JavaWeb：实现购物商城（课程设计完整版）

雨点打透心脏的1/2处 2024-03-26 10:55 53阅读 0赞

## 前言 ##

做一个javaweb可以对前后端基础知识进行巩固。  
就比如 前端可以用 html+css+js+jQuery；  
后端Http协议，Servlet基础，JSP技术，Mysql等  
该程序做的这个就相对比较基础，适合大学生当课程设计用  
在文章结尾附项目源代码和素材

## 一、功能概述 ##

1.  购物商城分为 管理员 和 普通用户 页面
2.  用户可以自行注册登录
3.  用户可以 加入商品到购物车中，可以查看商品的详情
4.  管理员可以对 商品进行增删改查，就比如发布商品，下架商品，修改商品，搜索商品。

## 二、代码分析 ##

![在这里插入图片描述][03bae521acb24ef3af1f52088bafabb1.png]

1.  action层：管理业务调度和管理跳转的，即处理逻辑问题
2.  bean层：封装数据，设置数据的属性和行为
3.  biz层：接受数据库的处理结果并且返回给前端
4.  dao层：对数据库进行增删改查
5.  util层： 是一个多功能，基于工具的包。比如字符串处理，JDBC连接等

## 三、项目展示 ##

因为艺术细胞太少，所以前端页面设计的比较难看，大家可以自行修改也可以在评论区提出意见，或联系我修改。

### 1.登录和注册 ###

![在这里插入图片描述][27769e4789a0474aaab26dee4e510596.png]  
![在这里插入图片描述][de6a209831c64e959b0e6dcc6bb300ae.png]

### 2.普通用户页面 ###

![在这里插入图片描述][34b22471d7b6405eb64301eb94636f87.png]

### 3.商品详情页 ###

![在这里插入图片描述][4322efd82e894cadad28d658da508eff.png]

### 4.购物车 ###

![在这里插入图片描述][76766c4f9b804ee98fb4f2fad93a081a.png]

### 5.管理员页面 ###

![在这里插入图片描述][709a89a23237463389d16f00fdf4fcc4.png]

### 6. 发布商品页面 ###

![在这里插入图片描述][bc1e93a675d3475f90694578ad3d27f0.png]

### 7. 修改商品页面 ###

![在这里插入图片描述][b9915667a88c4c4b80c274aafd58b598.png]

### 8.商品数据库 ###

![在这里插入图片描述][7c300ba34237428c8e1e29f881dcd535.png]

## 四、部分代码展示 ##

### 1.登录和注册 ###

//1.判读用户请求的类型为login
            String method = req.getParameter("type");
            switch (method) {
                case "login":
                    // 从 login.html中 拿 账号，密码等数据
                    String name = req.getParameter("name");
                    String pwd = req.getParameter("pwd");
    
                    //  调用UserBiz的getUser方法，根据 网页中 输入的账号密码，获取相应对象
                    User user = userBiz.getUser(name,pwd);
    
                     //判断 获取到的对象是否为 null;
                     if (user == null) {
                         System.out.println(user);
                         out.println("<script>alert('用户名或密码不存在');location.href = 'login.html';</script>");
                     }else {
    
                         session.setAttribute("user",user);//user-->Object
                         out.println("<script>alert('登录成功');location.href='/UserShow';</script>");
                     }
    
                     break;
                case "register" :
    
                    // 从 login.html中 拿 账号，密码等数据
                    String name1 = req.getParameter("name");
                    String pwd1 = req.getParameter("pwd");
                    UserDao userDao = new UserDao();
                    try {
                        userDao.setUser(name1,pwd1);
                    } catch (SQLException throwables) {
                        throwables.printStackTrace();
                    }
                    out.println("<script>alert('注册成功');location.href = 'login.html';</script>");
                    break;

### 2.修改商品 ###

req.setCharacterEncoding("utf-8");
            resp.setContentType("text/html;charset=utf-8");
            PrintWriter out = resp.getWriter();
    
            CommodityDao commodityDao = new CommodityDao();
    
