;org.slf4j&lt;\/groupId&gt;\n    &lt;artifactId&gt;slf4j-api&lt;\/artifactId&gt;\n    &lt;version&gt;2.0.9&lt;\/version&gt;\n&lt;\/dependency&gt;\n\n&lt;!-- \u5b9f\u88c5\u306e\u4f9d\u5b58\u95a2\u4fc2\uff08\u4f8b\uff1aLogback\uff09 --&gt;\n&lt;dependency&gt;\n    &lt;groupId&gt;ch.qos.logback&lt;\/groupId&gt;\n    &lt;artifactId&gt;logback-classic&lt;\/artifactId&gt;\n    &lt;version&gt;1.4.11&lt;\/version&gt;\n&lt;\/dependency&gt;<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u4e92\u63db\u6027\u78ba\u8a8d\u8868<\/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=\"\">SLF4J API    | Logback Classic | Log4j\n-------------|-----------------|--------\n2.0.x        | 1.4.x          | 2.19.x+\n1.7.x        | 1.2.x          | 1.2.x<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30af\u30e9\u30b9\u30d1\u30b9\u306e\u78ba\u8a8d\u30b3\u30fc\u30c9<\/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=\"\">public class SLF4JCheck {\n    public static void main(String[] args) {\n        try {\n            \/\/ LoggerFactory\u306e\u5b58\u5728\u78ba\u8a8d\n            Class.forName(\"org.slf4j.LoggerFactory\");\n            System.out.println(\"SLF4J API is present\");\n\n            \/\/ \u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u306e\u78ba\u8a8d\n            org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(SLF4JCheck.class);\n            logger.info(\"Logger is working properly\");\n        } catch (ClassNotFoundException e) {\n            System.err.println(\"SLF4J API is missing: \" + e.getMessage());\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-44\">\u30ed\u30b0\u304c\u51fa\u529b\u3055\u308c\u306a\u3044\u5834\u5408\u306e\u30c7\u30d0\u30c3\u30b0\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-45\">1. \u30b7\u30b9\u30c6\u30de\u30c6\u30a3\u30c3\u30af\u306a\u30c1\u30a7\u30c3\u30af\u624b\u9806<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u78ba\u8a8d<\/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=\"\">&lt;!-- logback.xml --&gt;\n&lt;configuration&gt;\n    &lt;!-- \u30c7\u30d0\u30c3\u30b0\u30e2\u30fc\u30c9\u306e\u6709\u52b9\u5316 --&gt;\n    &lt;statusListener class=\"ch.qos.logback.core.status.OnConsoleStatusListener\" \/&gt;\n\n    &lt;!-- \u30eb\u30fc\u30c8\u30ed\u30ac\u30fc\u306e\u30ec\u30d9\u30eb\u78ba\u8a8d --&gt;\n    &lt;root level=\"DEBUG\"&gt;\n        &lt;appender-ref ref=\"CONSOLE\" \/&gt;\n    &lt;\/root&gt;\n\n    &lt;!-- \u7279\u5b9a\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30ec\u30d9\u30eb\u78ba\u8a8d --&gt;\n    &lt;logger name=\"com.example\" level=\"DEBUG\" \/&gt;\n&lt;\/configuration&gt;<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30a2\u30da\u30f3\u30c0\u30fc\u306e\u8a2d\u5b9a\u78ba\u8a8d<\/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=\"\">public class LoggerCheck {\n    private static final Logger logger = LoggerFactory.getLogger(LoggerCheck.class);\n\n    public static void checkLogger() {\n        \/\/ \u5404\u30ed\u30b0\u30ec\u30d9\u30eb\u3067\u306e\u30c6\u30b9\u30c8\u51fa\u529b\n        logger.trace(\"Trace message\");\n        logger.debug(\"Debug message\");\n        logger.info(\"Info message\");\n        logger.warn(\"Warn message\");\n        logger.error(\"Error message\");\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u6a29\u9650\u306e\u78ba\u8a8d\u30b3\u30fc\u30c9<\/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=\"\">public class FilePermissionCheck {\n    private static final Logger logger = LoggerFactory.getLogger(FilePermissionCheck.class);\n\n    public static void checkLogFilePermissions(String logPath) {\n        File logFile = new File(logPath);\n        File logDir = logFile.getParentFile();\n\n        \/\/ \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u5b58\u5728\u78ba\u8a8d\n        if (!logDir.exists()) {\n            logger.error(\"Log directory does not exist: {}\", logDir.getAbsolutePath());\n            return;\n        }\n\n        \/\/ \u66f8\u304d\u8fbc\u307f\u6a29\u9650\u306e\u78ba\u8a8d\n        if (!logDir.canWrite()) {\n            logger.error(\"No write permission for log directory: {}\", \n                logDir.getAbsolutePath());\n            return;\n        }\n\n        \/\/ \u30d5\u30a1\u30a4\u30eb\u4f5c\u6210\u30c6\u30b9\u30c8\n        try {\n            if (!logFile.exists()) {\n                