{"id":736,"date":"2023-09-09T18:11:39","date_gmt":"2023-10-07T13:00:47","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/log4j-%e6%97%a5%e5%bf%97%e7%ba%a7%e5%88%ab%e7%a4%ba%e4%be%8b-%e6%8e%92%e5%ba%8f%ef%bc%8c%e4%bc%98%e5%85%88%e7%ba%a7%ef%bc%8c%e8%87%aa%e5%ae%9a%e4%b9%89%e8%bf%87%e6%bb%a4%e5%99%a8\/"},"modified":"2025-08-03T05:34:36","modified_gmt":"2025-08-02T21:34:36","slug":"log4j-%e6%97%a5%e5%bf%97%e7%ba%a7%e5%88%ab%e7%a4%ba%e4%be%8b-%e6%8e%92%e5%ba%8f%ef%bc%8c%e4%bc%98%e5%85%88%e7%ba%a7%ef%bc%8c%e8%87%aa%e5%ae%9a%e4%b9%89%e8%bf%87%e6%bb%a4%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/log4j-%e6%97%a5%e5%bf%97%e7%ba%a7%e5%88%ab%e7%a4%ba%e4%be%8b-%e6%8e%92%e5%ba%8f%ef%bc%8c%e4%bc%98%e5%85%88%e7%ba%a7%ef%bc%8c%e8%87%aa%e5%ae%9a%e4%b9%89%e8%bf%87%e6%bb%a4%e5%99%a8\/","title":{"rendered":"Log4j\u65e5\u5fd7\u7ea7\u522b\u5b8c\u5168\u6307\u5357\uff1a\u6392\u5e8f\u3001\u4f18\u5148\u7ea7\u4e0e\u81ea\u5b9a\u4e49\u8fc7\u6ee4\u5668\u8be6\u89e3"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aLog4j \u65e5\u5fd7\u7ea7\u522b\u793a\u4f8b &#8211; \u6392\u5e8f\uff0c\u4f18\u5148\u7ea7\uff0c\u81ea\u5b9a\u4e49\u8fc7\u6ee4\u5668\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5185\u5bb9\u7247\u6bb5: \u5982\u679c\u4f60\u4f7f\u7528\u8fc7Log4j\uff0c\u4f60\u4f1a\u6ce8\u610f\u5230\u6709\u8bb8\u591a\u65b9\u6cd5\u6765\u8bb0\u5f55\u6d88\u606f\u3002\u4f8b\u5982\uff1a<\/p>\n<pre class=\"post-pre\"><code>logger.trace(\"\u6211\u7684\u65e5\u5fd7\u6d88\u606f\");\r\nlogger.debug(\"\u6211\u7684\u65e5\u5fd7\u6d88\u606f\");\r\nlogger.info(\"\u6211\u7684\u65e5\u5fd7\u6d88\u606f\");\r\n<\/code><\/pre>\n<p>\u5b9e\u9645\u4e0a\u5b83\u4eec\u5bf9\u5e94\u4e8eLog4j\u7684\u65e5\u5fd7\u7ea7\u522b\u3002<\/p>\n<h3>Log4j \u65e5\u5fd7\u7ea7\u522b<\/h3>\n<p>Log4j\u63d0\u4f9b\u4e86\u591a\u79cd\u65e5\u5fd7\u7ea7\u522b\u3002\u4ee5\u4e0b\u662f\u5b8c\u6574\u7684\u5217\u8868\uff1a<\/p>\n<ul>\n<li><strong>TRACE\u7ea7\u522b<\/strong>\uff1a\u7528\u4e8e\u6307\u5b9a\u6bd4DEBUG\u7ea7\u522b\u66f4\u7cbe\u7ec6\u7684\u4fe1\u606f\u4e8b\u4ef6\u3002<\/li>\n<li><strong>DEBUG\u7ea7\u522b<\/strong>\uff1a\u7528\u4e8e\u6307\u5b9a\u5bf9\u8c03\u8bd5\u5e94\u7528\u7a0b\u5e8f\u6700\u6709\u7528\u7684\u7cbe\u7ec6\u4fe1\u606f\u4e8b\u4ef6\u3002<\/li>\n<li><strong>INFO\u7ea7\u522b<\/strong>\uff1a\u7528\u4e8e\u6307\u5b9a\u7a81\u51fa\u663e\u793a\u5e94\u7528\u7a0b\u5e8f\u8fdb\u5c55\u7684\u7c97\u7c92\u5ea6\u4fe1\u606f\u6d88\u606f\u3002<\/li>\n<li><strong>WARN\u7ea7\u522b<\/strong>\uff1a\u7528\u4e8e\u6307\u5b9a\u6f5c\u5728\u7684\u6709\u5bb3\u60c5\u51b5\u3002<\/li>\n<li><strong>ERROR\u7ea7\u522b<\/strong>\uff1a\u7528\u4e8e\u6307\u5b9a\u53ef\u80fd\u4ecd\u7136\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u7ee7\u7eed\u8