struts2.5.* 通配符问题

使用通配符出行错误，提示找不到类及方法

There is no Action mapped for namespace [/] and action name [Shop_Shop] associated with context path [/SunZc]. - [unknown location]
    at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:192)
    at org.apache.struts2.factory.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
    at org.apache.struts2.factory.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37)
    at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)

    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:554)
    at org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:81)
    at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:143)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at com.sunzc.filter.CharSetFilert.doFilter(CharSetFilert.java:23)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:958)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

原因：

struts2.5 为了增加安全性，在 struts.xml 添加了这么个属性：<global-allowed-methods>regex:.*</global-allowed-methods>

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">
 
<struts>

<package name="default" namespace="/" extends="struts-default">
   <global-allowed-methods>regex:.*</global-allowed-methods>
 <action name="helloworld" class="com.imooc.action.HelloWorldAction">
      <result>/result.jsp</result>
      <result name="add">/add.jsp</result>
      <result name="update">/update.jsp</result>
 </action>
 
</package>
 
<constant name="struts.enable.DynamicMethodInvocation" value="true"></constant>
 
</struts>

1.首先，注意头部信息，这个应该是用来指定文件中允许使用那些标签。
　　<!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN" "http://struts.apache.org/dtds/struts-2.5.dtd">

2.加上下面这句。
　　<global-allowed-methods>regex:.*</global-allowed-methods>
　或者（不加上面这句），在action中加上指定允许调用的方法的语句：
　　<allowed-methods>login,logout</allowed-methods>