fix: 优化

src/main/java/com/yupi/project/service/OrderService.java

@@ -1,11 +1,14 @@
 package com.yupi.project.service;
 
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.yupi.project.mapper.OrderMapper;
 import com.yupi.project.model.entity.OrderDO;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.util.List;
+
 /**
  * @author Administrator
  */
@@ -14,19 +17,23 @@ public class OrderService {
 
     @Autowired
     private OrderMapper orderMapper;
+    @Autowired
+    private OrderMapper orderMapper1;
 
     @Transactional
     public void add(OrderDO order) {
         // <1.1> 这里先假模假样的读取一下。读取从库
         OrderDO exists = orderMapper.selectById(1);
+        OrderDO exists1 = orderMapper1.selectById(1);
         System.out.println(exists);
+        System.out.println(exists1);
 
         // <1.2> 插入订单
         orderMapper.insert(order);
 
         // <1.3> 这里先假模假样的读取一下。读取主库
-        exists = orderMapper.selectById(1);
+        List<OrderDO> orderDOList = orderMapper.selectList(new LambdaQueryWrapper<OrderDO>().eq(OrderDO::getUserId, 10));
-        System.out.println(exists);
+        System.out.println(orderDOList);
     }
 
     public OrderDO findById(Integer id) {