Mybatis快速入门

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public class MybatisDemo {
    public static void main(String[] args) throws IOException {
        
//        1.加载mybatis核心配置文件，获取SqlSessionFactory Mybatis官方网站有
        String resource = "mybatis-config.xml";//mybatis相对路径
        //获取inputStream通过Resources对象（资源加载类）getResourceAsStream(resource)将字符串传进来 返回一个字节输入流
        InputStream inputStream = Resources.getResourceAsStream(resource);
        //通过SqlSessionFactoryBuilder()对象的build()方法将流传进来返回SqlSessionFactory对象
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

//        2.获取SqlSessionFactory对象 执行sql语句
        SqlSession session = sqlSessionFactory.openSession();

//        3.执行sql语句
          //session.selectOne()
          //session.selectList("test.selectAll");
        List<User> users = session.selectList("MapperDemo.selectAll");
        System.out.println(users);

//        4.释放资源
        session.close();

    }
}