Java 实战项目锤炼之网上商城系统的实现流程

一、项目简述（+需求文档+PPT）

功能： 主页显示热销商品；所有商品展示，可进行商品搜索；点 击商品进入商品详情页，显示库存，具有立即购买和加入 购物车功能，可增减购买商品数量亦可手动输入（同时验证 库存），热销商品展示。立即购买进入确认订单页面，可选 择已经添加的地址，亦可新增地址。（同时验证库存），可 选择购买哪些商品，可删除不需要的商品。点击结算进入 确认订单页面，确认后提交订单，订单重复提交给予响 应，库存不足或商品下架给予响应。后台管理：（修改密码 等），商品管理（商品批量添加、上下架、库存维护等）， 订单管理。

二、项目运行

环境配置： Jdk1.8 + Tomcat8.5 + mysql + Eclispe （ IntelliJ IDEA,Eclispe,MyEclispe,Sts 都支持）

项目技术： JSP + C3P0+ Servlert + html+ css + JavaScript + JQuery + Ajax + Fileupload等等。

后台管理-主页操作代码：

/**
 * 后台管理-主页
 */
@Controller
public class AdminHomeController extends BaseController {
    @Resource(name = "adminService")
    private AdminService adminService;
    @Resource(name = "productOrderService")
    private ProductOrderService productOrderService;
    @Resource(name = "productService")
    private ProductService productService;
    @Resource(name = "userService")
    private UserService userService;

    /**
     * 转到后台管理-主页
     * @param session session对象
     * @param map 前台传入的Map
     * @return 响应数据
     * @throws ParseException 转换异常
     */
    @RequestMapping(value = "admin", method = RequestMethod.GET)
    public String goToPage(HttpSession session, Map<String, Object> map) throws ParseException {
        logger.info("获取管理员信息");
        Object adminId = checkAdmin(session);
        if (adminId == null) {
            return "redirect:/admin/login";
        }
        Admin admin = adminService.get(null, Integer.parseInt(adminId.toString()));
        map.put("admin", admin);
        logger.info("获取统计信息");
        //产品总数
        Integer productTotal = productService.getTotal(null, new Byte[]{0, 2});
        //用户总数
        Integer userTotal = userService.getTotal(null);
        //订单总数
        Integer orderTotal = productOrderService.getTotal(null, new Byte[]{3});
        logger.info("获取图表信息");
        map.put("jsonObject", getChartData(null,null,7));
        map.put("productTotal", productTotal);
        map.put("userTotal", userTotal);
        map.put("orderTotal", orderTotal);

        logger.info("转到后台管理-主页");
        return "admin/homePage";
    }

    /**
     * 转到后台管理-主页（ajax方式）
     * @param session session对象
     * @param map 前台传入的Map
     * @return 响应数据
     * @throws ParseException 转换异常
     */
    @RequestMapping(value = "admin/home", method = RequestMethod.GET)
    public String goToPageByAjax(HttpSession session, Map<String, Object> map) throws ParseException {
        logger.info("获取管理员信息");
        Object adminId = checkAdmin(session);
        if (adminId == null) {
            return "admin/include/loginMessage";
        }
        Admin admin = adminService.get(null, Integer.parseInt(adminId.toString()));
        map.put("admin", admin);
        logger.info("获取统计信息");
        Integer productTotal = productService.getTotal(null, new Byte[]{0, 2});
        Integer userTotal = userService.getTotal(null);
        Integer orderTotal = productOrderService.getTotal(null, new Byte[]{3});
        logger.info("获取图表信息");
        map.put("jsonObject", getChartData(null, null,7));
        logger.info("获取图表信息");
        map.put("jsonObject", getChartData(null,null,7));
        map.put("productTotal", productTotal);
        map.put("userTotal", userTotal);
        map.put("orderTotal", orderTotal);
        logger.info("转到后台管理-主页-ajax方式");
        return "admin/homeManagePage";
    }

