初学MyBatis，有哪些入门技巧分享？

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javapublic class Test { static SqlSessionFactory sqlSessionFactory;

public static void main(String[] args) { SqlSession session1=getSqlSession(); // 通过接口实现，避免硬编码 IUserInfoDao dao=session1.getMapper(IUserInfoDao.class); }}

public class Test { static SqlSessionFactory sqlSessionFactory; public static void main(String[] args) { SqlSession session1 = getSqlSession(); //面向接口，必须这样实现 IUserInfoDao dao = session1.getMapper(IUserInfoDao.class); System.out.println(dao.getUserById(1)); } private static SqlSession getSqlSession() { return sqlSessionFactory.openSession(); } static{ try { String resource = "mybatis.xml"; InputStream inputStream = Resources.getResourceAsStream(resource); sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); } catch (Exception e) { throw new RuntimeException(e); } } } mybatis.xml

UserInfoMapper.xml

select * from userinfo select * from userinfo where id=#{id} select * from userinfo where name=#{a} and pwd=#{pwd} select seq.nextval from dual insert into userinfo values(#{id},#{name},#{pwd},#{rolesid}) 包结构.PNG