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  • Hibernate+Struts2进行数据的修改

    1.先把userid传给修改的页面

    2.跳转到修改的页面

    3.用request接收传入输入需改信息的页面

    传到action

    Action，  通过request获取id

    service层

    DAO层

    <%@page import="com.hanqi.entity.User"%>
<%@page import="java.util.List"%>
<%@ 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>查询所有</title>
</head>
<body>
<%
List<User> lu = (List<User>)request.getAttribute("userlist");


for(User u : lu)
{
	out.print(u+"【<a href='updateUser?userid="+u.getUserId()+
			"'>修改</a>】"+"【<a href='deleteUser?userid="+u.getUserId()+"'>删除</a>】 <br>");
}

%>
</body>
</html>

    　　

    <?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>
	<!-- 覆盖默认的过滤的扩展名 -->
	<constant name="struts.action.extension" value="do,action,,"></constant>
	
	<!-- 定义包 -->
	<package name="text" extends="struts-default" >
	
		<action name="addUser">
			<result>/WEB-INF/pages/addUser.jsp</result>
		</action>
		
		<!--保存user  -->
		<action name="saveUser" class="com.hanqi.action.UserAction" method="saveUser">
		
			<result name="fail">/WEB-INF/pages/fail.jsp</result>
			<result name="success">/WEB-INF/pages/success.jsp</result>
		</action>
		
		<!-- 查询用户 -->
		<action name="selectUser" class="com.hanqi.action.UserAction" method="selectUser">
			<result name="fail">/WEB-INF/pages/fail.jsp</result>
			<result name="success">/WEB-INF/pages/selectUser.jsp</result>
		</action>
		
		<!-- 删除 -->
		<action name="deleteUser" class="com.hanqi.action.UserAction" method="deleteUser">
			<result name="fail">/WEB-INF/pages/fail.jsp</result>
			<result name="success" type="redirectAction">selectUser</result>
		</action>
		
		<!-- 修改 ，跳转到修改页面-->
		<action name="updateUser" >
			<result>/WEB-INF/pages/updateUser.jsp</result>
			<result name="fail">/WEB-INF/pages/fail.jsp</result>
		</action>
		<!-- 修改输入 -->
		<action name="updateUser2"  class="com.hanqi.action.UserAction" method="updateUser">
			<result name="fail">/WEB-INF/pages/fail.jsp</result>
			<result name="success" type="redirectAction">selectUser</result>
		</action>
		
		
	</package>

</struts>

    　　

    <%@page import="com.hanqi.dao.UserDAO"%>
<%@page import="com.hanqi.service.UserService"%>
<%@page import="com.hanqi.entity.User"%>
<%@ 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>请输入修改内容</title>
</head>
<body>
<%
//得到selectUser传过来的userid，用request接收再向下传
int userID = Integer.parseInt(request.getParameter("userid"));
out.print(userID);
UserDAO ud =new UserDAO();
User u=ud.getUser(userID);//利用获取到的userid得到user对象，便于在文本框里显示
%>
<form action="updateUser2" method="post">
用户id：<input type="text" name="user.userID"value="<%=u.getUserId() %>" readonly><br>
用户姓名：<input type="text" name="user.userName"value="<%=u.getUserName() %>"><br>
用户生日：<input type="text" name="user.birthday"value="<%=u.getUserName() %>"><br>
用户薪酬：<input type="text" name="user.money"value="<%=u.getMoney() %>"><br>
<br><br>
<input type="submit" value="提交修改">


</form>

</body>
</html>

    　　

    package com.hanqi.action;

import java.util.List;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.hanqi.entity.User;
import com.hanqi.service.UserService;
import com.opensymphony.xwork2.ActionContext;

public class UserAction {
	
	//域模型方式
	private User user;
	
	public User getUser() {
		return user;
	}

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


	//处理保存user的方法
	public String saveUser()
	{
		String rtn="fail";
		
		System.out.println(user);
		
		try
		{
		//调用业务逻辑层Service（模型层）
		User u1 = new UserService().add(user);
		
		//使用request转发到下一个页面去
		ActionContext  ac = ActionContext.getContext();
		Map<String, Object> mo = (Map<String, Object>)ac.get("request");
		mo.put("user", u1);
		
		rtn="success";
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		return rtn;
	}
	
