毕业设计：基于springboot的鞋子商城网站的设计与开发（源码 + 数据库 + 说明文档）

package com.my.shop.controller; import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.ObjectMapper; import com.my.shop.constant.MyPage; import com.my.shop.dto.Item; import com.my.shop.dto.MyMsg; import com.my.shop.dto.OrderInput; import com.my.shop.entity.Cart; import com.my.shop.entity.Goods; import com.my.shop.entity.Order; import com.my.shop.entity.OrderItem; import com.my.shop.service.*; import io.swagger.annotations.Api; import io.swagger.v3.oas.annotations.Operation; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.transaction.annotation.Transactional; import org.springframework.web.bind.annotation.*; import javax.servlet.http.HttpServletRequest; import javax.validation.Valid; import java.math.BigDecimal; import java.util.ArrayList; import java.util.List; /** * <p> * 订单 前端控制器 * </p> * * @author yl * @since 2021-03-10 */ @RestController @RequestMapping("/user/order") @Api(tags = "用户订单") public class OrderController { @Autowired private IOrderService orderService; @Autowired private IOrderItemService orderItemService; @Autowired private IGoodsService goodsService; @Autowired private IUserService userService; @Autowired private ICartService cartService; @RequestMapping(method = RequestMethod.POST, path = "/") @Operation(summary = "新增") @Transactional public MyMsg save(@RequestBody @Valid OrderInput orderInput, HttpServletRequest request) throws JsonProcessingException { // HttpSession session = request.getSession(); // User user = (User) session.getAttribute(User.USER_SESSION_NAME); /*加订单*/ Order order = new Order(); order.setUserId(orderInput.getUserId()); order.setAddress(orderInput.getAddress()); order.setTotal(BigDecimal.ZERO); orderService.save(order); ArrayList<OrderItem> items = new ArrayList<>(); BigDecimal total = BigDecimal.ZERO; for (Item item : orderInput.getItems()) { Goods goods = goodsService.getById(item.getGoodsId()); if (goods == null) { throw new RuntimeException("商品不存在"); } if (goods.getInventory() < item.getSum()) { throw new RuntimeException("商品库存不足"); } /*加列表*/ OrderItem orderItem = new OrderItem(); orderItem.setAttr(item.getAttr()); orderItem.setGoodsId(item.getGoodsId()); orderItem.setOrderId(order.getId()); orderItem.setSum(item.getSum()); ObjectMapper objectMapper = new ObjectMapper(); String goodsString = objectMapper.writeValueAsString(goods); orderItem.setGoods(goodsString); items.add(orderItem); /*算总价*/ BigDecimal sum = goods.getPrice().multiply(new BigDecimal(item.getSum())); total = total.add(sum); /*减库存*/ goods.setInventory(goods.getInventory() - item.getSum()); goodsService.saveOrUpdate(goods); } orderItemService.saveBatch(items); order.setTotal(total); orderService.saveOrUpdate(order); QueryWrapper<OrderItem> orderItemQueryWrapper = new QueryWrapper<>(); orderItemQueryWrapper.eq("order_id", order.getId()); List<OrderItem> orderItemList = orderItemService.list(orderItemQueryWrapper); order.setItems(orderItemList); //删除购物车 QueryWrapper<Cart> cartQueryWrapper = new QueryWrapper<>(); cartQueryWrapper.eq("user_id", orderInput.getUserId()); cartService.remove(cartQueryWrapper); return new MyMsg(MyMsg.SUCCESS, "成功", order); } @RequestMapping(method = RequestMethod.GET, path = "/list") @Operation(summary = "列表") public MyMsg list(@RequestParam Long userId, @RequestParam(required = false, defaultValue = "1") Integer page, HttpServletRequest request) { // HttpSession session = request.getSession(); // User user = (User) session.getAttribute(User.USER_SESSION_NAME); Page<Order> page1 = new Page<>(page, MyPage.PAGE_NUM); QueryWrapper<Order> orderQueryWrapper = new QueryWrapper<>(); orderQueryWrapper.eq("user_id", userId); Page<Order> page2 = orderService.page(page1, orderQueryWrapper); for (Order order : page2.getRecords()) { QueryWrapper<OrderItem> orderItemQueryWrapper = new QueryWrapper<>(); orderItemQueryWrapper.eq("order_id", order.getId()); List<OrderItem> orderItemList = orderItemService.list(orderItemQueryWrapper); order.setItems(orderItemList); } return new MyMsg(MyMsg.SUCCESS, "成功", page2); } }