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JavaWeb在线商城系统(java+jsp+servlet+MySQL+jdbc+css+js+jQuery)

tomcat javaweb jsp mysql java 2023-08-19 12:08:09 113人浏览安东尼

摘要

javaweb在线商城系统 JavaWeb在线商城开发知识总结(java+jsp+servlet+MySQL+jdbc+css+js+jQuery)获取项目数据和数据库：期末实训项目-JavaWeb在线商城系统项目代码及数据库下载链

javaweb在线商城系统

JavaWeb在线商城开发知识总结(java+jsp+servlet+MySQL+jdbc+css+js+jQuery)
获取项目数据和数据库：
期末实训项目-JavaWeb在线商城系统

JavaWEB在线商城开发知识总结(java+jsp+servlet+Mysql+jdbc+CSS+js+Jquery)

这个基于JavaWeb的在线商城项目是我们专业这学期期末实训的项目

项目视频演示

期末实训项目-JavaWeb在线商城系统(java+jsp+servlet+mysql+jdbc+css+js+jQuery)

获取项目数据和数据库：

期末实训项目-JavaWeb在线商城系统

项目代码及数据库下载链接

gitee链接：
https://gitee.com/yuhaowen/ShoppingMall.git
GitHub：
https://github.com/yuhaowen0917/JavaWeb-ShoppingMall.git
项目资源和数据库
https://download.csdn.net/download/yuyunbai0917/85839278

