MyBatis接口代理对象的2种方式

方式1

　　使用MyBatis自带的API生成代理对象   SqlSessionFactoryBuilder、SqlSessionFactory、SqlSession

　　缺点: 接口代理对象需要手动  getMapper()

  <dependency>
    <groupId>org.mybatis</groupId>  
    <artifactId>mybatis</artifactId>  
    <version>3.5.2</version>
  </dependency>

@Configuration
public class ServiceConfig {

    @Bean
    public AccountMapper getMapper() throws IOException {
        InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
        SqlSession sqlSession = sqlSessionFactory.openSession(true);
        AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
        return mapper;
    }
}

方式2

　　批量自动生成dao层代理对象  业务层需要哪个接口代理对象直接DI注入即可    API由spring与Myabatis的融合包提供

<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>2.0.2</version>
</dependency>

@Configuration
@ComponentScan("com.midea.test")
public class ModeConfig {


    @Bean
    public DruidDataSource getDruid(){
        DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
        druidDataSource.setUrl("jdbc:mysql://127.0.0.1:3306/db1?serverTimezone=GMT%2B8");
        druidDataSource.setUsername("root");
        druidDataSource.setPassword("root");
        return druidDataSource;
    }

    @Bean
    public SqlSessionFactoryBean getSqlSessionFactoryBean(DruidDataSource druidDataSource) throws Exception {

        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        //添加连接池
        sqlSessionFactoryBean.setDataSource(druidDataSource);

        //指定接口映射文件mapper位置
        ResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver();
        sqlSessionFactoryBean.setMapperLocations(resourceResolver.getResources("mapper/*.xml"));

        //开启驼峰自动转换
        sqlSessionFactoryBean.getObject().getConfiguration().setMapUnderscoreToCamelCase(true);
        return sqlSessionFactoryBean;
    }

    @Bean
    public MapperScannerConfigurer m2(){
        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
        mapperScannerConfigurer.setBasePackage("com.midea.mybatis");
        return mapperScannerConfigurer;
    }
}