    /**
     * 按日期查询图表数据（ajax方式）
     * @param beginDate 开始日期
     * @param endDate 结束日期
     * @return 响应数据
     * @throws ParseException 转换异常
     */
    @ResponseBody
    @RequestMapping(value = "admin/home/charts", method = RequestMethod.GET, produces = "application/json;charset=utf-8")
    public String getChartDataByDate(@RequestParam(required = false) String beginDate, @RequestParam(required = false) String endDate) throws ParseException {
        if (beginDate != null && endDate != null) {
            //转换日期格式
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            return getChartData(simpleDateFormat.parse(beginDate), simpleDateFormat.parse(endDate),7).toJSONString();
        } else {
            return getChartData(null, null,7).toJSONString();
        }
    }

    /**
     * 按日期获取图表数据
     * @param beginDate 开始日期
     * @param endDate 结束日期
     * @param days 天数
     * @return 图表数据的JSON对象
     * @throws ParseException 转换异常
     */
    private JSONObject getChartData(Date beginDate,Date endDate,int days) throws ParseException {
        JSONObject jsonObject = new JSONObject();
        SimpleDateFormat time = new SimpleDateFormat("yyyy-MM-dd", Locale.UK);
        SimpleDateFormat time2 = new SimpleDateFormat("MM/dd", Locale.UK);
        SimpleDateFormat timeSpecial = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.UK);
        //如果没有指定开始和结束日期
        if (beginDate == null || endDate == null) {
            //指定一周前的日期为开始日期
            Calendar cal = Calendar.getInstance();
            cal.add(Calendar.DATE, 1-days);
            beginDate = time.parse(time.format(cal.getTime()));
            //指定当前日期为结束日期
            cal = Calendar.getInstance();
            endDate = cal.getTime();
        } else {
            beginDate = time.parse(time.format(beginDate));
            endDate = timeSpecial.parse(time.format(endDate) + " 23:59:59");
        }
        logger.info("根据订单状态分类");
        //未付款订单数统计数组
        int[] orderUnpaidArray = new int[7];
        //未发货订单数统计叔祖
        int[] orderNotShippedArray = new int[7];
        //未确认订单数统计数组
        int[] orderUnconfirmedArray = new int[7];
        //交易成功订单数统计数组
        int[] orderSuccessArray = new int[7];
        //总交易订单数统计数组
        int[] orderTotalArray = new int[7];
        logger.info("从数据库中获取统计的订单集合数据");
        List<OrderGroup> orderGroupList = productOrderService.getTotalByDate(beginDate, endDate);
        //初始化日期数组
        JSONArray dateStr = new JSONArray(days);
        //按指定的天数进行循环
        for (int i = 0; i < days; i++) {
            //格式化日期串（MM/dd）并放入日期数组中
            Calendar cal = Calendar.getInstance();
            cal.setTime(beginDate);
            cal.add(Calendar.DATE, i);
            String formatDate = time2.format(cal.getTime());
            dateStr.add(formatDate);
            //该天的订单总数
            int orderCount = 0;
            //循环订单集合数据的结果集
            for(int j = 0; j < orderGroupList.size(); j++){
                OrderGroup orderGroup = orderGroupList.get(j);
                //如果该订单日期与当前日期一致
                if(orderGroup.getProductOrder_pay_date().equals(formatDate)){
                    //从结果集中移除数据
                    orderGroupList.remove(j);
                    //根据订单状态将统计结果存入对应的订单状态数组中
                    switch (orderGroup.getProductOrder_status()) {
                        case 0:
                            //未付款订单
                            orderUnpaidArray[i] = orderGroup.getProductOrder_count();
                            break;
                        case 1:
                            //未发货订单
                            orderNotShippedArray[i] = orderGroup.getProductOrder_count();
                            break;
                        case 2:
                            //未确认订单
                            orderUnconfirmedArray[i] = orderGroup.getProductOrder_count();
                            break;
                        case 3:
                            //交易成功订单
                            orderSuccessArray[i] = orderGroup.getProductOrder_count();
                            break;
                    }
                    //累加当前日期的订单总数
                    orderCount += orderGroup.getProductOrder_count();
                }
            }
            //将统计的订单总数存入总交易订单数统计数组
            orderTotalArray[i] = orderCount;
        }
        logger.info("返回结果集map");
        jsonObject.put("orderTotalArray", orderTotalArray);
        jsonObject.put("orderUnpaidArray", orderUnpaidArray);
        jsonObject.put("orderNotShippedArray", orderNotShippedArray);
        jsonObject.put("orderUnconfirmedArray", orderUnconfirmedArray);
        jsonObject.put("orderSuccessArray", orderSuccessArray);
        jsonObject.put("dateStr",dateStr);
        return jsonObject;
    }
}

