struts2模型驱动方式传值

悠悠 2022-05-24 00:28 195阅读 0赞

#### 【例】用户登录   第一步：创建user域对象 ####

package com.dwx.bean;
    public class User {
    	private String username;
    	private String password;
    	public String getUsername() {
    		return username;
    	}
    	public void setUsername(String username) {
    		this.username = username;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    }

#### 第二步：创建action ####

package com.dwx.action;
    import com.dwx.bean.User;
    import com.opensymphony.xwork2.ActionContext;
    import com.opensymphony.xwork2.ActionSupport;
    import com.opensymphony.xwork2.ModelDriven;
    public class userAction extends ActionSupport implements ModelDriven<User>{
    	private User user=new User();
    	public User getModel() {
    		return user;
    	}
    	@Override
    	public String execute() throws Exception {
    		if(user.getUsername().equals("admin")&&user.getPassword().equals("123")){
    			return SUCCESS;
    		}else{
    			return ERROR;
    		}
    	}
    }

#### 第三步：配置struts.xml ####

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC
    	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    	"http://struts.apache.org/dtds/struts-2.3.dtd">
    <struts>
    	<package name="default" extends="struts-default" namespace="/">
    		<action name="user" class="com.dwx.action.userAction">
    			<result>/success.jsp</result>
    			<result name="error">/login.jsp</result>
    		</action>
    	</package>
    </struts>

#### 第四步：创建login.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>用户登录</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>
        <center>
        <s:form action="user" method="post">
        	<s:textfield name="username" label="用户名"></s:textfield>
        	<s:password name="password" label="密码"></s:password>
        	<s:submit value="登录"></s:submit>
        </s:form>    	
        </center>
      </body>
    </html>

#### 第五步：创建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>登录成功</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>
        	欢迎您<s:property value="username"/>
      </body>
    </html>

#### 效果： ####

#### 用户登录 ####

![20180517085748728][]

#### 登录成功 ####

![20180517085757195][]

[20180517085748728]: /images/20220524/ee18a4f6c2cb4604a10fb1312cc72909.png
[20180517085757195]: /images/20220524/c87acd27f71d438b8c45b92e87da8c82.png