前言

? ? 我们都知道@Transactional在一些场景下会失效，这些场景我们要记下，哪天报了个bug可能就是事务干的。事务的开始从@Transactional开始，Spring使用AOP面向切面编程，底层用ThreadLocal保证在同一个事务中。下面用SpringBoot+MyBatis-plus结构讲解：

被测试类protected方法：

@Service
public class SecKillServiceImpl extends ServiceImpl<SecKillMapper, SecKill> implements SecKillService {

    @Autowired
    private SignLogService signLogService;


    @Transactional(rollbackFor = Exception.class)
    protected void insert() {
        insertLog();
        addKill();
    }

    private void insertLog() {
        signLogService.addSign();
    }

    private void addKill() {
        SecKill secKill = new SecKill();
        secKill.setUserId(1314L);
        //baseMapper.insert(secKill);
        int i = 10/0; // 模拟异常
    }
}

    @Override
    public void addSign() {
        SignLog signLog = new SignLog();
        signLog.setId("1314520");
        signLog.setCrtTime(LocalDate.now());
        signLog.setPoint(11314520);
        signLog.setSignId("sign");
        signLog.setType(1);
        signLog.setUserId("admin");
        baseMapper.insert(signLog);
    }

测试类：

@RunWith(SpringRunner.class)
@SpringBootTest
public class SecKillServiceImplTest {

    @Autowired
    private SignLogService signLogService;
    @Autowired
    private SecKillServiceImpl secKillServiceImpl;

    @Test
    public void dod() {
        System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>"+signLogService.list());
    }

    @Test
    public void add() {
        secKillServiceImpl.insert();
    }
}

测试结果：

抛异常数据库记录没有回滚：

被测试类public方法：

@Service
public class SecKillServiceImpl extends ServiceImpl<SecKillMapper, SecKill> implements SecKillService {

    @Autowired
    private SignLogService signLogService;


    @Transactional(rollbackFor = Exception.class)
    public void insert() {
        insertLog();
        addKill();
    }

    private void insertLog() {
        signLogService.addSign();
    }

    private void addKill() {
        SecKill secKill = new SecKill();
        secKill.setUserId(1314L);
        //baseMapper.insert(secKill);
        int i = 10/0; // 模拟异常
    }
}

测试类同上

测试结果：