{"id":77764,"date":"2024-03-20T18:55:12","date_gmt":"2024-03-20T09:55:12","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/log4j%e3%81%8c%e5%87%ba%e5%8a%9b%e5%86%85%e5%ae%b9%e3%82%92%e3%82%b3%e3%83%b3%e3%82%bd%e3%83%bc%e3%83%ab%e3%81%ab%e8%a1%a8%e7%a4%ba%e3%81%95%e3%81%9b%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f\/"},"modified":"2025-08-11T22:58:53","modified_gmt":"2025-08-11T13:58:53","slug":"log4j%e3%81%8c%e5%87%ba%e5%8a%9b%e5%86%85%e5%ae%b9%e3%82%92%e3%82%b3%e3%83%b3%e3%82%bd%e3%83%bc%e3%83%ab%e3%81%ab%e8%a1%a8%e7%a4%ba%e3%81%95%e3%81%9b%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/log4j%e3%81%8c%e5%87%ba%e5%8a%9b%e5%86%85%e5%ae%b9%e3%82%92%e3%82%b3%e3%83%b3%e3%82%bd%e3%83%bc%e3%83%ab%e3%81%ab%e8%a1%a8%e7%a4%ba%e3%81%95%e3%81%9b%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f\/","title":{"rendered":"log4j\u304c\u51fa\u529b\u5185\u5bb9\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u8868\u793a\u3055\u305b\u308b\u65b9\u6cd5\u306f\uff1f"},"content":{"rendered":"

\u30ed\u30b04j\u306e\u30ed\u30b0\u51fa\u529b\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3059\u308b\u65b9\u6cd5\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n

    \n
  1. log4j\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u3066\u3001\u30eb\u30fc\u30c8\u30ed\u30ac\u30fc\u306e\u51fa\u529b\u5148\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3059\u308b\u3088\u3046\u8a2d\u5b9a\u3059\u308b\u3002log4j.properties\u30d5\u30a1\u30a4\u30eb\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3002<\/li>\n<\/ol>\n
    log4j.rootLogger=DEBUG, Console\r\n\r\nlog4j.appender.Console=org.apache.log4j.ConsoleAppender\r\nlog4j.appender.Console.layout=org.apache.log4j.PatternLayout\r\nlog4j.appender.Console.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n\r\n<\/code><\/pre>\n
      \n
    1. Java\u30b3\u30fc\u30c9\u3067log4j\u3092\u8a2d\u5b9a\u3057\u3066\u30ed\u30ae\u30f3\u30b0\u7d50\u679c\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3059\u308b\u306b\u306f\u3001 Java\u30b3\u30fc\u30c9\u306b\u6b21\u306e\u8a2d\u5b9a\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
      import<\/span> org.apache.log4j.Logger;\r\nimport<\/span> org.apache.log4j.ConsoleAppender;\r\nimport<\/span> org.apache.log4j.PatternLayout;\r\n\r\npublic<\/span> class<\/span> MyClass<\/span> {\r\n    private<\/span> static<\/span> final<\/span> Logger<\/span> logger<\/span> =<\/span> Logger.getLogger(MyClass.class);\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(String[] args)<\/span> {\r\n        ConsoleAppender<\/span> consoleAppender<\/span> =<\/span> new<\/span> ConsoleAppender<\/span>();\r\n        consoleAppender.setLayout(new<\/span> PatternLayout<\/span>(\"%-4r [%t] %-5p %c %x - %m%n\"<\/span>));\r\n        logger.addAppender(consoleAppender);\r\n\r\n        logger.debug(\"Debug message\"<\/span>);\r\n        logger.info(\"Info message\"<\/span>);\r\n        logger.warn(\"Warning message\"<\/span>);\r\n        logger.error(\"Error message\"<\/span>);\r\n    }\r\n}\r\n<\/code><\/pre>\n
      \u3044\u305a\u308c\u306e\u65b9\u6cd5\u3067\u3082\u3001log4j\u306e\u51fa\u529b\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u3078\u51fa\u529b\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u30ed\u30b04j\u306e\u30ed\u30b0\u51fa\u529b\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3059\u308b\u65b9\u6cd5\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002 log4j\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u3066\u3001\u30eb\u30fc\u30c8\u30ed\u30ac\u30fc\u306e\u51fa\u529b\u5148\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3059\u308b\u3088\u3046\u8a2d\u5b9a\u3059\u308b\u3002log4j.properties\u30d5\u30a1\u30a4\u30eb\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3002 lo […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-77764","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"\nlog4j\u304c\u51fa\u529b\u5185\u5bb9\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u8868\u793a\u3055\u305b\u308b\u65b9\u6cd5\u306f\uff1f - 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