{"id":29782,"date":"2024-03-18T22:18:17","date_gmt":"2024-03-18T13:18:17","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/log4j%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ab%e3%83%ad%e3%82%b0%e3%82%92%e8%a8%98%e9%8c%b2%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7\/"},"modified":"2024-03-22T21:48:05","modified_gmt":"2024-03-22T12:48:05","slug":"log4j%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ab%e3%83%ad%e3%82%b0%e3%82%92%e8%a8%98%e9%8c%b2%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/log4j%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ab%e3%83%ad%e3%82%b0%e3%82%92%e8%a8%98%e9%8c%b2%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7\/","title":{"rendered":"log4j\u3092\u4f7f\u3063\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"

log4j\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u624b\u9806\u306b\u5f93\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

    \n
  1. \u6700\u521d\u306b\u3001log4j\u306ejar\u30d5\u30a1\u30a4\u30eb\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001log4j\u306ejar\u30d5\u30a1\u30a4\u30eb\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306elib\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u30b3\u30d4\u30fc\u3059\u308b\u304b\u3001\u30d3\u30eb\u30c9\u30c4\u30fc\u30eb\uff08\u4f8b\uff1aMaven\u307e\u305f\u306fGradle\uff09\u3092\u4f7f\u7528\u3057\u3066log4j\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n
  2. \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30ea\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u306blog4j.properties\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3082\u3057log4j\u306exml\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001log4j.xml\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u3089\u306e\u30d5\u30a1\u30a4\u30eb\u306flog4j\u306e\u30ed\u30b0\u51fa\u529b\u65b9\u6cd5\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n
  3. log4j\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3067\u3001\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3059\u308b\u30a2\u30da\u30f3\u30c0\uff08\u30ed\u30ac\u30fc\uff09\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u8a2d\u5b9a\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n
    log4j.rootLogger = DEBUG, FILE\r\n\r\nlog4j.appender.FILE=org.apache.log4j.FileAppender\r\nlog4j.appender.FILE.File=\/path\/to\/logfile.log\r\nlog4j.appender.FILE.layout=org.apache.log4j.PatternLayout\r\nlog4j.appender.FILE.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss} %p [%c{1}] %m%n\r\n<\/code><\/pre>\n
    \u3053\u306e\u8a2d\u5b9a\u3067\u306f\u3001FileAppender\u3092\u4f7f\u7528\u3057\u3066\u30ed\u30b0\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3057\u307e\u3059\u3002 File\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\u3068\u540d\u524d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002 layout\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u30ed\u30b0\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u5f62\u5f0f\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
      \n
    1. import org.apache.log4j.Logger\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
      private static final Logger logger = Logger.getLogger(YourClass.class);\r\n\r\npublic void yourMethod(){\r\n    \/\/ ...\r\n    logger.debug(\"This is a debug message\");\r\n    logger.info(\"This is an info message\");\r\n    logger.error(\"This is an error message\");\r\n    \/\/ ...\r\n}\r\n<\/code><\/pre>\n
      \u3053\u306e\u4f8b\u3067\u306f\u3001Logger\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3001\u7570\u306a\u308b\u30ec\u30d9\u30eb\u306e\u30ed\u30b0\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8a18\u9332\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3057\u305f\u3002<\/p>\n
        \n
      1. \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001log4j\u306f\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u57fa\u3065\u3044\u3066\u30ed\u30b0\u3092\u6307\u5b9a\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
        \u3053\u308c\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30ed\u30b0\u306e\u8a18\u9332\u306blog4j\u3092\u4f7f\u7528\u3059\u308b\u57fa\u672c\u7684\u306a\u624b\u9806\u3067\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001log4j\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u8abf\u6574\u3057\u3066\u3001\u7279\u5b9a\u306e\u8981\u6c42\u306b\u9069\u5408\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        log4j\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u624b\u9806\u306b\u5f93\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u6700\u521d\u306b\u3001log4j\u306ejar\u30d5\u30a1\u30a4\u30eb\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001log4j\u306ejar\u30d5\u30a1\u30a4\u30eb\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306elib\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u30b3\u30d4\u30fc […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-29782","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nlog4j\u3092\u4f7f\u3063\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f - 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\u3092\u4f7f\u3063\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"log4j\u3092\u4f7f\u3063\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\" \/>\n<meta property=\"og:description\" content=\"log4j\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u624b\u9806\u306b\u5f93\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u6700\u521d\u306b\u3001log4j\u306ejar\u30d5\u30a1\u30a4\u30eb\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001log4j\u306ejar\u30d5\u30a1\u30a4\u30eb\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306elib\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u30b3\u30d4\u30fc […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/log4j\u3092\u4f7f\u3063\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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