java struts2自定义调用方法

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

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

    <!--

    <constant name="struts.enable.DynamicMethodInvocation" value="false" />

    <constant name="struts.devMode" value="false" />

    <constant name="struts.i18n.encoding" value="gb2312" />

    <include file="example.xml"/>

    <package name="default" namespace="/" extends="struts-default">

        <default-action-ref name="index" />

        <action name="index">

            <result type="redirectAction">

                <param name="actionName">HelloWorld</param>

                <param name="namespace">/example</param>

            </result>

        </action>

    </package>

     -->

     <constant name="struts.devMode" value="true" />

     <package name="default" namespace="" extends="struts-default">

       <default-action-ref name="index"></default-action-ref>

       <action name="index" class="com.sun.action.MainPage" method="init">

            <result name="yes">

               /WEB-INF/index.jsp

            </result>

       </action>

     </package> 

    <!-- Add packages here -->

</struts>

package com.sun.action;

import com.opensymphony.xwork2.ActionSupport;

public class MainPage extends ActionSupport{

    //这个是默认的，如果action里面不配置，这个就是默认的

    @Override

    public String execute() throws Exception {

        // TODO Auto-generated method stub

        System.out.println("hello world");

        return "yes";

    }

    public String init() throws Exception{

        System.out.println("hello world 2");

        return "yes";

    }

}