MVC购物车(1)主要完成的功能

一、MVC是什么？

二、项目文件

三、登录功能的制作

login.jsp（登录界面）

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <link rel="stylesheet" href="${pageContext.request.contextPath}/bootstrap-3.3.7-dist/css/bootstrap.css">
    <script src="${pageContext.request.contextPath}/bootstrap-3.3.7-dist/js/jquery-3.5.1.js"></script>
    <script src="${pageContext.request.contextPath}/bootstrap-3.3.7-dist/js/bootstrap.js"></script>
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <title>登录界面</title>
    <style>
        form {
            width: 500px;
            margin: auto;
        }
    </style>
</head>
<body class="container">
<form action="login.do" method="post">
    <h1>登录</h1>
    <div class="form-group">
        <input name="account" class="form-control" placeholder="用户名">
    </div>
    <div class="form-group">
        <input name="password" class="form-control" placeholder="密码">
    </div>
    <div class="form-group">
        <button class="btn btn-primary btn-block">登录</button>
    </div>
</form>
</body>
</html>

LoginServlet.java（实现登录功能的页面）

package com.zking.servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.zking.biz.IUserBiz;
import com.zking.biz.impl.UserBizImpl;
import com.zking.pojo.OrderItem;
import com.zking.pojo.User;

/**
 * 实现登录功能
 * @author zjjt
 *
 */
@WebServlet("/login.do")
public class LoginServlet extends HttpServlet{
   
	private IUserBiz userBiz=new UserBizImpl();
	
	//接收用户的数据
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doPost(req, resp);
	}
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		req.setCharacterEncoding("utf-8");
		//参数获取
		String account = req.getParameter("account");
		String password = req.getParameter("password");
		
		//去biz完成登录验证
		User user = new User();
		//将值封装到对象里面去
		user.setAccount(account);
        user.setPassword(password);
        User u=userBiz.login(user);
        
        if(u==null) {
        	resp.sendRedirect("login.jsp");
        }else {
        	//将数据放到session中
        	req.getSession().setAttribute("user", u);
        	//为用户生成购物车
        	List<OrderItem>car=new ArrayList<OrderItem>();
        	req.getSession().setAttribute("car", car);
        	//把总价直接放到session中
        	req.getSession().setAttribute("total", 0);
        	//去到首页
        	resp.sendRedirect("index.do");
        }
	}
	
}

User.java(用户实体类)

package com.zking.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
/**
 * 用户实体类
 * @author zjjt
 *
 */

public class User {
	 private Integer id;
	 private String account;
	 private String password;
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getAccount() {
		return account;
	}
	public void setAccount(String account) {
		this.account = account;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public User(Integer id, String account, String password) {
		super();
		this.id = id;
		this.account = account;
		this.password = password;
	}
	 
	 
	public User() {
		// TODO Auto-generated constructor stub
	}
	@Override
	public String toString() {
		return "User [id=" + id + ", account=" + account + ", password=" + password + "]";
	}
	
	
	 
}

IUserDao.java(用户访问接口)

package com.zking.dao;

import com.zking.pojo.User;
/**
 * 用户数据访问接口
 * @author zjjt
 *
 */

public interface IUserDao {

	User login(User user);
}

UserDaoImpl.java（用户数据访问接口）

package com.zking.dao.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import com.zking.dao.IUserDao;
import com.zking.pojo.User;
import com.zking.util.DBHelper;
/**
 * 用户数据访问接口实现类
 * @author zjjt
 *
 */
public class UserDaoImpl implements IUserDao{

	private Connection con;
	private PreparedStatement ps;
	private ResultSet rs;
	
	@Override
	public User login(User user) {
		try {
			con=DBHelper.getCon();
			ps=con.prepareStatement("select * from car_user where  account =?");
		    ps.setString(1, user.getAccount());
		    rs=ps.executeQuery();
		    if(rs.next()) {
		    	User u=new User();
		    	u.setId(rs.getInt(1));
		    	u.setAccount(rs.getString(2));
		    	u.setPassword(rs.getString(3));
		       return u;
		    }
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			DBHelper.close(con, ps, rs);
		}
		return null;
	}
   
