实习知识整理11：确认订单并将订单的相关信息插入用户订单表和订单详情表

用户订单表：

订单详情表：

思路分析：首先我们需要知道当点击了确认订单按钮后，需要向后端传递哪些数据，先看用户订单表：ORDER_ID是不需要传的，这个可以在后台生成就行了；USER_ID是需要传的；ADDRESS_ID也是需要传的；ORDER_TIME可以在后台获得系统的时间，也是不需要传的；GET_TIME不需要；TOTAL总价是需要传的；NOTE备注也是需要传的。

再看订单详情表：ORDER_DETAIL_ID是自增的，不需要；ORDER_ID也是不需要的；ITEM_ID是需要的；BUY_COUNT也是需要的

1. 提交表单需要传递的数据

补充：再上一篇博客中讲述了如何选择其他地址并渲染到页面上，此时我们在这边的，需要传递ADDRESS_ID, 所以当我们选择其他地址时，同时也是需要将ADDRESS_ID也跟着改变成相应的，不然提交表单时，会传错误的ADDRESS_ID

<input id="formAddressId" name="addressId" type="hidden" th:value="${defaultAddress.addressId}"/>

将需要传递的数据都放入表单中，如果不需要展示，直接设为隐藏就行了

2. 后端接收数据并执行插入操作

我们需要向两个表中插入数据，所以要写两个mapper

UserOrderMapper.java

public interface UserOrderMapper {// 新增订单信息int insertUserOrder(UserOrder userOrder);
}

UserOrderMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""https://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.shopping.mapper.UserOrderMapper"><resultMap id="userOrderBaseResultMap" type="UserOrder"><id column="ORDER_ID" property="orderId"/><result column="USER_ID" property="userId"/><result column="ADDRESS_ID" property="addressId"/><result column="ORDER_TIME" property="orderTime"/><result column="GET_TIME" property="getTime"/><result column="TOTAL" property="total"/><result column="NOTE" property="note"/></resultMap><!--insertUserOrder(UserOrder userOrder);--><insert id="insertUserOrder" parameterType="UserOrder">INSERT INTO userorder (ORDER_ID,USER_ID,ADDRESS_ID,ORDER_TIME,GET_TIME,TOTAL,NOTE)VALUES (#{orderId},#{userId},#{addressId},#{orderTime},#{getTime},#{total},#{note})</insert></mapper>

OrderDetailMapper.java

public interface OrderDetailMapper {//插入订单详情int insertOrderDetail(OrderDetail orderDetail);
}

OrderDetailMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.shopping.mapper.OrderDetailMapper"><resultMap id="baseOrderDetailResultMap" type="Address"><id column="ORDER_DETAIL_ID" property="orderDetailId"/><result column="ORDER_ID" property="orderId"/><result column="ITEM_ID" property="itemId"/><result column="BUY_COUNT" property="buyCount"/></resultMap><!--insertOrderDetail(OrderDetail orderDetail);--><insert id="insertOrderDetail" parameterType="OrderDetail">INSERT INTO orderdetail (ORDER_ID,ITEM_ID,BUY_COUNT) VALUES (#{orderId},#{itemId},#{buyCount})</insert>
</mapper>

UserOrderService.java 接口

使其的返回类型时ResultDTO

public interface UserOrderService {// 直接购买确认订单功能ResultDTO<UserOrder> confirmOrder(UserOrder userOrder, OrderDetail orderDetail);
}

UserOrderServiceImpl.java 实现类

public class UserOrderServiceImpl implements UserOrderService {@ResourceUserOrderMapper userOrderMapper;@ResourceOrderDetailMapper orderDetailMapper;@Overridepublic ResultDTO<UserOrder> confirmOrder(UserOrder userOrder, OrderDetail orderDetail) {ResultDTO<UserOrder> userOrderResultDTO = new ResultDTO<>();// 判断用户是否登录if (0!= userOrder.getUserId()) {int orderId = (int)(Math.random() * 1234567890);  // 生成随机的订单编号userOrder.setOrderId(orderId);userOrder.setOrderTime(new Timestamp(System.currentTimeMillis()));  // 将当前系统的时间直接填入int orderSubmit = userOrderMapper.insertUserOrder(userOrder);if (orderSubmit > 0) {// 订单插入成功，才能进行订单详情插入orderDetail.setOrderId(orderId);int orderDetailSubmit = orderDetailMapper.insertOrderDetail(orderDetail);if (orderDetailSubmit > 0) {userOrderResultDTO.setCode(200);userOrderResultDTO.setMsg("下单成功！");userOrderResultDTO.setData(userOrder);} else {userOrderResultDTO.setCode(500);userOrderResultDTO.setMsg("下单失败！");userOrderResultDTO.setData(null);}}} else {userOrderResultDTO.setCode(500);userOrderResultDTO.setMsg("下单失败！");userOrderResultDTO.setData(null);}return userOrderResultDTO;}
}

UserOrderController.java

    @RequestMapping("/confirmOrder")@ResponseBody// http://localhost:8082/project/order/confirmOrderpublic ResultDTO confirmOrder(UserOrder userOrder, OrderDetail orderDetail) throws Exception {// System.out.println("userOrder:" + userOrder);// System.out.println("orderDetail:" + orderDetail);ResultDTO<UserOrder> confirmOrderResult =  userOrderService.confirmOrder(userOrder, orderDetail);return  confirmOrderResult;}