能不能解释以下缩写？

甚么是PO, POJO, VO, BO, DTO，实在不懂，能否指点一下？

谢谢

PO:持久化对象，Persistent Object
POJO:传统的普通Java 对象、无格式普通Java对象，plain ordinary Java object
DTO:数据传送对象
VO:表示层的数据表示
什么是BO，呵呵，一种常见的木马。

谢谢！

DTO是作甚么用的？

VO是甚么的缩写？

看大家的讨论，似乎BO是业务对象？

VO   value object
BO   bussiness object

faint

一直以为VO 是virtual object  未持久化对象

我还猜测VO是view object呢

POJO is Plain Old Java Object
see http://www.martinfowler.com/bliki/POJO.html

VO(Value Object) and DTO are same thing, just one pattern with 2 term.

呵呵，我个人认为ordinary更能体现其特点，当然这也是个仁者见仁，智者见智的问题。

DAO封装有spec吗？还是自己随便写？

Use a Data Access Object to abstract and encapsulate all access to the persistent store. The Data Access Object manages the connection with the data source to obtain and store data.



Client
The Client is an object that requires access to the data source to obtain and store data. The Client can be a Business Object, a Session Fa&ade, or any other helper object that needs access to persistent data.

DataAccessObject
The DataAccessObject is the primary role object of this pattern. The DataAccessObject abstracts the underlying data access implementation for the Client to enable transparent access to the data source. The DataAccessObject implements create (insert), find (load), update (store), and delete operations.