	//查询用户
	public String selectUser()
	{
		String rtn ="fail";
		try
		{
			//调用查询的方法
			
			List<User>  lu = new UserService().getAll();
			//得到原生 的request
			HttpServletRequest hsr = ServletActionContext.getRequest();
			hsr.setAttribute("userlist", lu);
			
			rtn="success";
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		return rtn;
		
	}
	
	
	
	//删除用户
	public String deleteUser()
	{
		String rtn ="fail";
		try
		{
			//获取userid
			//得到原生 的request
			HttpServletRequest hsr = ServletActionContext.getRequest();
			String  uid = hsr.getParameter("userid");
			//执行删除
			new UserService().delete(Integer.parseInt(uid));
			
			rtn="success";
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		
		return rtn;
	}
	
	//修改用户
	
	public String updateUser()
	{
		String rtn ="fail";
		
		try
		{

			//获取userid
			//得到原生 的request
			HttpServletRequest hsr = ServletActionContext.getRequest();
			String userid = hsr.getParameter("user.userID");//通过request获取页面传过的id

			//调用业务逻辑层Service（模型层）
			 int userID = Integer.parseInt(userid) ;//吧页面传过来的userid转换成DAO层的int型进行对应
			 //System.out.println(userID);
			 new UserService().update(userID, user);
			
			
			rtn="success";
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		
		return rtn;
	}
	
	//查询单个
	public String selectOneUser()
	{
		String rtn ="fail";
		try
		{
			//调用查询单个的方法
			//获取userid
			//得到原生 的request
			HttpServletRequest hsr = ServletActionContext.getRequest();
			String userid = hsr.getParameter("user.userID");
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		
		return rtn;
	}

}

    　　

    package com.hanqi.service;

import java.util.List;

import com.hanqi.dao.UserDAO;
import com.hanqi.entity.User;

public class UserService {
	
	//添加User
	public User add(User user)
	{
		return new UserDAO().insert(user);
	}

	
	//查询全表
	public List<User>  getAll()
	{
		return new UserDAO().getAll();
	}
	
	
	//删除
	public void delete(int userID)
	{
		new UserDAO().delete(userID);
	}
	
	//修改
	public void update(int userID, User user)
	{
		new UserDAO().updateUser(userID, user);
	}
	//查询单个
	public User getOntUser(int userID)
	{
		return new UserDAO().getUser(userID);
	}
}

    　　

    package com.hanqi.dao;

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

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

import com.hanqi.entity.User;

public class UserDAO {
	private Configuration cfg =null;
	private ServiceRegistry  sr =null;
	private SessionFactory  sf =null;
	private Session  se =null;
	private Transaction  tr =null;
	//构造方法
	public UserDAO()
	{
		//初始化Hibernate
		cfg= new Configuration().configure();//获取配置文件
		sr= new StandardServiceRegistryBuilder()//注册
				.applySettings(cfg.getProperties())
				.build();
	}
	
	//
	private void init()
	{
		sf = cfg.buildSessionFactory(sr);
		se =sf.openSession();
		tr = se.beginTransaction();
	}
	private void destory()
	{
		tr.commit();
		se.close();
		sf.close();
	}
	
	//保存user
	public User insert(User user)//添加
	{
	
		init();
		se.save(user);
		destory();
		return user;
		
	}
	
	//查询列表
	public List<User> getAll()
	{
		List<User> rtn = new ArrayList<>();
		init();
		rtn = se.createQuery("from User").list();  //类名
		
		destory();
		return rtn;
	}
	
	//删除
	public void delete(int userID)
	{
		init();
		//获取对象
		User u = (User)se.get(User.class, userID);
		se.delete(u);
		
		destory();
	}

	
	//修改
	public void updateUser(int userID, User user)
	{
		init();
		//获取对象
		User u = (User)se.get(User.class, userID);//通过session获取userID的信息
		u.setUserId(userID);
		u.setUserName(user.getUserName());
		u.setMoney(user.getMoney());
		u.setBirthday(user.getBirthday());
		
		destory();
		
	}
	//查询单条记录
	public User getUser (int userID)
	{
		User rtn = new User();
		init();
		rtn = (User)se.get(User.class, userID);
		
		
		destory();
		return rtn;
		
	}
	
}

    　　
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  • 原文地址：https://www.cnblogs.com/liuyanzeng/p/6073010.html
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