各种仓储模式的学习

1. 仓储类和仓储接口 

https://www.cnblogs.com/caofangsheng/p/5801926.html

2. 泛型仓储类和 工作单元 

https://www.cnblogs.com/caofangsheng/p/5804057.html

3. 简单的泛型仓储接口和泛型仓储类

https://www.jianshu.com/p/89b51753b2cf