Mybatis在插入自增字段时，会对当前对象未赋值的自增字段进行赋值

Z时代
2024-01-10
分类：综合

            OrderItem orderItem = new OrderItem();
            System.out.println("==========");
            System.out.println(orderItem);//此时输出OrderItem{id=null, pid=null, oid=null, uid=null, number=null, product=null}
            orderItem.setPid(pid);
            orderItem.setUid(user.getId());
            orderItem.setNumber(num);
            System.out.println("==========");
            System.out.println(orderItem);//此时输出OrderItem{id=null, pid=91, oid=null, uid=1, number=1, product=null}
            orderItemService.add(orderItem);
            System.out.println("==========");            System.out.println(orderItem);//此时输出OrderItem{id=6, pid=91, oid=null, uid=1, number=1, product=null}