}

INewsBiz.java(用户逻辑接口)

package com.zking.biz;

import com.zking.pojo.User;
/**
 * 用户逻辑接口
 * @author zjjt
 *
 */
public interface IUserBiz {
	User login(User user);
}

UserBizImpl.java(用户逻辑接口实现类)

package com.zking.biz.impl;

import org.apache.commons.codec.digest.DigestUtils;

import com.zking.biz.IUserBiz;
import com.zking.dao.IUserDao;
import com.zking.dao.impl.UserDaoImpl;
import com.zking.pojo.User;
/**
 * 用户逻辑接口实现类
 * @author zjjt
 *
 */
public class UserBizImpl implements IUserBiz{

	private IUserDao userdao=new UserDaoImpl();
	@Override
	public User login(User user) {
		//user 是用户传进来的
		//u 是数据库中存在的
		User u=userdao.login(user);
		if(u==null) {
			
			return null;//account 账号在数据库中查询不到
		}
		//需要将前端的密码加密再和数据库的密码进行比较
		String pwd = DigestUtils.md5Hex(user.getPassword());
		if(!u.getPassword().equals(pwd)) {
			return null;//账号存在 密码不一致
		}
		return u;
	}

}

注意：数据库的密码是进行了加密的需要先将前端的密码加密再和数据库密码进行比较

四、.页面过滤器的制作

🔘过滤器Filter

精准匹配（/a.jsp）
扩展名匹配（*.jsp）
路径匹配（/manager/*）
匹配所有（/*）

注意过滤器是@WebFilter不要弄错了

如果对过滤器的流程不是很了解的可以查看如下过滤器的流程图 👇

我们购物车项目使用的过滤规则是/*(所有的页面都会被拦截)所以有些页面需要放行比如说登录页面。放行的代码如下

chain.doFilter(request,response);//放行

LoginFilter.java(登录过滤页面)

package com.zkiing.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.sun.net.httpserver.Filter.Chain;

@WebFilter("/*")//所有的请求都会被拦截
public class LoginFilter implements Filter{

	
	//如果登陆了正常通行
	//如果没登陆 让你回到登陆页面

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		//有一些页面需要放行
		//父转子强转拿到getServletPath()的方法
		HttpServletRequest req=(HttpServletRequest)request;
		HttpServletResponse resp=(HttpServletResponse)response;
		String path = req.getServletPath();
		if(path.equals("/login.jsp")||path.equals("/login.do")) {
			chain.doFilter(request,response);//放行
			return;
		}
		//判断你是否可以通行【有没有登陆 session中是否有user属性】
		Object user = req.getSession().getAttribute("user");
	    if(user==null) {
	    	resp.sendRedirect("login.jsp");
	    	return;
	    }else {
	    	chain.doFilter(request,response);//放行
	    	
	    }
}
}

五、全部商品的显示

商品显示功能的思路

login.jsp-(表单)->login.do-(登录验证)->index.do-(拿到首页需要的数据)->index.jsp 显示数据

index.jsp(首页代码)

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<link rel="stylesheet" href="bootstrap-3.3.7-dist/css/bootstrap.css">
<script src="bootstrap-3.3.7-dist/js/jquery-3.5.1.js"></script>
<script src="bootstrap-3.3.7-dist\js\bootstrap.js"></script>
<meta name="viewport" content="width=device-width,initial-scale=1">
<style>
body {
	padding: 20px 40px;
}
</style>
</head>
<c:if test="${list==null }">
  <c:redirect url="index.do"></c:redirect>
</c:if>
<body>
	<h1>
		${user.account} 您好, <small>这是首页</small>
	</h1>
	<h1>
		<a href="car.jsp" class="btn btn-primary" onclick="">点我去购物车</a>
	</h1>
	<table class="table table-bordered table-striped">
		<tbody><tr>
			<th>商品编号</th>
			<th>商品名称</th>
			<th>商品描述</th>
			<th>商品价格</th>
			<th>商品操作</th>
		</tr>
		<c:forEach items="${list }" var="goods">
		<tr>
			<td>${goods.id }</td>
			<td>${goods.name }</td>
			<td>${goods.describe }</td>
			<td>${goods.price }</td>
			<td><a href="add.do?id=${goods.id }" onclick="" class="btn btn-default">加入</a></td>
		</tr>
	</c:forEach>
		