项目结构图
在这里插入图片描述

数据库设计

在这里插入图片描述

前端界面设计

商城首页

在这里插入图片描述

商城首页.html

DOCTYPE html><html><head><meta charset="utf-8" /><title>实训在线商城title><link rel="stylesheet" type="text/css" href="css/public.css"/><link rel="stylesheet" type="text/css" href="css/shouye.css"/><script src="js/jquery-3.6.0.js" type="text/javascript" charset="utf-8">script><script src="js/front_page.js" type="text/javascript" charset="utf-8">script>head><body><div class="head"><div class="head_zi"><div class="huan">,欢迎您div><div class="car"><a href="购物车界面.html"><img src="images/购物车.png" height="28px"><span>购物车span>a>div><div class="login"><div><a href="注册.html">登录a>div><div><a href="注册.html">注册a>div>div>div>div><div class="search_kuang"><div class="search"><input type="text" class="text"><button><img src="images/搜索图标.png" width="40px">button>div>div><div class="shop"><div class="lunbo" ><span class="right" id="right">span><span class="left" id="left">span><div id="lunbo" ><div><a href="#"><img src="images/mi11.png" >a>div><div><a href="#"><img src="images/pingban5.png" >a>div><div><a href="#"><img src="images/450ebe4e2420eba7064b6ce08b2fc503.jpg">a>div><div><a href="#"><img src="images/3e34DDD6b7bcbfb90ed09e871d291593.png" >a>div><div><a href="#"><img src="images/f89261d8655d76f2ab2340e4a3738678.jpg">a>div>div>div><div class="nei"><div class="box_tit w"><h2 class="title">手机h2><div class="nei_pohot"><ul><li class="phone_tu"><a href="#"><div class="ph"><img src="images/phone/63e15f377e87212d460592b4a1369ccd.jpg" >div><div class="na">Xiaomi 12Xdiv><p>￥3199p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/phone/a7382271e3a677bf188679ca38d68a42.jpg" >div><div class="na">Xiaomi 12 Prodiv><p>￥4699p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/phone/0d4b362431de4bdda03315ffdbc7b32a.jpg" >div><div class="na">            Xiaomi 11 青春活力版        div><p>￥1999p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/phone/6d0a3e7acc3e91e2cfd83Dbbe1d1c029.jpg" >div><div class="na">            Redmi Note 11 Pro系列        div><p>￥1799p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/phone/63e15f377e87212d460592b4a1369ccd.jpg" >div><div class="na">Xiaomi 12Xdiv><p>￥3199p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/phone/a7382271e3a677bf188679ca38d68a42.jpg" >div><div class="na">Xiaomi 12 Prodiv><p>￥4699p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/phone/0d4b362431de4bdda03315ffdbc7b32a.jpg" >div><div class="na">Xiaomi 11 青春活力版div><p>￥1999p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/phone/6d0a3e7acc3e91e2cfd83dbbe1d1c029.jpg" >div><div class="na">Redmi Note 11 Pro系列div><p>￥1799p>a>li>ul>div>div><div class="box_tit w"><h2 class="title">电脑h2><div class="nei_pohot"><ul><li class="phone_tu"><a href="#"><div class="ph"><img src="images/computer/dbeee1b261367546.jpg" >div><div class="na">微星(MSI)PRO 电脑主板div><p>￥3629p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/computer/8079c5b8a20b6eb7.jpg" >div><div class="na">新品英特尔酷睿12代div><p>￥1999p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/computer/O1CN01XdmjpR1iouqoGgg5r_!!2616970884.jpg" >div><div class="na">笔记本电脑小新air14 银div><p>￥4399p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/computer/f063016c41fa50de.jpg" >div><div class="na">索尼（SONY）playstation5div><p>￥5099p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/computer/dbeee1b261367546.jpg" >div><div class="na">微星(MSI)PRO 电脑主板div><p>￥3629p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/computer/8079c5b8a20b6eb7.jpg" >div><div class="na">新品英特尔酷睿12代div><p>￥1999p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/computer/O1CN01XdmjpR1IOuqoGgg5r_!!2616970884.jpg" >div><div class="na">笔记本电脑小新Air14 银div><p>￥4399p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/computer/f063016c41fa50de.jpg" >div><div class="na">索尼（SONY）playstation5div><p>￥5099p>a>li>ul>div>div><div class="box_tit w"><h2 class="title">家用电器h2><div class="nei_pohot"><ul><li class="phone_tu"><a href="#"><div class="ph"><img src="images/home/181a74dccd6f4a71.jpg" >div><div class="na">西门子（SIEMENS）蒸烤箱一体机嵌入式div><p>￥7999p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/home/c7c15101f2c8a652a4a0d069501d1e53.jpg" >div><div class="na">小米电视6 至尊版 65英寸div><p>￥7999p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/home/cf71655746411c0f.jpg!cc_320x320.webp" >div><div class="na">亿田（entive）D2ZK 集成灶蒸烤一体div><p>￥13800p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/home/33508813f3a5059d.jpg" >div><div class="na">卡萨帝（Casarte）635升四开门十字对开门冰箱div><p>￥12499p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/home/181a74dccd6f4a71.jpg" >div><div class="na">西门子（SIEMENS）蒸烤箱一体机嵌入式div><p>￥7999p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/home/c7c15101f2c8a652a4a0d069501d1e53.jpg" >div><div class="na">小米电视6 至尊版 65英寸div><p>￥7999p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/home/cf71655746411c0f.jpg!cc_320x320.webp" >div><div class="na">亿田（entive）D2ZK 集成灶蒸烤一体div><p>￥13800p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/home/33508813f3a5059d.jpg" >div><div class="na">卡萨帝（Casarte）635升四开门十字对开门冰箱div><p>￥12499p>a>li>ul>div>div><div class="box_tit w"><h2 class="title">服饰h2><div class="nei_pohot"><ul><li class="phone_tu"><a href="#"><div class="ph"><img src="images/clothes/16fea7d7bb3f9144.jpg" >div><div class="na">梵希蔓垂感卡其色西装外套女div><p>￥299p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/clothes/7ea39f5f4878b162.jpg" >div><div class="na">海青蓝时尚通勤小西服女div><p>￥358p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/clothes/703d1f6c28d1c818.jpg" >div><div class="na">森马卫衣男2021秋新款oversize创意图案div><p>￥139p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/clothes/4cc75617291b3b63.jpg" >div><div class="na">Lilbetter情侣重磅卫衣男加绒div><p>￥215p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/clothes/16fea7d7bb3f9144.jpg" >div><div class="na">梵希蔓垂感卡其色西装外套女div><p>￥299p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/clothes/7ea39f5f4878b162.jpg" >div><div class="na">海青蓝时尚通勤小西服女div><p>￥358p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/clothes/703d1f6c28d1c818.jpg" >div><div class="na">森马卫衣男2021秋新款oversize创意图案div><p>￥139p>a>li><li class="phone_tu"><a href="#"><div class="ph"><img src="images/clothes/4cc75617291b3b63.jpg" >div><div class="na">Lilbetter情侣重磅卫衣男加绒div><p>￥215p>a>li>ul>div>div>div>div><div class="nav"><ul><li class="current">手机li><li>电脑li><li>家居li><li>服饰li><div class="back">返回顶部div>ul>div><div class="footer"><div class="translate"><div class="footer-links"><h5>购物指南h5><ul><li><a href="#">购物流程a>li><li><a href="#">会员介绍a>li><li><a href="#">生活旅行a>li><li><a href="#">常见问题a>li><li><a href="#">联系客服a>li>ul>div><div class="footer-links"><h5>支付方式h5><ul><li><a href="#">信用卡a>li><li><a href="#">货到付款a>li><li><a href="#">在线付款a>li><li><a href="#">分期付款a>li>ul>div><div class="footer-links"><h5>售后服务h5><ul><li><a href="#">售后政策a>li><li><a href="#">退款说明a>li><li><a href="#">返修/退换货a>li>ul>div><div class="footer-links"><h5>帮助中心h5><ul><li><a href="#">账户管理a>li><li><a href="#">自助服务a>li><li><a href="#">订单操作a>li><li><a href="#">服务网点a>li><li><a href="#">授权体验店/专区a>li>ul>div><div class="footer-links"><h5>关于我们h5><ul><li><a href="#">新浪微博a>li><li><a href="#">官方微信a>li><li><a href="#">联系我们a>li><li><a href="#">加入我们a>li><li><a href="#">公益基金会a>li>ul>div>div>div>body>html>

