Caused by: java.lang.IllegalArgumentException: Filter mapping specifies an unknown filter name strut

http://www.iteye.com/problems/49534

java.lang.IllegalArgumentException: Filter mapping specifies an unknown filter name struts2 

非法参数 ，struts2的过滤器有问题，还有就是看看struts2的jar全吗？ 

参考： 
<!-- 配置Struts2 --> 
    <filter> 
        <filter-name>struts2</filter-name> 
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> 
    </filter> 

    <filter-mapping> 
        <filter-name>struts2</filter-name> 
        <url-pattern>/*</url-pattern> 
    </filter-mapping>