struts配置web.xml提示：配置报错 

StrutsPrepareAndExecuteFilter' is not assignable to 'javax.servlet.Filter

struts配置web.xml提示 org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter' is not assignable to 'javax.servlet.Filter

导入的包和报错情况如下：


项目运行报错 WARNING: Could not find action or result There is no Action mapped for namespace [/] and action name [learn] associated with context path []. - [unknown location] at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185) at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63) at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39) at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:553) at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:879) at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:617) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1778) at java.lang.Thread.run(Thread.java:724)

struts配置如下
    <package name="xxx" extends="struts-default">
    <action name="learn" class="main\java\action\HelloAction" method="execute">
        <result name="success">/success.jsp</result>
    </action>
</package>

HelloAction.java文件如下：
public class HelloAction extends ActionSupport{ @Override public String execute() throws Exception { System.out.println("正在访问action"); return "success"; } }