登录注册页面

在这里插入图片描述

登录注册页面.html

DOCTYPE html><html lang="en">    <head>        <meta charset="UTF-8">        <title>在线商城注册页面title>        <link rel="stylesheet" type="text/css" href="css/public.css"/>        <link rel="stylesheet" type="text/css" href="css/login.css"/>        <script src="js/jquery-3.6.0.js" type="text/javascript" charset="utf-8">script>        <script src="js/jquery.validate.min.js" type="text/javascript" charset="utf-8">script><script src="js/login.js" type="text/javascript" charset="utf-8">script>    head>    <body>        <div class="head">            <div class="shouye_head">                <a href="商城首页.html">商城首页a>            div>        div>        <div class="dowebok" id="dowebok">            <div class="fORM-container sign-up">                <form action="#" method="get" class="reGISter">                    <h1>注册h1>                    <input type="text"  id="username" name="username" placeholder="请输入用户名" /><input type="text"  id="user_id" name="user_id" placeholder="账号" />                    <input type="passWord" id="pwd" name="password" placeholder="请输入密码" />                    <input type="password" id="second_pwd" name="second_pwd" placeholder="请再次输入密码" /><input id="email" id="email" name="email" type="email" placeholder="请输入正确的邮箱格式"><input type="text" id="birth" name="birth" placeholder="出生日期 以YYYY-MM-DD格式" /><input type="text" id="phone" name="phone" placeholder="手机号码" /><input type="text" id="address" name="address" placeholder="收货地址" />                    <button>注册button>                form>            div>            <div class="form-container sign-in">                <form action="#" method="get" class="sign">                    <h1>登录h1>                    <input type="text" name="user_id" placeholder="账号">                    <input type="password"  name="password" placeholder="密码">                    <a href="###">忘记密码？a>                    <button>登录button>                form>            div>            <div class="overlay-container">                <div class="overlay">                    <div class="overlay-panel mask-left">                        <h1>已有帐号？h1>                        <p>请使用您的帐号进行登录p>                        <button class="ghost" id="signIn">登录button>                    div>                    <div class="overlay-panel mask-right">                        <h1>没有帐号？h1>                        <p>立即注册加入我们，和我们一起开始旅程吧p>                        <button class="ghost" id="signUp">注册button>                    div>                div>            div>        div>    body>html>

