web.xml日志监听器
<listener>
??<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<context-param>
??<param-name>log4jConfigLocation</param-name>
??<param-value>WEB-INF/classes/log4j-commonService.properties</param-value>
</context-param>
<context-param>
??<param-name>log4jRefreshInterval</param-name>
??<param-value>50000</param-value>
</context-param>
<context-param>
??<param-name>log4jExposeWebAppRoot</param-name>
??<param-value>true</param-value>
</context-param>
<context-param>
??<param-name>webAppRootKey</param-name>
??<param-value>commonService.root</param-value>
</context-param>