boolean created = logFile.createNewFile();\n                if (!created) {\n                    logger.error(\"Could not create log file: {}\", \n                        logFile.getAbsolutePath());\n                    return;\n                }\n            }\n            logger.info(\"Log file permissions check passed\");\n        } catch (IOException e) {\n            logger.error(\"Error checking log file permissions\", e);\n        }\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-46\">2. \u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h4>\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 LoggingTroubleshooter {\n    private static final Logger logger = LoggerFactory.getLogger(LoggingTroubleshooter.class);\n\n    public static void performDiagnostics() {\n        \/\/ 1. \u30af\u30e9\u30b9\u30d1\u30b9\u306e\u78ba\u8a8d\n        checkClasspath();\n\n        \/\/ 2. \u30ed\u30b0\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u78ba\u8a8d\n        checkConfigFile();\n\n        \/\/ 3. \u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u78ba\u8a8d\n        checkLogLevels();\n\n        \/\/ 4. \u30a2\u30da\u30f3\u30c0\u30fc\u306e\u78ba\u8a8d\n        checkAppenders();\n    }\n\n    private static void checkClasspath() {\n        try {\n            \/\/ SLF4J API\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u78ba\u8a8d\n            Package slf4jPackage = LoggerFactory.class.getPackage();\n            logger.info(\"SLF4J API version: {}\", slf4jPackage.getImplementationVersion());\n\n            \/\/ \u5b9f\u88c5\u306e\u78ba\u8a8d\n            Logger logbackLogger = LoggerFactory.getLogger(LoggingTroubleshooter.class);\n            logger.info(\"Logger implementation: {}\", \n                logbackLogger.getClass().getName());\n        } catch (Exception e) {\n            System.err.println(\"Error checking classpath: \" + e.getMessage());\n        }\n    }\n\n    private static void checkConfigFile() {\n        URL configUrl = LoggingTroubleshooter.class\n            .getClassLoader()\n            .getResource(\"logback.xml\");\n\n        if (configUrl != null) {\n            logger.info(\"Found configuration file at: {}\", configUrl);\n        } else {\n            logger.warn(\"No configuration file found in classpath\");\n        }\n    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<strong>\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>[ ] \u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u3055\u308c\u305f\u30ed\u30b0\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>[ ] \u9069\u5207\u306a\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u9078\u629e<\/li>\n\n\n\n<li>[ ] \u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u60c5\u5831\u306e\u9069\u5207\u306a\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<p>\u2705 <strong>\u904b\u7528\u7ba1\u7406<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>[ ] \u5b9a\u671f\u7684\u306a\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3<\/li>\n\n\n\n<li>[ ] \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u76e3\u67fb\u30ed\u30b0\u306e\u5206\u96e2<\/li>\n\n\n\n<li>[ ] \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-50\">\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u65e2\u5b58\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3078\u306e\u5c0e\u5165<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u73fe\u5728\u306e\u30ed\u30b0\u5b9f\u88c5\u306e\u8abf\u67fb<\/li>\n\n\n\n<li>\u6bb5\u968e\u7684\u306a\u79fb\u884c\u8a08\u753b\u306e\u4f5c\u6210<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u5185\u3067\u306e\u904b\u7528\u30eb\u30fc\u30eb\u306e\u7b56\u5b9a<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30ed\u30b0\u7ba1\u7406\u306e\u9ad8\u5ea6\u5316<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u96c6\u4e2d\u30ed\u30b0\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3068\u306e\u9023\u643a<\/li>\n\n\n\n<li>\u30ed\u30b0\u5206\u6790\u57fa\u76e4\u306e\u69cb\u7bc9<\/li>\n\n\n\n<li>\u30a2\u30e9\u30fc\u30c8\u8a2d\u5b9a\u306e\u6700\u9069\u5316<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u7d99\u7d9a\u7684\u306a\u6539\u5584<\/strong>\n<ul 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Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; 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