		
	</tbody></table>

</body></html>

IndexServlet.java(处理首页界面)

package com.zking.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.zking.biz.IGoodsBiz;
import com.zking.biz.impl.GoodsBizImpl;
import com.zking.pojo.Goods;
/**
 * 处理首页界面
 * @author zjjt
 *
 */
@WebServlet("/index.do")
public class IndexServlet extends HttpServlet{

	private IGoodsBiz goodsBiz=new GoodsBizImpl();
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doPost(req, resp);
	}
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
	   //取到biz层商品数据的集合
		List<Goods> list = goodsBiz.list();
		//把数据放到index.jsp中去显示
		req.setAttribute("list",list);
		//只有转发才能携带请求的数据
		req.getRequestDispatcher("index.jsp").forward(req, resp);
	}
}

六、.购物车商品的添加

Car.jsp（购物车界面）

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib  prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<link rel="stylesheet" href="bootstrap-3.3.7-dist/css/bootstrap.css">
<script src="bootstrap-3.3.7-dist/js/jquery-3.5.1.js"></script>
<script src="bootstrap-3.3.7-dist\js\bootstrap.js"></script>
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>我的购物车</title>
</head>
<body>
<div class="container">
	<h1>
		${user.account} 您好, <small>这是首页</small>
	</h1>
	<h1>
		<a href="index.do" class="btn btn-default">继续购买</a>
		<a href="" class="btn btn-default">订单结算</a>
		<a href="" class="btn btn-default">查看订单</a>
	    <a href="clear.do" class="btn btn-default">清空</a>
	</h1>
	<table class="table table-bordered table-striped">
		<tbody><tr>
			<th>商品编号</th>
			<th>商品名称</th>
			<th>商品数量</th>
			<th>商品总价</th>
			<th>商品操作</th>
		</tr>
		<c:forEach items="${car }" var="item">
		
		<tr>
			<td>${item.goods.id }</td>
			<td>${item.goods.name}</td>
			<td>${item.quantity  }</td>
			<td>${item.total}</td>
			<td>
			<a href="del.do?id=${item.goods.id }" class="btn btn-default">删除</a>
			<a href="upd.do?id=${item.goods.id }1" class="btn btn-default">+1</a>
			<a href="upd.do?id=${item.goods.id }-1" class="btn btn-default">-1</a>
			</td>
		</tr>
		</c:forEach>
	</tbody></table>
	<h1>
	   total:${total }
	</h1>
	</div>

</body></html>

AddServlet.java（处理购物车商品添加界面）

package com.zking.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.zking.biz.IGoodsBiz;
import com.zking.biz.impl.GoodsBizImpl;
import com.zking.pojo.Goods;
import com.zking.pojo.OrderItem;

@WebServlet("/add.do")
public class AddServlet extends HttpServlet{
	
	private IGoodsBiz goodsBiz=new GoodsBizImpl();
	
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
	doPost(req, resp);
}
@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
	   List<OrderItem> car= (List<OrderItem>)req.getSession().getAttribute("car");
	  //拿到添加的商品编号
	   int id = Integer.parseInt(req.getParameter("id"));
     //购物车中已经有了
	  boolean f=true;
	   for(OrderItem item:car) {
		    //item 订单项中有一个与他对应的商品
		   if(item.getGoods().getId().equals(id)) {
			   //数量+1
			   item.setQuantity(item.getQuantity()+1);
		       //价格需要重新计算
			   Integer total=(Integer)req.getSession().getAttribute("total");
		       total+=item.getGoods().getPrice();
		       req.getSession().setAttribute("total",total);
			 
		       f=false;
		       break;
		    }
	   }
	   //购物车中没有添加购物车
	   if(f) {
		   //生成订单项的购物车
		   OrderItem item=new OrderItem();
		   //根据商品的id去数据库查询这件商品
		   Goods one= goodsBiz.one(id);
		   item.setGoods(one);
		   item.setQuantity(1);
		   item.setTotal(one.getPrice());
		   //添加订单项的购物车
		   car.add(item);
		   Integer total=(Integer)req.getSession().getAttribute("total");
	       total+=one.getPrice();
	       req.getSession().setAttribute("total",total);
	   }
	   //返回首页
	   resp.sendRedirect("index.do");

