苍穹外卖--用户下单功能实现

sky-server/src/main/java/com/sky/service/OrderService.java

@@ -0,0 +1,13 @@
+package com.sky.service;
+
+import com.sky.dto.OrdersSubmitDTO;
+import com.sky.vo.OrderSubmitVO;
+
+public interface OrderService {
+    /**
+     * 用户下单
+     * @param ordersSubmitDTO
+     * @return
+     */
+    OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO);
+}

sky-server/src/main/java/com/sky/service/impl/OrderServiceImpl.java

@@ -0,0 +1,100 @@
+package com.sky.service.impl;
+
+import com.sky.constant.MessageConstant;
+import com.sky.context.BaseContext;
+import com.sky.dto.OrdersSubmitDTO;
+import com.sky.entity.AddressBook;
+import com.sky.entity.OrderDetail;
+import com.sky.entity.Orders;
+import com.sky.entity.ShoppingCart;
+import com.sky.exception.AddressBookBusinessException;
+import com.sky.exception.ShoppingCartBusinessException;
+import com.sky.mapper.AddressBookMapper;
+import com.sky.mapper.OrderDetailMapper;
+import com.sky.mapper.OrderMapper;
+import com.sky.mapper.ShoppingCartMapper;
+import com.sky.service.OrderService;
+import com.sky.vo.OrderSubmitVO;
+import org.springframework.beans.BeanUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.List;
+
+@Service
+public class OrderServiceImpl implements OrderService {
+
+    @Autowired
+    private OrderMapper orderMapper;
+
+    @Autowired
+    private AddressBookMapper addressBookMapper;
+
+    @Autowired
+    private ShoppingCartMapper shoppingCartMapper;
+
+    @Autowired
+    private OrderDetailMapper orderDetailMapper;
+
+    /**
+     * 用户下单
+     * @param ordersSubmitDTO
+     * @return
+     */
+    @Transactional  //让订单表 订单明细表 购物车表的sql操作同时成功或失败
+    @Override
+    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {
+        //1.处理各种业务异常（地址簿为空，购物车中数据为空）
+        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
+        if (addressBook == null) {
+            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
+        }
+        ShoppingCart cart = new ShoppingCart();
+        cart.setUserId(BaseContext.getCurrentId());
+        List<ShoppingCart> cartList = shoppingCartMapper.list(cart);
+        if (cartList == null || cartList.size() == 0) {
+            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
+        }
+
+        //2.向订单表orders中插入一条数据
+        Orders orders = new Orders();
+        BeanUtils.copyProperties(ordersSubmitDTO,orders);
+        orders.setOrderTime(LocalDateTime.now());//下单时间
+        orders.setPayStatus(Orders.UN_PAID);//支付状态
+        orders.setStatus(Orders.PENDING_PAYMENT);//订单状态
+        orders.setNumber(String.valueOf(System.currentTimeMillis()));//订单号
+        orders.setPhone(addressBook.getPhone());//手机号
+        orders.setConsignee(addressBook.getConsignee());//收货人
+        orders.setUserId(BaseContext.getCurrentId());
+        orders.setAddress(addressBook.getProvinceName()+addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail());//详细地址：省市区+地址
+
+        orderMapper.insert(orders);
+
+        //3.向订单明细表插入N条商品明细记录
+        ArrayList<OrderDetail> orderDetails = new ArrayList<>();//订单明细集合
+        for (ShoppingCart shoppingCart : cartList) {
+            OrderDetail orderDetail = new OrderDetail();
+            BeanUtils.copyProperties(shoppingCart,orderDetail);
+            //动态设置订单明细属于哪个订单
+            orderDetail.setOrderId(orders.getId());
+            orderDetails.add(orderDetail);
+        }
+
+        //批量插入数据
+        orderDetailMapper.insertBatch(orderDetails);
+
+        //4.清空当前用户的购物车数据
+        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());
+
+        //5.封装一个标准OrderSubmitVO返回给前端显示内容
+        OrderSubmitVO submitVO = OrderSubmitVO.builder()
+                .id(orders.getId())
+                .orderNumber(orders.getNumber())
+                .orderAmount(orders.getAmount())
+                .orderTime(orders.getOrderTime()).build();
+        return submitVO;
+    }
+}