{"id":26657,"date":"2024-03-17T07:43:36","date_gmt":"2024-03-16T22:43:36","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/log4j%e3%81%a7%e8%a4%87%e6%95%b0%e3%81%ae%e3%83%ad%e3%82%b0%e3%82%92%e6%9b%b8%e3%81%8f%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86%e3%81%99%e3%82%8c%e3%81%b0%e3%81%84%e3%81%84%e3%81%a7%e3%81%99%e3%81%8b\/"},"modified":"2024-03-22T14:22:53","modified_gmt":"2024-03-22T05:22:53","slug":"log4j%e3%81%a7%e8%a4%87%e6%95%b0%e3%81%ae%e3%83%ad%e3%82%b0%e3%82%92%e6%9b%b8%e3%81%8f%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86%e3%81%99%e3%82%8c%e3%81%b0%e3%81%84%e3%81%84%e3%81%a7%e3%81%99%e3%81%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/log4j%e3%81%a7%e8%a4%87%e6%95%b0%e3%81%ae%e3%83%ad%e3%82%b0%e3%82%92%e6%9b%b8%e3%81%8f%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86%e3%81%99%e3%82%8c%e3%81%b0%e3%81%84%e3%81%84%e3%81%a7%e3%81%99%e3%81%8b\/","title":{"rendered":"log4j\u3067\u8907\u6570\u306e\u30ed\u30b0\u3092\u66f8\u304f\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f"},"content":{"rendered":"

Log4j\u3067\u306f\u3001\u8907\u6570\u306eLogger\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u69cb\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u306e\u30ed\u30b0\u3092\u66f8\u304d\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u6700\u521d\u306b\u3001log4j\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\uff08\u901a\u5e38\u306flog4j.properties\u307e\u305f\u306flog4j.xml\uff09\u3092\u958b\u304d\u3001\u8907\u6570\u306eLogger\u306e\u8a2d\u5b9a\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u305f\u3081\u306e1\u3064\u306eLogger\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u305f\u3081\u306e\u3082\u30461\u3064\u306eLogger\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

log4j.rootLogger\u306f\u3001INFO\u3001console\u3001file\u306e3\u3064\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n

\u30ed\u30b0\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b<\/h1>\n

log4j.appender.console=org.apache.log4j.ConsoleAppender
\nlog4j.appender.console.Target=System.out
\nlog4j.appender.console.layout=org.apache.log4j.PatternLayout
\nlog4j.appender.console.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L – %m%n<\/p>\n

\u30ed\u30b04j\u30a2\u30da\u30f3\u30c0\u30fc.console=org.apache.log4j.ConsoleAppender
\n\u30ed\u30b04j\u30a2\u30da\u30f3\u30c0\u30fc.console.Target=System.out
\n\u30ed\u30b04j\u30a2\u30da\u30f3\u30c0\u30fc.console.layout=org.apache.log4j.PatternLayout
\n\u30ed\u30b04j\u30a2\u30da\u30f3\u30c0\u30fc.console.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L – %m%n<\/p>\n

\u65e5\u5fd7\u306e\u30d5\u30a1\u30a4\u30eb\u51fa\u529b<\/h1>\n

log4j.appender.file=org.apache.log4j.RollingFileAppender
\nlog4j.appender.file.File=\/path\/to\/log\/file.log
\nlog4j.appender.file.MaxFileSize=5MB
\nlog4j.appender.file.MaxBackupIndex=10
\nlog4j.appender.file.layout=org.apache.log4j.PatternLayout
\nlog4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L – %m%n<\/p>\n

\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u51fa\u529b\u8a2d\u5b9a\uff1a
\nlog4j.appender.file=org.apache.log4j.RollingFileAppender
\nlog4j.appender.file.File=\/path\/to\/log\/file.log
\nlog4j.appender.file.MaxFileSize=5MB
\nlog4j.appender.file.MaxBackupIndex=10
\nlog4j.appender.file.layout=org.apache.log4j.PatternLayout
\nlog4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L – %m%n<\/p>\n

Java\u30b3\u30fc\u30c9\u5185\u3067\u3001Logger.getLogger\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u7570\u306a\u308bLogger\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3057\u3001\u7570\u306a\u308b\u30ed\u30b0\u30ec\u30d9\u30eb\u3067\u30ed\u30b0\u3092\u66f8\u304d\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30b3\u30f3\u30bd\u30fc\u30eb\u30ed\u30b0\u3068\u30d5\u30a1\u30a4\u30eb\u30ed\u30b0\u3092\u305d\u308c\u305e\u308c\u66f8\u304d\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n

import org.apache.log4j.Logger; -> org.apache.log4j.Logger\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b;<\/p>\n

Log4jExample\u3068\u3044\u3046\u30af\u30e9\u30b9\u306b\u306f\u3001consoleLogger\u3068fileLogger\u3068\u3044\u3046\u540d\u524d\u3067\u5b9a\u7fa9\u3055\u308c\u305fstatic\u306aLogger\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

public static void main(String[] args) {\r\n    consoleLogger.info(\"This is a console log message\");\r\n    fileLogger.error(\"This is a file log message\");\r\n}\r\n<\/code><\/pre>\n
\u79c1\u306f\u65e5\u672c\u8a9e\u3067\u81ea\u7136\u306b\u4ee5\u4e0b\u3092\u8a00\u3044\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u4e0a\u8a18\u306e\u8a2d\u5b9a\u3068\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30f3\u30bd\u30fc\u30eb\u3068\u30d5\u30a1\u30a4\u30eb\u306e\u4e21\u65b9\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3067\u304d\u307e\u3059\u3002\u6ce8\u610f\u3059\u3079\u304d\u306f\u3001\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3067\u30b3\u30f3\u30bd\u30fc\u30eb\u3068\u30d5\u30a1\u30a4\u30eb\u306eAppender\u3092\u305d\u308c\u305e\u308c\u8a2d\u5b9a\u3057\u3001\u7570\u306a\u308bLogger\u540d\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u3067\u3059\u3002Java\u30b3\u30fc\u30c9\u3067\u306f\u3001Logger.getLogger\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5bfe\u5fdc\u3059\u308bLogger\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3057\u3001\u7570\u306a\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30ed\u30b0\u3092\u66f8\u304d\u8fbc\u3080\u3060\u3051\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Log4j\u3067\u306f\u3001\u8907\u6570\u306eLogger\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u69cb\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u306e\u30ed\u30b0\u3092\u66f8\u304d\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u6700\u521d\u306b\u3001log4j\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\uff08\u901a\u5e38\u306flog4j.properties\u307e\u305f\u306flog4j.xml\uff09\u3092\u958b\u304d\u3001\u8907\u6570\u306eLog […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-26657","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nlog4j\u3067\u8907\u6570\u306e\u30ed\u30b0\u3092\u66f8\u304f\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\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\u3067\u8907\u6570\u306e\u30ed\u30b0\u3092\u66f8\u304f\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"log4j\u3067\u8907\u6570\u306e\u30ed\u30b0\u3092\u66f8\u304f\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f\" \/>\n<meta property=\"og:description\" content=\"Log4j\u3067\u306f\u3001\u8907\u6570\u306eLogger\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u69cb\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u306e\u30ed\u30b0\u3092\u66f8\u304d\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u6700\u521d\u306b\u3001log4j\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\uff08\u901a\u5e38\u306flog4j.properties\u307e\u305f\u306flog4j.xml\uff09\u3092\u958b\u304d\u3001\u8907\u6570\u306eLog […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/log4j\u3067\u8907\u6570\u306e\u30ed\u30b0\u3092\u66f8\u304f\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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