Action 处理请求参数-属性驱动模型驱动

最新推荐文章于 2024-07-06 08:18:15 发布

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本文详细介绍了Struts2框架中属性驱动和模型驱动两种数据处理方式的实现原理及应用示例。通过对比，展示了如何使用User类和UserLoginAction进行用户登录验证，以及在JSP页面上的数据绑定。

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1.属性驱动

User.java

package com.qwl.domain;

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;
	}
}

UserLogin.java

package com.qwl.action;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.qwl.domain.User;

public class UserLoginAction extends ActionSupport {
	private User user;

	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}
	
	public String excute() throws Exception{
		ActionContext context =ActionContext.getContext();
		if("itcast".equals(user.getUsername())&&"123".equals(user.getPassword())){
			context.getSession().put("username", user.getUsername());
			context.getSession().put("password", user.getPassword());
			return SUCCESS;
		}else{
			context.getSession().put("error", "用户登录失败");
			return ERROR;
		}
	}
}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC  
            "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"  
    "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<package name="struts" extends="struts-default">
		<action name="userlogin" class="com.qwl.action.UserLoginAction">
			<result name="success">/loginSuccess.jsp</result>
			<result name="error">/loginError.jsp</result>
		</action>
	</package>
</struts>

userLogin.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<div align="center">
		<form name="form1" action="userlogin.action" method="post">
			用户名：<input type="text" name="user.username"><br>
			密码：<input type="password" name="user.password"> <br>
			<input type="submit" value="登录">
		</form>
	</div>
</body>
</html>

2.模型驱动

User.java

package com.qwl.domain;

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;
	}
}

UserLoginAction.java

package com.qwl.action;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.qwl.domain.User;

public class UserLoginAction extends ActionSupport implements ModelDriven<User>{
	private User user=new User();
	public User getModel(){
		return user;
	}
	public String excute() throws Exception{
		ActionContext context =ActionContext.getContext();
		if("itcast".equals(user.getUsername()) && "123".equals(user.getPassword())){
			context.getSession().put("username", user.getUsername());
			context.getSession().put("password", user.getPassword());
			return SUCCESS;
		}else{
			context.getSession().put("error", "用户登录失败");
			return ERROR;
		}
	}
}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC  
            "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"  
    "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<package name="struts" extends="struts-default">
		<action name="userlogin" class="com.qwl.action.UserLoginAction">
			<result name="success">/loginSuccess.jsp</result>
			<result name="error">/loginError.jsp</result>
		</action>
	</package>
</struts>

userLogin.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<div align="center">
		<form name="form1" action="userlogin.action" method="post">
			用户名：<input type="text" name="username"><br>
			密码：<input type="password" name="password"> <br>
			<input type="submit" value="登录">
		</form>
	</div>
</body>
</html>