@Autowired mapper后,连续调用两次mapper,都会打印sql,不走一级缓存:
需要靠注入SqlSessionFacory,
SqlSession sqlSession=sqlSessionFactory.openSession();
//生成代理类
OrdersMapperCustom orderMapper=sqlSession.getMapper(OrdersMapperCustom.class);
//只要保证是同一个Sqlsession,那么就可以走一级缓存