Spring + JPA @Transactional没有提交

@Service
public class MyService {

    @Autowired
    private JpaRepository jpaRepository;

    @Transactional
    public void saveWithTransaction() {
        // ...
        jpaRepository.save(entity);
        // ...
        TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronizationAdapter() {
            @Override
            public void afterCommit(boolean successful, Object state) {
                // 在事务提交完成后调用，例如发送邮件通知等
            }
        });
    }
}