}
}

Goods.java(商品实体类)

package com.zking.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
/**
 * 商品实体类
 * @author zjjt
 *
 */

public class Goods {
 
	   private Integer id;
	   private String name;
	   private String describe;
	   private Integer price;
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getDescribe() {
		return describe;
	}
	public void setDescribe(String describe) {
		this.describe = describe;
	}
	public Integer getPrice() {
		return price;
	}
	public void setPrice(Integer price) {
		this.price = price;
	}
	public Goods(Integer id, String name, String describe, Integer price) {
		super();
		this.id = id;
		this.name = name;
		this.describe = describe;
		this.price = price;
	}
	   
	   public Goods() {
		// TODO Auto-generated constructor stub
	}
	@Override
	public String toString() {
		return "Goods [id=" + id + ", name=" + name + ", describe=" + describe + ", price=" + price + "]";
	}
	   
}

IGoodsDao.java（商品数据访问接口）

package com.zking.dao;

import java.util.List;

import com.zking.pojo.Goods;
/**
 * 商品数据访问接口
 * @author zjjt
 *
 */
public interface IGoodsDao {

	List<Goods>list();
	
	Goods one(int id);
}

GoodsDaoImpl .java(商品数据访问接口实现类)

package com.zking.dao.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

import org.apache.catalina.tribes.util.Arrays;

import com.zking.dao.IGoodsDao;
import com.zking.pojo.Goods;
import com.zking.util.DBHelper;
/**
 * 商品数据访问接口实现类
 * @author zjjt
 *
 */
public class GoodsDaoImpl implements IGoodsDao{

	private Connection con;
	private PreparedStatement ps;
	private ResultSet rs;
	
	/**
	 * 查询商品
	 */
	@Override
	public List<Goods> list() {
		List<Goods>list=new ArrayList<Goods>();
	    try {
			con=DBHelper.getCon();
			ps=con.prepareStatement("select*from car_goods ");
			rs=ps.executeQuery();
			while(rs.next()) {
				Goods goods=new Goods();
				goods.setId(rs.getInt(1));
				goods.setName(rs.getString(2));
				goods.setDescribe(rs.getString(3));
				goods.setPrice(rs.getInt(4));
				list.add(goods);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			DBHelper.close(con, ps, rs);
		}
		return list;
	}

	@Override
	public Goods one(int id) {
		List<Goods>list=new ArrayList<Goods>();
	    try {
			con=DBHelper.getCon();
			ps=con.prepareStatement("select*from car_goods where id=?");
			ps.setInt(1, id);
			rs=ps.executeQuery();
			if(rs.next()) {
				Goods goods=new Goods();
				goods.setId(rs.getInt(1));
				goods.setName(rs.getString(2));
				goods.setDescribe(rs.getString(3));
				goods.setPrice(rs.getInt(4));
				return goods;
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			DBHelper.close(con, ps, rs);
		}
		return null;
	}

}

IGoodsBiz.java(商品逻辑接口)

package com.zking.biz;

import java.util.List;

import com.zking.pojo.Goods;
/**
 * 商品逻辑接口
 * @author zjjt
 *
 */
public interface IGoodsBiz {

	List<Goods> list() ;
	Goods one(int id);
}

GoodsBizImpl.java(商品逻辑接口实现类)

package com.zking.biz.impl;

import java.util.List;

import com.zking.biz.IGoodsBiz;
import com.zking.dao.IGoodsDao;
import com.zking.dao.impl.GoodsDaoImpl;
import com.zking.pojo.Goods;
/**
 * 商品逻辑接口实现类
 * @author zjjt
 *
 */
public class GoodsBizImpl implements IGoodsBiz{

	private IGoodsDao goodsDao=new GoodsDaoImpl();
	@Override
	public List<Goods> list() {

		return goodsDao.list();
	}
	@Override
	public Goods one(int id) {
		return goodsDao.one(id);
	}

