熟悉struts2MVC模式之用模型驱动传参的例子

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本文介绍了一个使用Struts2框架实现的学生信息登录与展示的应用案例。详细展示了web.xml、struts.xml配置文件内容，包括过滤器设置、action映射等；提供了完整的model层（POJO）、control层（Action）及view层（JSP页面）代码。

web.xml配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping></web-app>

model层（pojo普通java类）：

package com.bjsxt.model;

public class Stu {

private int id;
private String name;
private String pwd;

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getPwd() {
return pwd;
}

public void setPwd(String pwd) {
this.pwd = pwd;
}

}

control控制层（action类）：

package com.bjsxt.action;

import com.bjsxt.model.Stu;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class StuAction extends ActionSupport implements ModelDriven<Stu> {

public Stu getStu() {
return stu;
}

public void setStu(Stu stu) {
this.stu = stu;
}

private Stu stu = new Stu();

@Override
public Stu getModel() {

return stu;
}

@Override
public String execute() throws Exception {

  System.out.println(stu.getId());
  System.out.println(stu.getName());
  System.out.println(stu.getPwd());
  return "stu";
}
}

显示层（view）登陆页面：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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 'stulogin.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>
        <h3 align="center">stu_info</h3>
    <form action="StuAction" method="post">
    ID号:<input type="text" name="id"><br>
    姓名:<input type="text" name="name"><br>
    密码:<input type="password" name="pwd"><br>
    <input type="submit" value="提交">
    <input type="reset" value="重置">
    </form>
</body>
</html>

显示层（view）输出页面：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>My JSP 'stu.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>
    <h3 align="center">stu_collect</h3>
    <p align="center">
    ID号:<%=request.getParameter("id") %><br>
          姓名:<%=request.getParameter("name") %><br>
          密码:<%=request.getParameter("pwd") %><br>
    </p>
</body>
</html>

配置文件struts.xml

<?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="a" namespace="/" extends="struts-default">
  <action name="User" class="com.bjsxt.action.User">
   <result name="user">user.jsp</result>
  </action>
  <action name="StuAction" class="com.bjsxt.action.StuAction">
   <result name="stu">stu.jsp</result>
  </action>
</package>