fd0\u884c\u7684\u9519\u8bef\u4e8b\u4ef6\u3002<\/li>\n<li><strong>FATAL\u7ea7\u522b<\/strong>\uff1a\u7528\u4e8e\u6307\u5b9a\u975e\u5e38\u4e25\u91cd\u7684\u9519\u8bef\u4e8b\u4ef6\uff0c\u53ef\u80fd\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u4e2d\u6b62\u3002<\/li>\n<li><strong>ALL\u7ea7\u522b<\/strong>\uff1a\u5177\u6709\u6700\u4f4e\u7684\u4f18\u5148\u7ea7\uff0c\u65e8\u5728\u5f00\u542f\u6240\u6709\u65e5\u5fd7\u8bb0\u5f55\u3002<\/li>\n<li><strong>OFF\u7ea7\u522b<\/strong>\uff1a\u5177\u6709\u6700\u9ad8\u7684\u4f18\u5148\u7ea7\uff0c\u65e8\u5728\u5173\u95ed\u65e5\u5fd7\u8bb0\u5f55\u3002<\/li>\n<\/ul>\n<p>ALL\u548cOFF\u662f\u7279\u6b8a\u7684\u65e5\u5fd7\u7ea7\u522b\uff0c\u5e94\u8be5\u5728\u6781\u7aef\u60c5\u51b5\u4e0b\u4f7f\u7528\u3002\u6211\u4e2a\u4eba\u4ece\u672a\u5728\u4efb\u4f55\u9879\u76ee\u4e2d\u4f7f\u7528\u8fc7\u5b83\u4eec\u3002<\/p>\n<h3>Log4j\u7684\u7ea7\u522b\u987a\u5e8f\/\u4f18\u5148\u7ea7<\/h3>\n<p>Trace\uff08\u8ddf\u8e2a\uff09\u7684\u4f18\u5148\u7ea7\u6700\u4f4e\uff0c\u800cFatal\uff08\u81f4\u547d\uff09\u7684\u4f18\u5148\u7ea7\u6700\u9ad8\u3002\u4ee5\u4e0b\u662fLog4j\u7684\u65e5\u5fd7\u7ea7\u522b\u987a\u5e8f\uff1a<\/p>\n<p>TRACE &lt; DEBUG &lt; INFO &lt; WARN &lt; ERROR &lt; FATAL<\/p>\n<p>\u5f53\u6211\u4eec\u5b9a\u4e49\u65e5\u5fd7\u5668\u7ea7\u522b\u65f6\uff0c\u4efb\u4f55\u5177\u6709\u66f4\u9ad8\u4f18\u5148\u7ea7\u7684\u65e5\u5fd7\u4e5f\u4f1a\u88ab\u6253\u5370\u51fa\u6765\u3002\u4f8b\u5982\uff0c\u5982\u679c\u65e5\u5fd7\u5668\u7ea7\u522b\u8bbe\u7f6e\u4e3aINFO\uff0c\u5219DEBUG\u65e5\u5fd7\u5c06\u4e0d\u4f1a\u88ab\u6253\u5370\u51fa\u6765\uff0c\u4f46WARN\u65e5\u5fd7\u4f1a\u56e0\u4e3a\u5177\u6709\u66f4\u9ad8\u4f18\u5148\u7ea7\u800c\u88ab\u6253\u5370\u51fa\u6765\u3002<\/p>\n<h3>Log4j \u8fc7\u6ee4\u5668<\/h3>\n<p>\u5047\u8bbe\u6211\u4eec\u53ea\u60f3\u8bb0\u5f55INFO\uff08\u4fe1\u606f\uff09\u548cFATAL\uff08\u81f4\u547d\uff09\u7ea7\u522b\u7684\u4e8b\u4ef6\uff0c\u800c\u4e0d\u8bb0\u5f55WARN\uff08\u8b66\u544a\uff09\u548cERROR\uff08\u9519\u8bef\uff09\u7ea7\u522b\u7684\u4e8b\u4ef6\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528Log4j\u7684\u8fc7\u6ee4\u5668\uff08Filter\uff09\u6765\u5b9e\u73b0\u3002\u6211\u4eec\u53ef\u4ee5\u6269\u5c55<code>org.apache.log4j.spi.Filter<\/code>\u7c7b\uff0c\u5e76\u5b9e\u73b0\u5b83\u7684<code>decide(LoggingEvent event)<\/code>\u65b9\u6cd5\u6765\u63d0\u4f9b\u81ea\u5b9a\u4e49\u7684\u8fc7\u6ee4\u80fd\u529b\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.log4j.filters;\r\n\r\nimport org.apache.log4j.Level;\r\nimport org.apache.log4j.spi.Filter;\r\nimport org.apache.log4j.spi.LoggingEvent;\r\n\r\npublic class MyLog4jFilter extends Filter {\r\n\r\n    \/**\r\n     * \u6211\u81ea\u5b9a\u4e49\u7684\u8fc7\u6ee4\u5668\uff0c\u4ec5\u8bb0\u5f55INFO\u548cFATAL\u7ea7\u522b\u7684\u4e8b\u4ef6\r\n     *\/\r\n    @Override\r\n    public int decide(LoggingEvent event) {\r\n        if(event.getLevel() == Level.INFO || event.getLevel() == Level.FATAL)\r\n            return ACCEPT;\r\n        else return DENY;\r\n    }\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0a\u81ea\u5b9a\u4e49\u8fc7\u6ee4\u5668\u4ec5\u8bb0\u5f55INFO\u548cFATAL\u7ea7\u522b\u7684\u4e8b\u4ef6\uff0c\u4e0b\u9762\u662f\u76f8\u5e94\u7684Log4j XML\u914d\u7f6e\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;?xml version=\"1.0\" encoding=\"UTF-8\"?&gt;\r\n&lt;!DOCTYPE log4j:configuration SYSTEM \"log4j.dtd\"&gt;\r\n\r\n&lt;log4j:configuration xmlns:log4j=\"https:\/\/jakarta.apache.org\/log4j\/\"\r\n    debug=\"false\"&gt;\r\n\r\n    &lt;!-- \u63a7\u5236\u53f0\u9644\u52a0\u5668 --&gt;\r\n    &lt;appender name=\"console\" class=\"org.apache.log4j.ConsoleAppender\"&gt;\r\n        &lt;param name=\"Target\" value=\"System.out\" \/&gt;\r\n        &lt;layout class=\"org.apache.log4j.PatternLayout\"&gt;\r\n            &lt;param name=\"ConversionPattern\" value=\"%-5p %c{1} - %m%n\" \/&gt;\r\n        &lt;\/layout&gt;\r\n        &lt;filter class=\"com.Olivia.log4j.filters.MyLog4jFilter\" \/&gt;\r\n    &lt;\/appender&gt;\r\n\r\n    &lt;logger name=\"com.Olivia.log4j\" additivity=\"false\"&gt;\r\n        &lt;level value=\"TRACE\" \/&gt;\r\n        &lt;appender-ref ref=\"console\" \/&gt;\r\n    &lt;\/logger&gt;\r\n\r\n    &lt;root&gt;\r\n        &lt;priority value=\"DEBUG\" \/&gt;\r\n        &lt;appender-ref ref=\"console\" \/&gt;\r\n    &lt;\/root&gt;\r\n\r\n&lt;\/log4j:configuration&gt;\r\n<\/code><\/pre>\n<p>\u8bf7\u6ce8\u610f\u63a7\u5236\u53f0\u9644\u52a0\u5668\uff08appender\uff09\u4e2dFilter\u7c7b\u7684\u4f7f\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u7c7b\uff0c\u7528\u4e8e\u8fdb\u884c\u57fa\u672c\u7684\u65e5\u5fd7\u8bb0\u5f55\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.log4j.main;\r\n\r\nimport org.apache.log4j.Logger;\r\nimport org.apache.log4j.PropertyConfigurator;\r\nimport org.apache.log4j.xml.DOMConfigurator;\r\n\r\npublic class Log4jExample {\r\n\r\n    static {\r\n        init();\r\n    }\r\n\r\n    private final static Logger logger = Logger.getLogger(Log4jExample.class);\r\n\r\n    public static void main(String[] args) {\r\n        logger.trace(\"\u6211\u7684\u8ddf\u8e2a\u65e5\u5fd7\");\r\n        logger.debug(\"\u6211\u7684\u8c03\u8bd5\u65e5\u5fd7\");\r\n        logger.info(\"\u6211\u7684\u4fe1\u606f\u65e5\u5fd7\");\r\n        logger.warn(\"\u6211\u7684\u8b66\u544a\u65e5\u5fd7\");\r\n        logger.error(\"\u6211\u7684\u9519\u8bef\u65e5\u5fd7\");\r\n        logger.fatal(\"\u6211\u7684\u81f4\u547d\u65e5\u5fd7\");\r\n    }\r\n\r\n    \/**\r\n     * \u521d\u59cb\u5316Log4j\u914d\u7f6e\u7684\u65b9\u6cd5\r\n     *\/\r\n    private static void init() {\r\n        DOMConfigurator.configure(\"log4j.xml\");\r\n    }\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u8fd0\u884c\u6b64\u7a0b\u5e8f\u65f6\uff0c\u4f1a\u5728\u63a7\u5236\u53f0\u751f\u6210\u4ee5\u4e0b\u65e5\u5fd7\uff1a<\/p>\n<pre class=\"post-pre\"><code>INFO  Log4jExample - \u6211\u7684\u4fe1\u606f\u65e5\u5fd7\r\nFATAL Log4jExample - \u6211\u7684\u81f4\u547d\u65e5\u5fd7\r\n<\/code><\/pre>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u81ea\u5b9a\u4e49\u7684\u8fc7\u6ee4\u5668\u7c7b\u6765\u8fdb\u884c\u66f4\u590d\u6742\u7684\u8fc7\u6ee4\u3002\u8bf7\u6ce8\u610f\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u9644\u52a0\u5668\u4e2d\u663e\u793a\u7684<code>org.apache.log4j.varia.LevelMatchFilter<\/code>\u548c<code>org.apache.log4j.varia.DenyAllFilter<\/code>\u7c7b\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;appender name=\"console\" class=\"org.apache.log4j.ConsoleAppender\"&gt;\r\n    &lt;param name=\"Target\" value=\"System.out\" \/&gt;\r\n    &lt;layout class=\"org.apache.log4j.PatternLayout\"&gt;\r\n        &lt;param name=\"ConversionPattern\" value=\"%-5p %c{1} - %m%n\" \/&gt;\r\n    &lt;\/layout&gt;\r\n    &lt;filter class=\"org.apache.log4j.varia.LevelMatchFilter\"&gt;\r\n        &lt;param name=\"LevelToMatch\" value=\"INFO\" \/&gt;\r\n        &lt;param name=\"AcceptOnMatch\" value=\"true\" \/&gt;\r\n    &lt;\/filter&gt;\r\n    &lt;filter class=\"org.apache.log4j.varia.LevelMatchFilter\"&gt;\r\n        &lt;param name=\"LevelToMatch\" value=\"FATAL\" \/&gt;\r\n        &lt;param name=\"AcceptOnMatch\" value=\"true\" \/&gt;\r\n    &lt;\/filter&gt;\r\n    &lt;filter class=\"org.apache.log4j.varia.DenyAllFilter\"\/&gt;\r\n&lt;\/appender&gt;\r\n<\/code><\/pre>\n<p>\u6211\u4eec\u8fd8\u6709\u4e00\u4e2a\u53ef\u4ee5\u7528\u6765\u62d2\u7edd\u4f18\u5148\u7ea7\u8d85\u51fa\u7279\u5b9a\u8303\u56f4\u7684\u6d88\u606f\u7684<code>org.apache.log4j.varia.LevelRangeFilter<\/code>\u7c7b\u3002\u4ee5\u4e0a\u5c31\u662f\u5173\u4e8eLog4j\u65e5\u5fd7\u7ea7\u522b\u548c\u8fc7\u6ee4\u5668\u7684\u7b80\u8981\u4ecb\u7ecd\u3002<\/p>\n<h4>\u53c2\u8003\u8d44\u6599\uff1a<\/h4>\n<ul class=\"post-ul\">\n<li>Log4j\u7ea7\u522bAPI\u6587\u6863<\/li>\n<li>Log4j\u81ea\u5b9a\u4e49\u8fc7\u6ee4\u5668 &#8211; StackOverflow<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aLog4j \u65e5\u5fd7\u7ea7\u522b\u793a\u4f8b &#8211; \u6392\u5e8f\uff0c\u4f18\u5148\u7ea7\uff0c\u81ea\u5b9a\u4e49\u8fc7\u6ee4\u5668\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002 \u5185\u5bb9 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