Mybatis入门

1.定义核心配置文件的路径

2.读取配置文件

3.创建SqlSessionFactory工厂

4.创建SqlSession

5.创建接口的代理对象

6.执行方法

7.释放资源

//1.定义核心配置文件的路径
String resource = "mybatis/mybatis-config.xml";
//2.通过工具API读取资源文件
InputStream inputStream = Resources.getResourceAsStream(resource);
//3.构建SqlSessionFactory
SqlSessionFactory sqlSessionFactory =
            new SqlSessionFactoryBuilder().build(inputStream);
//4.获取SqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
//5.获取Mapper的接口对象
UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
//6.调用接口方法 获取返回值数据
List<User> userList = userMapper.findAll();
System.out.println(userList);
//7.连接用完记得关闭
sqlSession.close();
inputStream.close();