为什么要用抽象工厂模式

https://blog.csdn.net/xingyyn78/article/details/79125343?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.showsourcetag&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.showsourcetag

原文地址:https://www.cnblogs.com/eryun/p/15726407.html