服务器运行时修改log4j的输出级别后，不需要重启服务器。

<context-param>

<param-name>log4jConfigLocation </param-name>

<param-value>/WEB-INF/classes/log4j.properties </param-value>

</context-param>

 

<context-param>

<param-name>log4jRefreshInterval </param-name>

<param-value>6000 </param-value>

</context-param>

 

 

<listener>

<listener-class>org.springframework.web.util.Log4jConfigListener

</listener-class>

</listener>