mybatis0070- 一次简单查询的执行过程

谁借莪１个温暖的怀抱￠ 2022-01-26 20:03 212阅读 0赞

### 文章目录 ###

*   *   *  一次简单查询
         *   *  1. \[解析xml配置文件，生成SqlSessionFactory\](https://blog.csdn.net/wrongyao/article/details/90575448)
             *  2. \[通过SqlSessionFactory创建sqlSession\](https://blog.csdn.net/wrongyao/article/details/90576026)
             *  3. \[Mapper接口到SqlSession的跨越\](https://blog.csdn.net/wrongyao/article/details/90576828)
             *  4. \[SqlSeesion执行sql语句\](https://mp.csdn.net/postedit/101426262)

[githup项目地址][githup]

### 一次简单查询 ###

public class Test { 
        public static void main(String[] args) { 
            try { 
                String resource = "mybatis.xml";
                InputStream inputStream = Resources.getResourceAsStream(resource);
                SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
                SqlSession sqlSession = sqlSessionFactory.openSession();
                SysRoleMapper sysRoleMapper = sqlSession.getMapper(SysRoleMapper.class);
                SysRole sysRole = sysRoleMapper.selectById(1);
                System.out.println(sysRole);
                sqlSession.close();
            } catch (IOException e) { 
                e.printStackTrace();
            } finally { 
            }
        }
    }

上述过程可以分为下面几个步骤

#### 1. [解析xml配置文件，生成SqlSessionFactory][xml_SqlSessionFactory] ####

#### 2. [通过SqlSessionFactory创建sqlSession][SqlSessionFactory_sqlSession] ####

#### 3. [Mapper接口到SqlSession的跨越][Mapper_SqlSession] ####

#### 4. [SqlSeesion执行sql语句][SqlSeesion_sql] ####

[githup]: https://github.com/wenrongyao/mybatis
[xml_SqlSessionFactory]: https://blog.csdn.net/wrongyao/article/details/90575448
[SqlSessionFactory_sqlSession]: https://blog.csdn.net/wrongyao/article/details/90576026
[Mapper_SqlSession]: https://blog.csdn.net/wrongyao/article/details/90576828
[SqlSeesion_sql]: https://mp.csdn.net/postedit/101426262