            String temp = req.getParameter("mod");
            int temp1 = 0;
    
            if (temp!=null) {
                temp1=Integer.parseInt(temp);
            }
    
            DiskFileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);
            String imgPath="";
    
            try {
                String name ="";
                String price = "";
                String introduce = "";
                String path="";
                List<FileItem> list = upload.parseRequest(req);
    
                for (FileItem item : list) {
    
                    if (item.isFormField()){
                        switch (item.getFieldName()){
                            case "mod" :
                                temp1 = Integer.parseInt(item.getString("utf-8"));
                                break;
                            case "name" :
                                name = item.getString("utf-8");
                                break;
                            case "price" :
                                price = item.getString("utf-8");
                                break;
                            case "introduce" :
                                introduce = item.getString("utf-8");
                                break;
                        }
                    }else {
                        // 拿到文件的名称
                        String fileName = item.getName();
                        // 时间戳唯一 唯一的fileName
    
                        fileName=fileName.substring(fileName.lastIndexOf("."));
    
                        fileName=System.currentTimeMillis()+fileName;
    
                        imgPath="Mysql_imgs/"+fileName;
    
                        // 拿到文件存储的路径
                        path = "D:\\IdeaProjects\\mydemo\\web\\Mysql_imgs\\"+fileName;
                        // 创建读写流
                        InputStream in = item.getInputStream();
                        FileOutputStream outt = new FileOutputStream(path);
                        // 完成读写操作
                        byte [] buffer = new byte[1024];
                        int len = 0 ;
                        while ((len = in.read(buffer)) > 0) {
                            outt.write(buffer);
                        }
                        // 关闭资源
                        in.close();
                        outt.close();
                        item.delete();
    
                    }
    
                    System.out.println(temp1 +" "+name +" "+price +" "+introduce +" "+imgPath );
                    if (name!=""&&price!=""&&introduce!=""&&imgPath!="") {
    
                        try {
                            commodityDao.modCommodity(temp1,name,price,introduce,imgPath);
                        } catch (SQLException throwables) {
                            throwables.printStackTrace();
                        }
    
                        out.println("<script>alert('修改成功');location.href = 'index';</script>");
                    }
    
    
                }
    
            } catch (FileUploadException e) {
                e.printStackTrace();
            }

### 3. 发布商品 ###

DiskFileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);
            CommodityDao commodityDao = new CommodityDao();
            String imgPath="";
    
            try {
                String name ="";
                String price = "";
                String introduce = "";
                String path="";
                List<FileItem> list = upload.parseRequest(req);
                for (FileItem item : list) {
    
    
                    if (item.isFormField()){
                        switch (item.getFieldName()){
                            case "name" :
                       name = item.getString("utf-8");
                                break;
                            case "price" :
                                 price = item.getString("utf-8");
                                break;
                            case "introduce" :
                                introduce = item.getString("utf-8");
                                break;
                        }
                    }else {
                        // 拿到文件的名称
                        String fileName = item.getName();
                        // 时间戳唯一 唯一的fileName
    
                        fileName=fileName.substring(fileName.lastIndexOf("."));
    
                        fileName=System.currentTimeMillis()+fileName;
    
                        imgPath="Mysql_imgs/"+fileName;
    
                        // 拿到文件存储的路径
                        path = "D:\\IdeaProjects\\mydemo\\web\\Mysql_imgs\\"+fileName;
                        // 创建读写流
                        InputStream in = item.getInputStream();
                        FileOutputStream outt = new FileOutputStream(path);
                        // 完成读写操作
                        byte [] buffer = new byte[1024];
                        int len = 0 ;
                        while ((len = in.read(buffer)) > 0) {
                            outt.write(buffer);
                        }
                        // 关闭资源
                        in.close();
                        outt.close();
                        item.delete();
    
                    }
    
    
    
