家居网购项目实现010

以下皆为部分代码，详见 https://github.com/liyuelian/furniture_mall.git

24.bugFix-添加购物车按钮动态处理

24.1需求分析/图解

1. 如某个家居的库存量为0，前台的“add to cart”按钮显示为“暂时缺货”
2. 后台也要求添加校验，只有在库存>0时，才能添加到购物车

24.2代码实现

1. 修改customer/index.jsp

   

2. CartServlet添加判断，如果在添加购物车时，该家居库存为0，就停止业务

   

24.3完成测试

25.功能23-附加功能-订单管理

25.1需求分析/图解

点击订单管理，前往order.jsp页面进行订单管理

点击详情的眼睛图标，可以显示该订单详情，即显示某个订单的所有订单项

25.2思路分析

点击订单管理按钮，跳转到订单管理页面order.jsp。根据用户id，在订单管理页面中显示用户对应的订单。点击订单详情，跳转到order_detail.jsp中，根据订单号显示订单所有项。

25.3代码实现

25.3.1dao层

OrderDAO

/**
 * 根据用户id，查询该用户的所有订单Order
 *
 * @param id 用户id
 * @return 返回订单
 */
public List<Order> queryOrderByMemberId(int id);

OrderDAOImpl

@Override
public List<Order> queryOrderByMemberId(int id) {
    String sql = "SELECT `id`,`create_time` AS createTime,`price`,`status`,`member_id` AS memberId " +
            "FROM `order` " +
            "WHERE `member_id`=?";
    return queryMulti(sql, Order.class, id);
}

test包-OrderDAOImplTest

@Test
public void queryOrderByMemberId() {
    List<Order> orders = orderDAO.queryOrderByMemberId(2);
    for (Order order : orders) {
        System.out.println(order);
    }
}

OrderItemDAO

/**
 * 根据订单id-orderId查询对应的表单项orderItem
 *
 * @param orderId 订单id
 * @return 返回表单项orderItem
 */
public List<OrderItem> queryOrderItemByOrderId(String orderId);

OrderItemDAOImpl

@Override
public List<OrderItem> queryOrderItemByOrderId(String orderId) {
    String sql =
            "SELECT `id`,`name`,`price`,`count`,`total_price` AS totalPrice,`order_id` AS orderId " +
                    "FROM `order_item` " +
                    "WHERE `order_id`=?";
    return queryMulti(sql, OrderItem.class, orderId);
}

OrderItemDAOImplTest

@Test
public void queryOrderItemByOrderId() {
    List<OrderItem> orderItems = orderItemDAO.queryOrderItemByOrderId("16722358644142");
    for (OrderItem orderItem : orderItems) {
        System.out.println(orderItem);
    }
}

25.3.2service层

OrderService

/**
 * 根据用户id返回订单order
 * @param id 用户id
 * @return 订单
 */
public List<Order> queryOrderByMemberId(int id);
/**
* 根据订单id返回对应的订单项orderItem
* @param orderId 订单id
* @return 返回订单项
*/
public List<OrderItem> queryOrderItemByOrderId(String orderId);

OrderServiceImpl

@Override
public List<Order> queryOrderByMemberId(int id) {
    return orderDAO.queryOrderByMemberId(id);
}
@Override
public List<OrderItem> queryOrderItemByOrderId(String orderId) {
    return orderItemDAO.queryOrderItemByOrderId(orderId);
}

test包-OrderServiceImpl

@Test
public void queryOrderByMemberId() {
    List<Order> orders = orderService.queryOrderByMemberId(3);
    for (Order order : orders) {
        System.out.println(order);
    }
}
@Test
public void queryOrderItemByOrderId() {
    List<OrderItem> orderItems = orderService.queryOrderItemByOrderId("16722370522643");
    for (OrderItem orderItem : orderItems) {
        System.out.println(orderItem);
    }
}

25.3.3web层

OrderServlet，增加两个方法

/**
 * 显示订单order
 *
 * @param req
 * @param resp
 * @throws ServletException
 * @throws IOException
 */
protected void showOrder(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    //获取当前用户id
    Member member = (Member) req.getSession().getAttribute("member");
    if (member == null) {
        //重定向到登录页面
        resp.sendRedirect(req.getContextPath() + "/views/member/login.jsp");
        return;
    }
    int id = DataUtils.parseInt(member.getId().toString(), 0);
    //根据用户id查询对应的订单
    List<Order> orders = orderService.queryOrderByMemberId(id);
    //将订单数据返回显示
    req.setAttribute("orders", orders);
    //请求转发到order.jsp显示
    req.getRequestDispatcher("/views/order/order.jsp").forward(req, resp);
}
/**
 * 显示订单项orderItem
 *
 * @param req
 * @param resp
 * @throws ServletException
 * @throws IOException
 */
protected void showOrderItem(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    //获取当前orderid
    String orderId = req.getParameter("orderId");
    //根据orderId返回对应的订单项orderItem
    List<OrderItem> orderItems = orderService.queryOrderItemByOrderId(orderId);
    //计算该order中所有orderItem的总商品数量和总价格
    Integer totalCount = 0;
    BigDecimal totalPrice = BigDecimal.valueOf(0);
    for (OrderItem orderItem : orderItems) {
        totalCount += orderItem.getCount();
        totalPrice = totalPrice.add(orderItem.getTotalPrice());
    }
    System.out.println("totalCount=>" + totalCount);
    System.out.println("totalPrice=>" + totalPrice);
    //将订单项数据返回显示
    //订单id
    req.setAttribute("orderId", orderId);
    //订单商品总数
    req.setAttribute("totalCount", totalCount);
    //订单商品总额
    req.setAttribute("totalPrice", totalPrice);
    //订单项
    req.setAttribute("orderItems", orderItems);
    //请求转发到order_detail.jsp
    req.getRequestDispatcher("/views/order/order_detail.jsp").forward(req, resp);
}

25.3.4前端页面修改

略

25.4完成测试

用户只有在登录情况下但能进入订单管理

点击详情的眼睛图案，即可查看该订单详情