如何为不同的ant任务提供自定义log4j.xml？

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
  <appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender">
   <layout class="org.apache.log4j.PatternLayout">
     <param name="ConversionPattern" value="%d{ABSOLUTE} %-5p [%c{1}] %m%n"/>
    </layout>
  </appender>

 <logger name="com.example.ant.task1" additivity="false">
   <level value="info"/>
    <appender-ref ref="consoleAppender"/>
  </logger>

 <logger name="com.example.ant.task2" additivity="false">
   <level value="debug"/>
    <appender-ref ref="consoleAppender"/>
  </logger>

  <root>
    <priority value="info"/>
    <appender-ref ref="consoleAppender"/>
  </root>
</log4j:configuration>

<taskdef name="task1" classname="com.example.ant.task1" classpath="path/to/your/task1.jar"/>
<taskdef name="task2" classname="com.example.ant.task2" classpath="path/to/your/task2.jar"/>

  <task1>
    <log4j>
     <logger name="com.example.ant.task1" level="info"/>
    </log4j>
  </task1>
</target><target name="task2">
  <task2>
    <log4j>
     <logger name="com.example.ant.task2" level="debug"/>
    </log4j>
  </task2>
</target>