struts2学习day01之以对象的形式封装数据

最新推荐文章于 2025-08-11 20:01:22 发布

青杨子

最新推荐文章于 2025-08-11 20:01:22 发布

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分类专栏： Struts2 文章标签： web.xml java

本文链接：https://blog.youkuaiyun.com/Tyan520/article/details/84246001

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本文详细介绍了如何使用Struts2框架构建Web应用，包括配置过滤器、实现登录功能、创建实体类、DAO接口及其实现类、Action处理逻辑等关键步骤。

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1.在web.xml中

 <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>

2.在loginUser.jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
	</head>
	<body>
		<center>
			<form action="loginUser.action" method="get">
				userName
				<input name="user.username" type="text" />
				<br>
				passWord
				<input name="user.pwd" type="password" />
				<br>
				<input type="submit" value="Submit" />
			</form>
		</center>
	</body>
</html>

3.在zx.struts2.day1.entity包中写User.java实体类

package zx.struts2.day1.entity;

public class User {
	private String username;
	private String pwd;

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPwd() {
		return pwd;
	}

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

}

4.在zx.struts2.day1.dao包中写UserDao接口定义方法

package zx.struts2.day1.dao;

import java.util.List;

import zx.struts2.day1.entity.User;

public interface UserDao {
  public List<User> findAll();
}

5.在zx.struts2.day1.dao.impl包中写UserDao的实现类UserDaoImpl

package zx.struts2.day1.dao;

import java.util.ArrayList;
import java.util.List;

import zx.struts2.day1.entity.User;

public class UserDaoImpl implements UserDao {

	@Override
	public List<User> findAll() {
		List<User> lists = new ArrayList<User>();
		User u1 = new User();
		u1.setUsername("haoren");
		u1.setPwd("123");
		User u2 = new User();
		u2.setUsername("calm");
		u2.setPwd("123");
		User u3 = new User();
		u3.setUsername("jerry");
		u3.setPwd("123");
		lists.add(u1);
		lists.add(u2);
		lists.add(u3);
		return lists;
	}

}

6.在LoginUserAction中extends ActionSupport

package zx.struts2.day1.action;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.interceptor.ServletRequestAware;

import zx.struts2.day1.entity.User;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class LoginUserAction extends ActionSupport implements ServletRequestAware {
	private User user;// User对象

	public String execute() {
		
		ActionContext ctx=ActionContext.getContext();
		//向request对象中添加数据
		ctx.put("name", "requestScope");
		ctx.put("uname", user.getUsername());
		//向Session对象中添加数据
		ctx.getSession().put("name", "sessionScope");
		//向ServletContext对象(application)中添加数据
		ctx.getApplication().put("name","applicationScope");
	
		System.out.println("name=="+user.getUsername()+" :  "+"pwd==="+user.getPwd());
		if ("haoren".equals(user.getUsername()) && "250".equals(user.getPwd())) {
			return SUCCESS;
		} else {
			return "error";
		}

	}

	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}

	@Override
	public void setServletRequest(HttpServletRequest arg0) {
		// TODO Auto-generated method stub
		
	}

}

7.在struts.xml文件中

<struts>
        <package name="day1Demo" namespace="/" extends="struts-default">
         <action name="loginUser"
			class="zx.struts2.day1.action.LoginUserAction">
			<result name="success">/ok.jsp</result>
			<result name="error">/err.jsp</result>
         </action>
       </package>
</struts>