public static void main(String[] args) throws IOException {//mybatis的配置文件String resource = "conf.xml";//使用类加载器加载mybatis的配置文件（它也加载关联的映射文件）InputStream is = Test1.class.getClassLoader().getResourceAsStream(resource);//构建sqlSession的工厂SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(is);//使用MyBatis提供的Resources类加载mybatis的配置文件（它也加载关联的映射文件）//Reader reader = Resources.getResourceAsReader(resource); //构建sqlSession的工厂//SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);//创建能执行映射文件中sql的sqlSessionSqlSession session = sessionFactory.openSession();/*** 映射sql的标识字符串，* me.gacl.mapping.userMapper是userMapper.xml文件中mapper标签的namespace属性的值，* getUser是select标签的id属性值，通过select标签的id属性值就可以找到要执行的SQL*/String statement = "me.gacl.mapping.userMapper.getUser";//映射sql的标识字符串//执行查询返回一个唯一user对象的sqlUser user = session.selectOne(statement, 1);System.out.println(user);}

   public SqlSessionFactory SqlSessionFactory(){DataSource dataSource ;//数据库连接池，使用第三方即可TransactionFactory transactionFactory = new JdbcTransactionFactory();//事物，使用默认。也可以配合spring，使用spring自带的Environment environment = new Environment("development", transactionFactory, dataSource);//环境配置即 开发或者生产
        Configuration configuration = new Configuration(environment);//配置中心configuration.addMappers("conge.wang.sqlmappers");//加载mappers xml package,及扫描conge.wang.sqlmappers下面的xml配置//configuration.addMapper(TestSqlMapper.class);//或者加载mappers class。不过不推荐使用
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(configuration);//从SqlSessionFactoryBuilder构建return sqlSessionFactory;}