DO、PO、DTO、VO是什么？

转 zjrbiancheng
浅析VO、DTO、DO、PO的概念、区别和用处
https://blog.csdn.net/zjrbiancheng/article/details/6253232

转 zcywell
DAO和DTO的区别
https://blog.csdn.net/zcywell/article/details/7204186