Struts中Action三种接收参数的方式？

前言：

前面已经有一篇随笔介绍了Struts2的大概原理。本文就Struts2中Action与jsp页面进行数据对接时介绍几种常见方法！

值栈ValueStack

3个Action

Action1

package com.gdufe.action;

import com.opensymphony.xwork2.ActionSupport;

/*

 * Action接收参数之后通过set方法赋给普通变量age，name;

 */

public class UserAction1 extends ActionSupport{

    private int age;

    private String name;

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String execute(){

        return SUCCESS;

    }

    public String test(){

        System.out.println(age +"|"+ name);

        return SUCCESS;

    }

}

Action2

package com.gdufe.action;

import com.gdufe.pojo.User;

import com.opensymphony.xwork2.ActionSupport;

/*

 * Action接收参数之后赋给引用对象“user”,内部是set方法赋值

 */

public class UserAction2 extends ActionSupport {

    private User user;

    public User getUser() {

        return user;

    }

    public void setUser(User user) {

        this.user = user;

    }

    public String test(){

        System.out.println(user.getName() + "|" + user.getAge());

        return "success";

    }

}

Action3

package com.gdufe.action;

import com.gdufe.pojo.User;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

public class UserAction3 extends ActionSupport implements ModelDriven<User> {

    private User user = new User();

    public String test(){

        System.out.println(user.getName() + "|" + user.getAge());

        return "success";

    }

    public User getModel() {

        return user;

    }

}

2个页面

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags" %>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

  </head>

  <body>

　　　　<h2>Action传值测试</h2>
　　　　<a href="userAction1!test?age=8&name=admin">test1:Attribution</a> <br>
　　　　<a href="userAction2!test?user.age=8&user.name=admin">test2:JavaBean</a> <br>
　　　　<a href="userAction3!test?age=8&name=admin">test3:ModelDriven</a> <br>

  </body>

</html>

　　　 success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags" %>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

  </head>

  <body>

    <h2>Action传值双击debug</h2>

    <s:debug></s:debug>

    <!-- debug重要的strut2标签调试工具 -->

  </body>

</html>

1个struts.xml配置文件

<?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>

     <!-- devMode设置为开发模式   -->

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

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

         <!-- 注：因为Action采用DMI方式，故不需要指明method 以及 ‘result’ -->

        <action name="userAction1" class="com.gdufe.action.UserAction1" >

            <result>/success.jsp</result>

        </action>

        <action name="userAction2" class="com.gdufe.action.UserAction2" >

            <result>/success.jsp</result>

        </action>

        <action name="userAction3" class="com.gdufe.action.UserAction3" >

            <result>/success.jsp</result>

        </action>

    </package>

</struts>

　　运行结果：

对应Action1——------------------*-------------------------

Struts中Action三种接收参数的方式？

　　对应Action2——------------------*-------------------------

Struts中Action三种接收参数的方式？

　　对应Action3——------------------*-------------------------

Struts中Action三种接收参数的方式？

注意：新手的话请勿按部就班，因为还有初始配置没有说明，比如jar包及web.xml配置。详细配置自己读manual帮助文档或者上网参考！

==============================

结语：近期在接手Web开发时，数据对接不熟练；鉴于此，才再次翻起struts2的一些基础知识加深理解。希望能给有打算从事Java的朋友些许借鉴！

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Struts中Action三种接收参数的方式？

值栈ValueStack

3个Action

2个页面

1个struts.xml配置文件

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