Java：为何事务的实际执行结果与预期不符

Question

@Controller
@EnableAutoConfiguration
public class SampleController {


    @Autowired
    private WeiboRepository weiboRepository;

    @Autowired
    private TwitterRepository twitterRepository;

    @RequestMapping("/postWeibo")
    @ResponseBody
    public void postWeibo() {
        Weibo weibo = new Weibo("Weibo");
        weiboRepository.save(weibo);
        postTwitter();
    }

    @Transactional(propagation = Propagation.REQUIRED, rollbackFor = Exception.class)
    public void postTwitter() {
        Twitter twitter = new Twitter("Twitter");
        twitterRepository.save(twitter);
        throw new RuntimeException();
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(SampleController.class, args);
    }

}

代码逻辑：添加一条微博的同时添加一条推特，postTwitter手动抛出异常模拟回滚
预期结果：Twitter表由于抛出异常造成回滚，Weibo表正常添加
实际结果：虽抛出异常但Twitter、Weibo表均正常添加

请问我已经设置了@Transactional，事务级别为REQUIRED表明postTwitter会单独开启新的事务，为何实际执行结果与预期不符合呢？

Answer 1

public void postWeibo() {
        Weibo weibo = new Weibo("Weibo");
        weiboRepository.save(weibo);
        postTwitter();
}

代码中的postTwitter();相当于this.postTwitter();这样调用是不行的。参考https://blog.csdn.net/dapinxiaohuo/article/details/52092447。然后你把

@Transactional(propagation = Propagation.REQUIRED, rollbackFor = Exception.class)
    public void postTwitter() {
        Twitter twitter = new Twitter("Twitter");
        twitterRepository.save(twitter);
        throw new RuntimeException();
    }

方法放到其他的service中，然后本service注入前面说的service，你再试试