一个log4j.xml配置文件

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

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

 <appender name="appender1" class="org.apache.log4j.RollingFileAppender">
      <param name="File" value="../logs/normal.log"/>
      <param name="Append" value="true"/>
       <param name="Threshold" value="INFO" />
       <param name="MaxFileSize" value="1KB" />
    <param name="MaxBackupIndex" value="4" />
      <layout class="org.apache.log4j.PatternLayout">
         <param name="ConversionPattern" value="%d %-5p [%c] %m%n" />
      </layout>
   </appender>
<appender name="appender2" class="org.apache.log4j.FileAppender">
      <param name="File" value="../errorlogs/error.log"/>
      <param name="Append" value="true"/>
       <param name="Threshold" value="ERROR" />
      <layout class="org.apache.log4j.PatternLayout">
         <param name="ConversionPattern" value="%d %-5p [%c] %m%n" />
      </layout>
   </appender>

 

   <category  name="com">-----error的级别要高一点,否则错误日志不能输出
      <priority value ="ERROR"/>
      <appender-ref ref="appender2"/>
   </category>
   <category  name="com.abcd">
    <priority value ="INFO"/>----当error出现时,可以同时记入两个日志,info级别的和error级别的
      <appender-ref ref="appender1"/>
   </category>
  
 </log4j:configuration>