{"id":29750,"date":"2024-03-18T22:10:57","date_gmt":"2024-03-18T13:10:57","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/log4j%e3%81%ae%e3%83%80%e3%82%a4%e3%83%8a%e3%83%9f%e3%83%83%e3%82%af%e8%a8%ad%e5%ae%9a%e3%81%a7%e5%87%ba%e5%8a%9b%e3%83%91%e3%82%b9%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e5%ae%9f\/"},"modified":"2024-03-22T21:43:28","modified_gmt":"2024-03-22T12:43:28","slug":"log4j%e3%81%ae%e3%83%80%e3%82%a4%e3%83%8a%e3%83%9f%e3%83%83%e3%82%af%e8%a8%ad%e5%ae%9a%e3%81%a7%e5%87%ba%e5%8a%9b%e3%83%91%e3%82%b9%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e5%ae%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/log4j%e3%81%ae%e3%83%80%e3%82%a4%e3%83%8a%e3%83%9f%e3%83%83%e3%82%af%e8%a8%ad%e5%ae%9a%e3%81%a7%e5%87%ba%e5%8a%9b%e3%83%91%e3%82%b9%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e5%ae%9f\/","title":{"rendered":"log4j\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u8a2d\u5b9a\u3067\u51fa\u529b\u30d1\u30b9\u3092\u3069\u306e\u3088\u3046\u306b\u5b9f\u73fe\u3067\u304d\u307e\u3059\u304b\u3002"},"content":{"rendered":"

log4j\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306a\u8a2d\u5b9a\u51fa\u529b\u30d1\u30b9\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u306f\u3001log4j\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306a\u8a2d\u5b9a\u6a5f\u80fd\u3068\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u64cd\u4f5c\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n

    \n
  1. \u6700\u521d\u306b\u3001log4j\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\uff08\u4f8b\uff1alog4j.properties\uff09\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u305d\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u51fa\u529b\u30d1\u30b9\u3092\u6307\u5b9a\u3057\u307e\u3059\uff08\u4f8b\uff1alog4j.appender.file.File=\/path\/to\/logs\/logfile.log\uff09\u3002<\/li>\n
  2. Java\u306e\u30b3\u30fc\u30c9\u3067\u3001PropertyConfigurator\u3092\u4f7f\u7528\u3057\u3066\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
    import<\/span> org.apache.log4j.Logger;\r\nimport<\/span> org.apache.log4j.PropertyConfigurator;\r\n\r\npublic<\/span> class<\/span> Log4jExample<\/span> {\r\n    private<\/span> static<\/span> final<\/span> Logger<\/span> logger<\/span> =<\/span> Logger.getLogger(Log4jExample.class);\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(String[] args)<\/span> {\r\n        \/\/ \u52a0\u8f7dlog4j\u914d\u7f6e\u6587\u4ef6<\/span>\r\n        PropertyConfigurator.configure(\"log4j.properties\"<\/span>);\r\n        \r\n        \/\/ \u8bbe\u7f6e\u52a8\u6001\u8f93\u51fa\u8def\u5f84<\/span>\r\n        String<\/span> dynamicOutputPath<\/span> =<\/span> \"\/path\/to\/dynamic\/logs\/logfile.log\"<\/span>;\r\n        logger.info(\"Dynamic output path: \"<\/span> + dynamicOutputPath);\r\n        \r\n        \/\/ \u4fee\u6539log4j\u7684\u8f93\u51fa\u8def\u5f84<\/span>\r\n        org.apache.log4j.FileAppender<\/span> fileAppender<\/span> =<\/span> (org.apache.log4j.FileAppender) logger.getAppender(\"file\"<\/span>);\r\n        fileAppender.setFile(dynamicOutputPath);\r\n        fileAppender.activateOptions();\r\n        \r\n        \/\/ \u8f93\u51fa\u65e5\u5fd7<\/span>\r\n        logger.info(\"This log message will be written to the dynamic output path\"<\/span>);\r\n    }\r\n}\r\n<\/code><\/pre>\n
      \n
    1. Java\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001log4j\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u51fa\u529b\u30d1\u30b9\u306b\u30ed\u30b0\u3092\u51fa\u529b\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30b3\u30fc\u30c9\u3092\u4f7f\u3063\u3066log4j\u306e\u51fa\u529b\u30d1\u30b9\u3092\u52d5\u7684\u306b\u5909\u66f4\u3057\u3001\u8a2d\u5b9a\u3092\u518d\u30a2\u30af\u30c6\u30a3\u30d6\u5316\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u30ed\u30b0\u51fa\u529b\u64cd\u4f5c\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u30ed\u30b0\u306f\u52d5\u7684\u51fa\u529b\u30d1\u30b9\u306b\u66f8\u304d\u8fbc\u307e\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n
      \u6ce8\u610f\uff1a\u300cfile\u300d\u3068\u3044\u3046\u30b3\u30fc\u30c9\u306f\u3001log4j.properties\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u30a2\u30da\u30f3\u30c0\u30fc\u306e\u540d\u524d\u3067\u3059\u3002\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3067\u4ed6\u306e\u30a2\u30da\u30f3\u30c0\u30fc\u540d\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u5b9f\u969b\u306e\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u4fee\u6b63\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/log4j\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u8a2d\u5b9a\u3067\u51fa\u529b\u30d1\u30b9\u3092\u3069\u306e\u3088\u3046\u306b\u5b9f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"log4j\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u8a2d\u5b9a\u3067\u51fa\u529b\u30d1\u30b9\u3092\u3069\u306e\u3088\u3046\u306b\u5b9f\u73fe\u3067\u304d\u307e\u3059\u304b\u3002\" \/>\n<meta property=\"og:description\" content=\"log4j\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306a\u8a2d\u5b9a\u51fa\u529b\u30d1\u30b9\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u306f\u3001log4j\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306a\u8a2d\u5b9a\u6a5f\u80fd\u3068\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u64cd\u4f5c\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\uff1a \u6700\u521d\u306b\u3001log4j\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\uff08\u4f8b\uff1alog4j.proper […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/log4j\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u8a2d\u5b9a\u3067\u51fa\u529b\u30d1\u30b9\u3092\u3069\u306e\u3088\u3046\u306b\u5b9f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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