基于spring事务简单实例

spring bean

@Configuration
public class SpringBean {

    @Bean("dataSource")
    public DriverManagerDataSource driverManagerDataSource(){
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://127.0.0.1:3306/test");
        dataSource.setUsername("root");
        dataSource.setPassword("123");
        return dataSource;
    }

    @Bean
    public DataSourceTransactionManager dataSourceTransactionManager(DataSource dataSource){
        DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
        dataSourceTransactionManager.setDataSource(dataSource);
        return dataSourceTransactionManager;
    }

    @Bean
    public SqlSessionFactoryBean sqlSessionFactoryBean(DataSource dataSource){
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource);
        Resource[] resources = {
            new ClassPathResource("mapper/hello.xml")
        };
        sqlSessionFactoryBean.setMapperLocations(resources);
        return sqlSessionFactoryBean;
    }

    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer(){
        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
        mapperScannerConfigurer.setBasePackage("com.example.demo.dal");
        mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean");
        return mapperScannerConfigurer;
    }
}

mapper/hello.xml

<mapper namespace="com.example.demo.dal.HelloDao">

    <select id="getName" resultType="java.lang.String" parameterType="java.lang.Integer">
        SELECT name FROM test WHERE id=#{id} for UPDATE;
    select>
mapper>

dal

public interface HelloDao {
    String getName(@Param("id") Integer id);
}

service

@Service
public class HelloService {
    @Autowired
    public HelloDao helloDao;

    @Transactional("dataSourceTransactionManager")
    public String hello(Integer id){
        return helloDao.getName(id);
    }
}