试试这是属性文件的例子：
log4j.rootLogger=DEBUG, CONSOLE# Each package has different appender name log4j.logger.com.mycorp.project.first=DEBUG, FIRSTlog4j.logger.com.mycorp.project.second=DEBUG, SECONDlog4j.appender.FIRST=org.apache.log4j.RollingFileAppenderlog4j.appender.FIRST.File=./first.loglog4j.appender.FIRST.layout=org.apache.log4j.PatternLayoutlog4j.appender.SECOND=org.apache.log4j.RollingFileAppenderlog4j.appender.SECOND.File=./second.loglog4j.appender.SECOND.layout=org.apache.log4j.PatternLayout
或对于XML而言（仅突出显示重要部分）：
<!-- FIRST appender definition --><appender name="FIRST" > ...</appender><!-- SECOND appender definition --><appender name="SECOND" > ...</appender><!-- logger package com.mycorp.project.first --><logger name="com.mycorp.project.first"> <level value="DEBUG" /> <appender-ref ref="FIRST"/></logger><!-- logger for package com.mycorp.project.second --><logger name="com.mycorp.project.second"> <level value="DEBUG" /> <appender-ref ref="SECOND"/></logger>
