简单的问题，但是找了半天找不到啊.....

struts.xml   (src 目录下)
<struts>
<package name="strutspackage" extends="struts-default">
<action name="user" class="com.gridedu.action.UserAction">
<result>/index.jsp</result>
</action>
    </package>
</struts>

localhost/gridedu/user.action
访问出错：

type Status report
message There is no Action mapped for namespace / and action name user.

description The requested resource (There is no Action mapped for namespace / and action name user.) is not available.

web.xml  (整合了spring)

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
    </filter>

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

错误代码:

There is no Action mapped for namespace / and action name user. - [unknown location]
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:186)
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:41)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:494)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:422)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:306)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:323)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1719)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)

用ssh用了一两个月从没出现这样的问题，找了半天没辙了，求哪位大哥救命啊.... --------------------编程问答-------------------- 如果你用的是Struts2试一试在web.xml中
<filter>
    <filter-name>struts2</filter-name>
     <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
--------------------编程问答-------------------- 你加点东西了。
<package name="strutspackage" extends="struts-default" namespace="/">
<action name="user" class="com.gridedu.action.UserAction">
<result>/index.jsp</result>
</action>
  </package>

补充：Java ,  Java EE