购物车页面

在这里插入图片描述
car.html

DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>商城购物车界面title><link rel="stylesheet" type="text/css" href="css/public.css"/><link rel="stylesheet" type="text/css" href="css/carts.css"/><script src="js/jquery-3.6.0.js" type="text/javascript" charset="utf-8">script><script src="js/cart.js" type="text/javascript" charset="utf-8">script>head><body><div class="head"><div class="shouye_head"><a href="商城首页.html">商城首页a>div>div><div class="cart"><div class="cart-head"><div class="column g-select"><div class="g-checkbox"><input type="checkbox" class="all each">div>全选div><div class="column g-images">图片div><div class="column g-Goodsname">商品名称div><div class="column g-props">商品信息div><div class="column g-price">单价div><div class="column g-quantity">数量div><div class="column g-sum">小计div><div class="column g-action">操作div>div><div class="carts-goods"><div class="cell c-select"><div class="c-checkbox"><input type="checkbox" class="each">div>div><div class="cell c-images"><a href="#" title="vue.js全家桶零基础入门到进阶项目实战"><img src="images/carts/f84ce8d17e55cf74.jpg" alt="Vue.js全家桶零基础入门到进阶项目实战">a>div><div class="cell c-goodsname"><a href="#" title="Vue.js全家桶零基础入门到进阶项目实战">Vue.js全家桶零基础入门到进阶项目实战a>div><div class="cell c-props">Vue.js全家桶零基础入门到进阶项目实战div><div class="cell c-price"><span>￥span><div class="c-price_num">99.20div>div><div class="cell c-quantity"><button type="button"  class="reduce">-button><input type="text" value="1" class="text_num"><button type="button" class="add">+button>div><div class="cell c-sum"><span>￥span><div class="c-sum_num">99.20div>div><div class="cell c-action"><a href="#" class="remove">移除商品a>div>div><div class="carts-goods"><div class="cell c-select"><div class="c-checkbox"><input type="checkbox" class="each">div>div><div class="cell c-images"><a href="#" title="CSS新世界"><img src="images/carts/8e7d4ce45fdacb89.jpg" alt="CSS新世界">a>div><div class="cell c-goodsname"><a href="#" title="CSS新世界">CSS新世界a>div><div class="cell c-props">CSS新世界div><div class="cell c-price"><span >￥span><div class="c-price_num">108.80div>div><div class="cell c-quantity"><button type="button" class="reduce">-button><input type="text" value="1" class="text_num"><button type="button" class="add">+button>div><div class="cell c-sum"><span>￥span><div class="c-sum_num">108.80div>div><div class="cell c-action"><a href="#" class="remove">移除商品a>div>div><div class="carts-goods"><div class="cell c-select"><div class="c-checkbox"><input type="checkbox" class="each">div>div><div class="cell c-images"><a href="book.html" title="CSS世界(异步图书出品)"><img src="images/188b8e81859a3051.jpg" alt="CSS新世界">a>div><div class="cell c-goodsname"><a href="book.html" title="CSS世界(异步图书出品)">CSS世界(异步图书出品)a>div><div class="cell c-props">CSS世界(异步图书出品)div><div class="cell c-price"><span >￥span><div class="c-price_num">57.80div>div><div class="cell c-quantity"><button type="button" class="reduce">-button><input type="text" value="1" class="text_num"><button type="button" class="add">+button>div><div class="cell c-sum"><span>￥span><div class="c-sum_num">57.80div>div><div class="cell c-action"><a href="#" class="remove">移除商品a>div>div>div><div class="payment"><div class="cart-pay"><div class="pay-left"><div class="select_all"><input type="checkbox" class="all each">全选div><div class="goods_num">已选择数量:<span>0span>件div>div><div class="pay-right"><div class="right_jie"><div class="btn"><a href="#">结算a>div><div class="price-sum"><div class="price-show">总价是：div><div class="show-money">￥<span>00.00span>div>div>div>div>div>div>body>html>

car.js
能够实现购物车中对商品的复选框全选、计算商品的数量小计，以及购物车中商品总价

$(function(){// $(".c-sum_num").click(function(){// console.info($(this).text());// })totl();goodsnum();// 全选$(".all").click(function() {let all = $(this).prop("checked")$(".each").each(function() {$(this).prop("checked", all);})})// 减少商品数量$(".reduce").click(function(){var num = $(this).siblings(".text_num").val();if(num>0){num--;$(this).siblings(".text_num").val(num);}var price=$(this).parents().siblings(".c-price").children(".c-price_num").text();var sum_num = $(this).parents().siblings(".c-sum").children(".c-sum_num");var sum = parseFloat(price*num);// console.log(sum);$(sum_num).text(sum);totl();goodsnum();});// 增加商品数量$(".add").click(function(){var num = $(this).siblings(".text_num").val();num++;$(this).siblings(".text_num").val(num);var price=$(this).parents().siblings(".c-price").children(".c-price_num").text();var sum_num = $(this).parents().siblings(".c-sum").children(".c-sum_num");var sum = parseFloat(price*num);// console.log(sum);$(sum_num).text(sum);totl();goodsnum();});// 删除商品$(".remove").click(function(){$(this).parents(".carts-goods").remove();totl();goodsnum();});// 总价function totl(){let sumprice = 0;$.each($(".c-sum_num"),function() {sumprice+=parseFloat($(this).text());$(".show-money span").text(sumprice);});}// 统计商品数量function goodsnum(){let goods_num=0;$.each($(".text_num"),function() {goods_num+=parseInt($(this).val());$(".goods_num span").text(goods_num);});}});

