小技巧记录

try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
    // 4. 获取Mapper接口的代理对象
    UserMapper userMapper = sqlSession.getMapper(UserMapper.class);

    // 5. 执行查询
    User user = userMapper.selectUser(1);

    // 6. 输出结果
    System.out.println(user);
}