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！
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值栈ValueStack
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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传值双击debug</h2>
<s:debug></s:debug>
<!-- debug重要的strut2标签调试工具 -->
</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>
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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——------------------*-------------------------
对应Action2——------------------*-------------------------
对应Action3——------------------*-------------------------
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！
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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！
时间： 2024-08-01 21:11:27