    
                    if (name!=""&&price!=""&&introduce!=""&&imgPath!="") {
    //                    System.out.println(name+" ; "+price+" ; "+introduce+" ; "+imgPath);
                        try {
                            commodityDao.setCommodity(name,price,introduce,imgPath);
                        } catch (SQLException throwables) {
                            throwables.printStackTrace();
                        }
    
                        out.println("<script>alert('添加成功');location.href = 'index';</script>");
                    }
    
    
                }
    
    
            } catch (FileUploadException e) {
                e.printStackTrace();
            }

### 4. 购物车页面 ###

<body>
    <div class="divv">
        <div class="head">
            <a href="/UserShow">首页</a>
        </div>
        <div class="contain">
            <div class="con">
                <div class="con_div1">
                    <span style="margin-left: 350px;">商品信息</span>
                    <span style="margin-left: 170px;">数量</span>
                    <span style="margin-left: 150px;">金额</span>
                    <span style="float: right;margin-right: 138px;">操作</span>
                </div>
                <c:forEach items="${Arraylist}" var="user">
                    <div class="con_div">
    
                        <div class="con_div_div1"> <img src="${user.img}" alt="" class="con_div_img"></div>
                        <div class="con_div_div2">${user.introduce}</div>
                        <div class="con_div2">
                            <a href="/carjian?id=${user.id}&amount=${user.amount}" class="con_div2_a1">-</a>
                            <span class="con_div2_in1">${user.amount}</span>
                            <a href="/carjia?id=${user.id}&amount=${user.amount}" class="con_div2_a2">+</a>
                        </div>
                        <span class="con_div_s3">¥</span>
                        <span class="con_div_s2">${user.price}</span>
                        <a href="/delcar?id=${user.id}" class="con_div_a1">移除</a>
                    </div>
    
    
                </c:forEach>
                <div class="con_end">
                    <span class="con_end_s1">合计: </span>
                    <em class="con_end_em">0.00</em>
                    <a href="" class="con_end_a1">结算</a>
                </div>
    
            </div>
        </div>
    
    </div>
    <script>
        let gets = document.getElementsByClassName("con_div_s2");
        let amounts = document.getElementsByClassName("con_div2_in1");
        let sum = 0;
        for (let i = 0; i < gets.length; i++) {
            sum += parseInt(gets[i].innerHTML) * parseInt(amounts[i].innerHTML);
        }
    
        document.getElementsByClassName("con_end_em")[0].innerHTML = sum;
    
    
    </script>
    </body>

## 五、总结感想 ##

这个项目，后端处理的还行，但是由于头脑简单，所以把前端页面设计的比较难看，大家多包涵，可以自行修改或者联系我修改。  
如果在学习过程中有任何问题都可在评论区指出。

## 六、完整源代码和素材 ##

链接：https://pan.baidu.com/s/13MG5R\_xrLWQrxcf7sBtt7g?pwd=ojbk  
提取码：ojbk

[03bae521acb24ef3af1f52088bafabb1.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/5a4447986aac4f09882cb6680821965d.png
[27769e4789a0474aaab26dee4e510596.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/9226f10773c8440caa2d42767619cbdb.png
[de6a209831c64e959b0e6dcc6bb300ae.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/874bc6d53331454391e4531bfffd4ba4.png
[34b22471d7b6405eb64301eb94636f87.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/d5237f12f028469686863eff6fbd1f02.png
[4322efd82e894cadad28d658da508eff.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/0d9f39910b8d4b0a9103114ef2307c35.png
[76766c4f9b804ee98fb4f2fad93a081a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/565d790fae184b859945a3aaa1c0e31c.png
[709a89a23237463389d16f00fdf4fcc4.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/bf9ac4ad61144e79a4b3018de930d6fc.png
[bc1e93a675d3475f90694578ad3d27f0.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/aa650ffd4fcb4d3f96f6c6ac18eb2b94.png
[b9915667a88c4c4b80c274aafd58b598.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/260d74e263784ac398b0ec03a9e7a1e9.png
[7c300ba34237428c8e1e29f881dcd535.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/edf4e70b55304fd087adc951bc43a9a2.png