编写代码实现功能

连接数据库实现登录注册功能

user.java

package User;public class user {    private int user_id;    private String username;    private String password;    public int getId() {        return user_id;    }    public void setId(int id) {        this.user_id = user_id;    }    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;    }    @Override    public String toString() {        return "User [user_id=" + user_id + ", username=" + username + ", password=" + password + "]";    }    public user(int id, String username, String password, String address) {        super();        this.user_id = user_id;        this.username = username;    }    public user() {        super();    }}

RegisterController.java

package controller;import shop_servlet.Register;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 java.io.IOException;//import service.UserService2;@WebServlet("/register.do")public class RegisterController extends HttpServlet{    private static final long serialVersionUID = 7804524886360637172L;    public RegisterController() {        super();    }    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        try {            request.setCharacterEncoding("UTF-8");            response.setCharacterEncoding("UTF-8");            String username = request.getParameter("username");            String user_id = request.getParameter("user_id");            String password = request.getParameter("password");            String email = request.getParameter("email");            String birth = request.getParameter("birth");            String phone = request.getParameter("phone");            String address = request.getParameter("address");            Register userService = new  Register();            if(userService.register(username, user_id, password, email, birth, phone, address) > 0) {                response.getWriter().print("register success!");            }else {                response.getWriter().print("register false!");            }        } catch (Exception e) {            e.printStackTrace();        }    }    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        // TODO Auto-generated method stub        doGet(request, response);    }}

LoginController.java

package controller;import java.io.IOException;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 shop_servlet.Register;@WebServlet("/login.do")public class LoginController extends HttpServlet{    private static final long serialVersionUID = 7242872008838278971L;    public LoginController() {        super();    }    @Override    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        try {            String user_id = request.getParameter("user_id");            String password = request.getParameter("password");            Register userService = new  Register();            if(userService.login(user_id,password)) {                request.getSession().setAttribute("user_id", user_id);                response.sendRedirect("first.jsp");            }else {                response.getWriter().print("register false!");            }        }catch(Exception e) {            e.printStackTrace();        }    }    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        // TODO Auto-generated method stub        doGet(request, response);    }}

购物车连接数据库，将商品加入购物车后，能够查看商品详细信息

Car.java

package beans;public class Car {    private String goods_id;    private String  goods_name;    private String unitprice;    private String  quantity;    private String  userid;    private String pic;    public String getGoods_id() {        return goods_id;    }    public void setGoods_id(String goods_id) {        this.goods_id = goods_id;    }    public String getGoods_name() {        return goods_name;    }    public void setGoods_name(String goods_name) {        this.goods_name = goods_name;    }    public String getUnitprice() {        return unitprice;    }    public void setUnitprice(String unitprice) {        this.unitprice = unitprice;    }    public String getQuantity() {        return quantity;    }    public void setQuantity(String quantity) {        this.quantity = quantity;    }    public String getUserid() {        return userid;    }    public void setUserid(String userid) {        this.userid = userid;    }    public String getPic() {        return pic;    }    public void setPic(String pic) {        this.pic = pic;    }}

