hibernate中的inverse和mappedBy

最新推荐文章于 2025-07-28 23:27:29 发布

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#inverse #mappedby #hibernate

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本文解释了在Hibernate中inverse和mappedBy的区别与联系。inverse属性用于XML配置中定义关系维护的所有权，而mappedBy则是在注解中使用，两者都用于指定外键的位置。在一个一对一的关系中，mappedBy指明了外键存储在哪一方。

inverse和mappedBy是同一个东西，只是inverse是用于xml配置，而mappedBy则是用于注解中。

Yes, mapped by in annotations performs the same function as inverse would in XML file.

A relationship always have 2 entities participating in it.

In case of one-one or one-many or many to one, the key will be stored in one of the entites. It does not make any sense to store it in 2 places.

It essential tells hibernate that the key is at the other end of the relationship.

So if there are entities A and B which have a one to one relationship, and you see the mappedBy attribute in A, then the foreign key (which points to A) is stored in B.