struts2配置log4j
<interceptor-ref name="defaultStack">

<param name="exception.logEnabled">true</param>

<param name="exception.logLevel">error</param>

</interceptor-ref>

<package name="default" extends="struts-default"> <interceptor-stack name="defaultStack"> <interceptor-ref name="timer"/> <interceptor-ref name="logger"/> <interceptor-ref name="exception"> <param name="logEnabled">true</param> <param name="logCategory">error.unhandled</param> <param name="logLevel">WARN</param> </interceptor-ref> </interceptor-stack> </package>