hibernate中的inverse和mappedBy

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.