使用log4j将不同的日志级别记录到不同的文件中 [英] log different log levels to different files with log4j

问题描述

我正在使用log4j登录我的应用程序.我正在尝试在不同文件中使用不同级别的日志，但是出了点问题.对于解决此问题的任何帮助，我们将不胜感激.

I am using log4j for logging in my applicaion. I am trying to different level logs in different files but something going wrong. Any help regrading this issue will be highly appreciated.

    <?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

<appender name="console" class="org.apache.log4j.ConsoleAppender"> 
    <param name="Target" value="System.out"/> 
    <layout class="org.apache.log4j.PatternLayout"> 
      <param name="ConversionPattern" value="%-5p %c{1} - %m%n"/> 
    </layout> 
</appender> 

<appender name="DEBUG" class="org.apache.log4j.RollingFileAppender">
  <param name="File" value="TCS_patch_9/log/retailer_debug.log" />
  <param name="Threshold" value="DEBUG" />
  <param name="MaxFileSize" value="2MB"/>
  <param name="MaxBackupIndex" value="3"/>
  <layout class="org.apache.log4j.PatternLayout">
    <param name="ConversionPattern" value="%d{ISO8601} %-5p %c - %m%n"/>
  </layout>
</appender>

<appender name="INFO" class="org.apache.log4j.RollingFileAppender">
  <param name="File" value="TCS_patch_9/log/retailer_info.log" />
  <param name="Threshold" value="INFO" />
  <param name="MaxFileSize" value="2MB"/>
  <param name="MaxBackupIndex" value="3"/>
  <layout class="org.apache.log4j.PatternLayout">
    <param name="ConversionPattern" value="%d{ISO8601} %-5p %c - %m%n"/>
  </layout>
</appender>
<appender name="ERROR" class="org.apache.log4j.RollingFileAppender">
  <param name="File" value="TCS_patch_9/log/retailer_error.log" />
  <param name="Threshold" value="ERROR" />
  <param name="MaxFileSize" value="2MB"/>
  <param name="MaxBackupIndex" value="3"/>
  <layout class="org.apache.log4j.PatternLayout">
    <param name="ConversionPattern" value="%d{ISO8601} %-5p %c - %m%n"/>
  </layout>
</appender>
<appender name="FATAL" class="org.apache.log4j.RollingFileAppender">
  <param name="File" value="TCS_patch_9/log/retailer_repeat_delay.log" />
  <param name="Threshold" value="FATAL" />
  <param name="MaxFileSize" value="2MB"/>
  <param name="MaxBackupIndex" value="3"/>
  <layout class="org.apache.log4j.PatternLayout">
    <param name="ConversionPattern" value="%d{ISO8601} %-5p %c - %m%n"/>
  </layout>
</appender>

  <root> 
    <priority value ="error" /> 
    <appender-ref ref="console"/> 
    <appender-ref ref="DEBUG"/> 
    <appender-ref ref="INFO"/> 
    <appender-ref ref="ERROR"/>
    <appender-ref ref="FATAL"/> 
  </root>

</log4j:configuration>

推荐答案

log4j附加程序的标准行为是，它们以阈值级别或更高记录所有消息，即，具有阈值INFO的附加器将记录INFO，WARN，ERROR和FATAL消息，但不记录DEBUG.如果您只想记录 信息消息，而不是WARN及更高版本，则

The standard behaviour for log4j appenders is that they log all messages at their threshold level or higher, i.e. an appender with threshold INFO will log INFO, WARN, ERROR and FATAL messages but not DEBUG. If you want to log only INFO messages but not WARN and above then you need to use a LevelMatchFilter.

您还需要将根记录程序的优先级设置为DEBUG，否则它将仅向其附加程序发送ERROR和FATAL消息，并且DEBUG和INFO文件为空.

You will also need to set your root logger priority to DEBUG, otherwise it will only send ERROR and FATAL messages to its appenders and your DEBUG and INFO files will be empty.

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