mybatis 缓存

@Test
    // 测试自动映射
    public void testAutoMapping() throws IOException {
        // 2.获取sqlSession
        SqlSession sqlSession = sqlSessionFactory.openSession();
        // 3.获取对应mapper
        TUserMapper mapper = sqlSession.getMapper(TUserMapper.class);
        // 4.执行查询语句并返回结果
        TUser user = mapper.selectByPrimaryKey(1);
        TUser user2 = mapper.selectByPrimaryKey(1);
        TUser user3 = mapper.selectByPrimaryKey(1);
        TUser user4 = mapper.selectByPrimaryKey(1);
        System.out.println(user == user4);
    }

2020-10-22 19:45:46.216 [main] DEBUG c.e.mybatis.mapper.TUserMapper.selectByPrimaryKey - <== Total: 1
true