摘要：
抽象工厂模式定义：Provide an interface for creating families of related or dependent objects without specifying their concrete classes. (为创建一组相关或互相依赖的对象提供一个接口， 阅读全文
摘要：
工厂方法模式 工厂方法模式定义：Define an interface for creating an object,but let subclasses decide which class to instantiate.Factory Method lets a class defer inst 阅读全文