https://github.com/MaHanZhen/demo/tree/master/transactionNoWork

数据库引擎不支持

如MYSQL的MyIsam就不支持事务操作

场景1 @Transactional标记在了非接口实现的方法上

@Resource
private INoWorkingService noWorkingService;

@Test
void noWorkModel1(){
     noWorkingService.noWorkModel1();
}

 @Override
    public void noWorkModel1() {
        noWorkModel1_1();
    }

    @Transactional
    public void noWorkModel1_1(){
        User user = new User();
        user.setName("noWorkModel1_1");
        user.setAge(777);
        userDao.save(user);
        int q = 1/0;
    }

由于业务开发中通常使用接口作为调用对象，如果注解标记在了接口方法调用的方法中，则事务无效

场景2 @Transactional标记在了非public的方法上

 @Transactional
void noWorkModel2_2() {
        User user = new User();
        user.setName("noWorkModel2_2");
        user.setAge(777);
        userDao.save(user);
        int q = 1/0;
}

场景3 发生的异常已捕获

@Transactional
    @Override
    public void noWorkModel3() {
        User user = new User();
        user.setName("noWorkModel3");
        user.setAge(777);
        userDao.save(user);
        try {
            int q = 1/0;
        }catch (Exception e){
            e.printStackTrace();
        }
    }

场景4 A调用B，B开启事务，A没有，A发生异常则B成功提交

@Override
    public void noWorkModel4_1() {
        noWorkModel4_2();
        int q = 1/0;
    }

    @Override
    @Transactional
    public void noWorkModel4_2() {
        User user = new User();
        user.setName("noWorkModel4_2");
        user.setAge(777);
        userDao.save(user);
    }