Question

I’ve got a demo from our instructor about how Hibernate works. But I’m completly lost. I can’t find my way trough all the pages: Dao, Eo, Service, Vo, Action and Model.

Can someone please help me?

Answer 1

Explaining the workings of hibernate is way beyond the scope of this site.

I’d recommend to consult the QuickStart Guide, especially the sections about annotation usage in plain hibernate or using JPA with hibernate (depending on which version you are using, hibernate-core or hibernate-entitymanager).

I’d also recommend to read a (current) book about hibernate. There are several questions here regarding hibernate books, here is the most current one I could find: Good books or online resources for learning Hibernate

And here are some hibernate-independent definitions of the objects and patterns you mentioned:

• Data Access Object (DAO)
• Value Object / Data Transfer Object (VO, DTO)
• Service Layer
• Model-View-Controller (for the Model part)

I have never heard of EO, and Action is at least an ambiguous term: it may however mean the controller in MVC.