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Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.两汉子都很不解：这和尚有啥趣？推磨就更没趣了。民国初年，河北保定府。段祺瑞爱将阎旅长染病高烧，夜间又遇刺受惊，狂躁暴怒。当地名医给阎治病，因不敢担保治愈，当场被杀。阎命副官黄岳将全城大夫抓来，治不好一律枪毙。医者纷纷逃命，被抓者均遭毒手。林聪冷冷地道：你再多话，就不要吃了。所以即便是我们从实际上不能给魏军什么帮助，也要声援他们，现在是拉拢河北诸侯的大好时机。可是写的时候，才发现难度不小，第一次写长篇，没什么经验，对情节的掌控与驾驭能力有限，一路走过来才发现不那么容易。小鱼儿的流.氓行径，让无数男性书友都大呼过瘾。