文章目录

• SqlSession工厂构建器SqlSessionFactoryBuilder
• SqlSession工厂对象SqlSessionFactory
• SqlSession会话对象

SqlSession工厂构建器SqlSessionFactoryBuilder

• 常用API：SqlSessionFactory build（InputStream inputStram）
• 通过加载mybatis的核心文件的输入流的形式构建一个SqlSessionFactory对象

InputStream resourceAsStream = Resources.getResourceAsStream("SqlMapConfig.xml");
//获取工厂对象
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);

SqlSession工厂对象SqlSessionFactory

• SqlSessionFactory 有多个个方法创建 SqlSession 实例。常用的有如下两个：
  

//获取session回话对象
SqlSession sqlSession = sqlSessionFactory.openSession(true);

SqlSession会话对象

• T selectOne(String statement, Object parameter)

User user = sqlSession.selectOne("userMapper.findById", 10);

• List selectList(String statement, Object parameter)

List<User> userList = sqlSession.selectList("userMapper.findAll");

• int insert(String statement, Object parameter)

sqlSession.insert("userMapper.save",user);

• int update(String statement, Object parameter)

sqlSession.update("userMapper.update",user);

• int delete(String statement, Object parameter)

sqlSession.delete("userMapper.delete",7);

• void commit()
• void rollback()

sqlSession.commit();