Struts中Action三種接收參數的方式？

本文轉載自查看原文 2015-08-01 22:19 2937 Struts2

前言：

前面已經有一篇隨筆介紹了Struts2的大概原理。本文就Struts2中Action與jsp頁面進行數據對接時介紹幾種常見方法！

值棧ValueStack

3個Action

Action1

package com.gdufe.action;

import com.opensymphony.xwork2.ActionSupport;

/*
 * Action接收參數之后通過set方法賦給普通變量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;
    }
}

View Code

Action2

package com.gdufe.action;

import com.gdufe.pojo.User;
import com.opensymphony.xwork2.ActionSupport;

/*
 * Action接收參數之后賦給引用對象“user”,內部是set方法賦值
 */
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";
    }
}

View Code

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;
    }
}

View Code

2個頁面

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傳值測試</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傳值雙擊debug</h2>
    <s:debug></s:debug>  
    <!-- debug重要的strut2標簽調試工具 -->
  </body>
</html>

1個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設置為開發模式   -->
     <constant name="struts.devMode" value="true" />
     <package name="default" extends="struts-default">
         <!-- 注：因為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>