休眠映射最佳实践

Question

I am wondering if there are any special solutions or software design patterns for the following scenario. I have similar attributes for my Hibernate-Mapping-Classes, like isEnabled, isDetelable, dateCreated, lastModified, ... . I don't want to repeat the property definition in each class, instead define them once, and add the property to the classes I want. For example ClassA can have isEnabled and dateCreated, ClassB can have dateCreated and isDeletable, ClassC can have isEnabled, isDetelable, lastModified and so on.

Answer 1

One option is to use the @MappedSuperclass annotation to create a superclass for your entities which contains the fields you want. Another solution is to use an @Embeddable class that contains the fields and use the @Embedded annotation to add them to only specific entities, in which case you don't need to extend a super entity.