Spring事务简介

• 事务作用：在数据层保障一系列的数据库操作同成功同失败
• Spring事务作用：在数据层或业务层保障一系列的数据库操作同成功同失败

public interface PlatformTransactionManager{
    void commit(TransactionStatus status) throws TransactionException;
    void rollback(TransactionStatus status) throws TransactionException;
}

public class DataSourceTransactionManager {
    ...
}

public interface Accountservice {
    public void transfer(string out, string in, double money);
}

@Service
public class AccountServiceImpl implements AccountService {
    @Autowired
    private AccountDao accountDao;

    public void transfer(String out, String in, Double money) {
        accountDao.outMoney(out, money);
        int i = 1/0;   // 出现异常，异常之前的数据操作成功，之后的失败
        accountDao.outMoney(in, money);
    }
}

public interface AccountDao {
    @Update("update tbl_account set money = money + #{money} where name = #{name}")
    void inMoney(@Param("name") String name, @Param("money") Double money);

    @Update("update tbl_account set money = money - #{money} where name = #{name}")
    void outMoney(@Param("name") String name, @Param("money") Double money);
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfig.class)
public class AccountServiceTest {
    @Autowired
    private AccountService accountService;

    @Test
    public void testTransfer() throws IOException {
        accountService.transfer("Tom", "Jerry", 100D);
    }
}

使用事务管理

public interface Accountservice {
    @Transactional
    public void transfer(string out, string in, double money);
}

// JdbcConifg.class
    @Bean
    public PlatformTransactionManager transactionManager(DataSource dataSource) {
        DataSourceTransactionManager transactionManager = new DataSourceTransactionManager();
        transactionManager.setDataSource(dataSource);
        return transactionManager;
}

@Configuration
@ComponentScan( "com.xxx")
@PropertySource("classpath:jdbc.properties")
@Import({JdbcConfig.class, MybatisConfig.class})
@EnableTransactionManagement
public class SpringConfig {}

}