}

七、购物车数量加减&总价计算

UpdServlet.java(处理数量加减的界面)

package com.zking.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.zking.biz.IGoodsBiz;
import com.zking.biz.impl.GoodsBizImpl;
import com.zking.pojo.Goods;
import com.zking.pojo.OrderItem;

@WebServlet("/upd.do")
public class UpdServlet extends HttpServlet{
	

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doPost(req, resp);
	}
	@Override
		protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		   List<OrderItem> car= (List<OrderItem>)req.getSession().getAttribute("car");
		  //拿到添加的商品编号
		   int id = Integer.parseInt(req.getParameter("id"));
		   
		   //获取需要改变的类型
		   int type = Integer.parseInt(req.getParameter("type"));
	     //购物车中已经有了

		   for(OrderItem item:car) {
			    //item 订单项中有一个与他对应的商品
			   if(item.getGoods().getId().equals(id)) {
				   //数量+1/-1
				  int count= item.getQuantity()+type;
				  if(count<1)count=1;//最少一个
				  if(count>5)count=5;//最大五个
				  item.setQuantity(count);
			       //价格需要重新计算
				  item.setTotal(item.getQuantity()*item.getGoods().getPrice());
				 // Integer total=(Integer)req.getSession().getAttribute("total");
			      // total+=type*item.getGoods().getPrice();
			       //req.getSession().setAttribute("total",total);
				req.getSession().setAttribute("total",car.stream()
	                        .mapToInt(OrderItem::getTotal)
	                       .sum());
			       break;
			    }
		   }
		  
		   //返回首页
		   resp.sendRedirect("car.jsp");

	}
}

八、删除商品

ClearServlet.java(处理删除商品的界面）

package com.zking.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.zking.biz.IGoodsBiz;
import com.zking.biz.impl.GoodsBizImpl;
import com.zking.pojo.Goods;
import com.zking.pojo.OrderItem;

@WebServlet("/clear.do")
public class ClearServlet extends HttpServlet{
	
	private IGoodsBiz goodsBiz=new GoodsBizImpl();
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doPost(req, resp);
	}
	@Override
		protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		   List<OrderItem> car= (List<OrderItem>)req.getSession().getAttribute("car");
	      //清空购物车
		   car.clear();
		 
		   //返回首页
		   resp.sendRedirect("car.jsp");

	}
}

九、清空购物车

ClearServlet.java(处理清空购物车的界面)

package com.zking.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.zking.biz.IGoodsBiz;
import com.zking.biz.impl.GoodsBizImpl;
import com.zking.pojo.Goods;
import com.zking.pojo.OrderItem;

@WebServlet("/clear.do")
public class ClearServlet extends HttpServlet{
	
	private IGoodsBiz goodsBiz=new GoodsBizImpl();
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doPost(req, resp);
	}
	@Override
		protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		   List<OrderItem> car= (List<OrderItem>)req.getSession().getAttribute("car");
	      //清空购物车
		   car.clear();
		 
		   //返回首页
		   resp.sendRedirect("car.jsp");

	}
}

数据库建表

car_user(用户表)

create table car_user(
    id number primary key,--用户id
    account  varchar2(30) not null,--用户账号
    password varchar(32)  not null--用户密码

);

insert into car_user
values (1, '2890@fox.com', 'ff9830c42660c1dd1942844f8069b74a');-- root123

insert into car_user
values (2, '2357@fox.com', 'e10adc3949ba59abbe56e057f20f883e');-- 123456

car_goods（商品表）

create table car_goods
(
    id       number primary key,--商品id
    name     varchar2(20)                        not null,--商品名称
    describe varchar2(100) default '此商品暂时没有介绍藍' not null,--商品描述
    price    number                              not null--商品价格
);

car_order（订单表）

create table car_order
(
    id      number primary key,--订单id
    user_id number not null,--用户id
    total   number not null--订单总价
);

car_order_item(购物车订单项表)

create table car_order_item
(
    id       number primary key,--订单项编号
    order_id number not null,--订单id
    goods_id number not null,--商品id
    quantity number not null,--下单的数量
    total    number not null--订单项总价
);

今天的分享就要这结束啦！！✌

以上就是关于JavaWeb MVC购物车(1)的一些内容！！📖

期待下次再见！！😊

JavaWeb MVC购物车(1)