Struts2动态方法调用：通配符方式

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
    <package name="default"  extends="struts-default">
           <action name="*_*" method="{2}" class="action.{1}Action"> 
               <result>/result.jsp</result>
               <result name="add">/{2}.jsp</result>
               <result name="update">/{2}.jsp</result>
           </action>
   </package>
</struts>    

public class HelloWorldAction extends ActionSupport{

    public String add(){
        return "add";
    }
    
    public String update(){
        return "update";
    }
    
    @Override
    public String execute() throws Exception{
        // TODO Auto-generated method stub
        System.out.println("执行Action");
        return "success";
    }

}