web项目的web.xml配置问题,完成.action 和.ini 的重写    <filter>
     <filter-name>HttpProxyFilter</filter-name>
     <display-name>HttpProxyFilter</display-name>
     <filter-class>com.filter.HttpProxyFilter</filter-class>
    </filter>
   <filter-mapping>
    <filter-name>HttpProxyFilter</filter-name>
    <url-pattern>*.action</url-pattern>
   </filter-mapping>
   <filter-mapping>
    <filter-name>HttpProxyFilter</filter-name>
    <url-pattern>*.in</url-pattern>
   </filter-mapping>
com.filter.HttpProxyFilter 如何重写给个思路