前台主页代码：

/**
 * 主页
 */
@Controller
public class ForeHomeController extends BaseController {
    @Resource(name = "userService")
    private UserService userService;
    @Resource(name="categoryService")
    private CategoryService categoryService;
    @Resource(name="productService")
    private ProductService productService;
    @Resource(name="productImageService")
    private ProductImageService productImageService;

    //转到前台天猫-主页
    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String goToPage(HttpSession session, Map<String, Object> map) {
        logger.info("检查用户是否登录");
        Object userId = checkUser(session);
        if (userId != null) {
            logger.info("获取用户信息");
            User user = userService.get(Integer.parseInt(userId.toString()));
            map.put("user", user);
        }
        logger.info("获取产品分类列表");
        List<Category> categoryList = categoryService.getList(null,null);
        logger.info("获取每个分类下的产品列表");
       for(Category category : categoryList){
           List<Product> productList = productService.getList(
                   new Product().setProduct_category(category),
                   new Byte[]{0, 2},
                   new OrderUtil("product_sale_count", true), new PageUtil(0, 8)
           );
           if (productList != null) {
               for (Product product : productList) {
                   Integer product_id = product.getProduct_id();
                   product.setSingleProductImageList(
                           productImageService.getList(
                                   product_id, (byte) 0, new PageUtil(0, 1)
                           )
                   );
               }
           }
           category.setProductList(productList);
       }
        map.put("categoryList",categoryList);
        logger.info("获取促销产品列表");
        List<Product> specialProductList = productService.getList(
                null, new Byte[]{2}, null, new PageUtil(0, 6)
        );
        map.put("specialProductList", specialProductList);

        logger.info("转到前台主页");
        return "fore/homePage";
    }

    //转到前台天猫-错误页
    @RequestMapping(value = "error", method = RequestMethod.GET)
    public String goToErrorPage() {
        return "fore/errorPage";
    }

    //获取主页分类下产品信息-ajax
    @ResponseBody
    @RequestMapping(value = "product/nav/{category_id}", method = RequestMethod.GET, produces = "application/json;charset=utf-8")
    public String getProductByNav(@PathVariable("category_id") Integer category_id) {
        JSONObject object = new JSONObject();
        if (category_id == null) {
            object.put("success", false);
            return object.toJSONString();
        }
        logger.info("获取分类ID为{}的产品标题数据", category_id);
        List<Product> productList = productService.getTitle(
                new Product().setProduct_category(new Category().setCategory_id(category_id)),
                new PageUtil(0, 40)
        );
        List<List<Product>> complexProductList = new ArrayList<>(8);
        List<Product> products = new ArrayList<>(5);
        for (int i = 0; i < productList.size(); i++) {
            //如果临时集合中产品数达到5个，加入到产品二维集合中，并重新实例化临时集合
            if (i % 5 == 0) {
                complexProductList.add(products);
                products = new ArrayList<>(5);
            }
            products.add(productList.get(i));
        }
        complexProductList.add(products);
        Category category = new Category().setCategory_id(category_id).setComplexProductList(complexProductList);
        object.put("success", true);
        object.put("category", category);
        return object.toJSONString();
    }
}

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