AddCarController.java

package controller;import beans.Car;import beans.Good;import utils.JDBCUtils;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 javax.servlet.http.HttpSession;import java.io.IOException;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.util.ArrayList;import java.util.List;//import service.UserService2;@WebServlet("/addcar.do")public class AddCarController extends HttpServlet{    private static final long serialVersionUID = 7804524886360637172L;    public AddCarController() {        super();    }    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        try {            request.setCharacterEncoding("UTF-8");            response.setCharacterEncoding("UTF-8");            HttpSession session= request.getSession();            String id = request.getParameter("id");            Object  user_id= session.getAttribute("user_id");            //1查询            //查询商品            String sql="SELECT * FROM goods WHERE goods_id=?";            Connection connection= JDBCUtils.getConnection();            PreparedStatement stmt =  connection.prepareStatement(sql);            stmt.setString(1, id);            ResultSet rs = stmt.executeQuery();            Good good=new Good();            while (rs.next()) {                good.setGoods_id(rs.getString("goods_id"));                good.setGoods_name(rs.getString("goods_name"));                good.setUnitprice(rs.getString("unitprice"));                good.setDetails(rs.getString("details"));                good.setPic(rs.getString("photo"));            }            //2添加到数据库            String sqladd="INSERT INTO car (goods_id, goods_name,unitprice,quantity,userid,pic) VALUES (?,?,?,?,?,?)";            stmt =  connection.prepareStatement(sqladd);            stmt.setString(1, good.getGoods_id());            stmt.setString(2,good.getGoods_name());            stmt.setString(3,good.getUnitprice());            stmt.setString(4,"1");            stmt.setString(5,user_id.toString());            stmt.setString(6, good.getPic());            int res=stmt.executeUpdate();//执行sql语句            if (res>0){                System.out.println("插入成功");            }            //3返回购物车            String carsql="select * from car where userid=?";            stmt =  connection.prepareStatement(carsql);            stmt.setString(1, user_id.toString());            //查询商品             rs = stmt.executeQuery();            Car car=null;            List<Car> carList=new ArrayList<>();            while (rs.next()) {                car=new Car();                car.setGoods_id(rs.getString("goods_id"));                car.setGoods_name(rs.getString("goods_name"));                car.setUnitprice(rs.getString("unitprice"));                car.setQuantity(rs.getString("quantity"));                car.setPic(rs.getString("pic"));                carList.add(car);            }            connection.close();            request.getSession().setAttribute("carList", carList);            response.sendRedirect("car.jsp");        } catch (Exception e) {            e.printStackTrace();        }    }    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        // TODO Auto-generated method stub        doGet(request, response);    }}

通过点击首页的商品图片，查看商品的详细信息

Goods.java

package beans;public class Good {    private String goods_id;    private String goods_name;    private String unitprice;    private String details;    private String pic;    public String getPic() {        return pic;    }    public void setPic(String pic) {        this.pic = pic;    }    public String getGoods_id() {        return goods_id;    }    public void setGoods_id(String goods_id) {        this.goods_id = goods_id;    }    public String getGoods_name() {        return goods_name;    }    public void setGoods_name(String goods_name) {        this.goods_name = goods_name;    }    public String getUnitprice() {        return unitprice;    }    public void setUnitprice(String unitprice) {        this.unitprice = unitprice;    }    public String getDetails() {        return details;    }    public void setDetails(String details) {        this.details = details;    }    @Override    public String toString() {        return "User [goods_id=" + goods_id + ", goods_name=" + goods_name + ", unitprice=" + unitprice + ", details=" + details + "]";    }    public Good(String goods_id, String goods_name, String unitprice, String details) {        super();        this.goods_id = goods_id;        this.goods_name = goods_name;        this.unitprice = unitprice;        this.details = details;    }    public Good() {        super();    }}

DetailController.java

package controller;import beans.Good;import utils.JDBCUtils;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 java.io.IOException;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;//import service.UserService2;@WebServlet("/detail.do")public class DetailController extends HttpServlet{    private static final long serialVersionUID = 7804524886360637172L;    public DetailController() {        super();    }    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        try {            String id = request.getParameter("id");            request.setCharacterEncoding("UTF-8");            response.setCharacterEncoding("UTF-8");            //查询商品            String sql="SELECT * FROM goods WHERE goods_id=?";            Connection connection= JDBCUtils.getConnection();            PreparedStatement stmt =  connection.prepareStatement(sql);            stmt.setString(1, id);            ResultSet rs = stmt.executeQuery();            Good good=new Good();            while (rs.next()) {                good.setGoods_id(rs.getString("goods_id"));                good.setGoods_name(rs.getString("goods_name"));                good.setUnitprice(rs.getString("unitprice"));                good.setDetails(rs.getString("details"));                good.setPic(rs.getString("photo"));            }            connection.close();            request.getSession().setAttribute("good", good);            response.sendRedirect("phone.jsp");        } catch (Exception e) {            e.printStackTrace();        }    }    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        // TODO Auto-generated method stub        doGet(request, response);    }}