Entity bean和Entity类之间的区别？ [英] Difference between Entity bean and Entity class?

问题描述

EJB 2.0 规范中实体bean 之间的区别是什么？实体类在 3.0 规范中？

What are the differences between entity beans which are in the EJB 2.0 specification and entity classes which in the 3.0 specification?

推荐答案

在EJB 2中，实体是一个bean，意味着它必须存在于容器中并且需要进行管理（类似于其他bean，比如有状态，无状态，消息驱动的bean）。

In EJB 2, entity was a bean meaning that it had to live in a container and need to be managed (similar to other beans, say stateful, stateless, message driven beans).

然而在EBJ 3.x中，entity是一个POJO类 - 这意味着它也可以在容器之外生存..普通的java应用程序可以将实体用作任何支持它的提供者的ORM层..

However in EBJ 3.x, entity is a POJO class - meaning that it can live outside container also.. plain java application can make use of entities as ORM layer with any providers supporting it..

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