创建 OrderService.java

src/main/java/com/gao/finalhw/service/OrderService.java

@@ -0,0 +1,53 @@
+package com.gao.finalhw.service;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
+import com.gao.finalhw.mapper.OrdersMapper;
+import com.gao.finalhw.model.Orders;
+import lombok.Setter;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class OrderService {
+    @Autowired
+    OrdersMapper ordersMapper;
+
+    public Orders getOrderInfo(int orderId) {
+        Orders orderInfo = ordersMapper.selectById(orderId);
+        return orderInfo;
+    }
+
+    public Orders getOrderInfoByUserId(int userId) {
+        QueryWrapper<Orders> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("user_id", userId);
+
+        return ordersMapper.selectOne(queryWrapper);
+    }
+
+    public boolean addOrder(Orders orders) {
+        int result = ordersMapper.insert(orders);
+        return result > 0;
+    }
+
+    public boolean updateOrder(Orders orders) {
+
+        UpdateWrapper<Orders> updateWrapper = new UpdateWrapper<>();
+        updateWrapper.eq("user_id", orders.getUserId());
+
+        return ordersMapper.update(orders, updateWrapper) > 0;
+    }
+
+    public boolean deleteById(Orders orders) {
+        QueryWrapper<Orders> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("id", orders.getOrderId());
+        return ordersMapper.delete(queryWrapper) > 0;
+    }
+
+    public boolean deleteByUserId(Orders orders) {
+        QueryWrapper<Orders> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("user_id", orders.getUserId());
+        return ordersMapper.delete(queryWrapper) > 0;
+    }
+
+}