java - 我是否需要在 Spring 事务中显式保存修改后的域对象？

Question

如果我有如下事务，其中我的域对象使用 Hibernate 映射为 Cascade.ALL:

@Transactional
public void transactionAllMethod(Domain domain) {
     domain.addItemToCollection(new Item);
     //Do I need to call domain.saveOrUpdate() here, or will changes to the domain be flushed
     //automatically at the end of the transaction with FLUSHMODE.AUTO?

     Domain domain2 = new Domain();
     //set some fields here

     //Do I need to save my second domain as it is new, or again will things be
     //automatically persisted during dirtychecking at the end of the transaction?
}

如果我在这两种情况下都不需要显式保存，我应该在哪里进行保存？

Answer 1

您需要合并对现有实体的所有更改，然后保存新实体。

Session session = sessionFactory.getCurrentSession();
session.merge(domain);
session.save(domain2);