摘要：
抽象工厂模式（Abstract Factory Pattern）是一种比较常用的模式，其定义如下：Provide an interface for creating families of related or dependent objects without specifying their c 阅读全文
摘要：
模板方法的定义：Define the skeleton of an algorithm in an operation,deferring some steps to subclasses.TemplateMethod lets subclasses redefine certain steps o 阅读全文