本一a和本二的区别

Understanding Factory Method Patterns: All Factory Method Patterns are used to create objects. The factory method pattern encapsulates the object creation process by letting subclasses decide what the created object is. The factory method pattern has the following roles:　　故事始于上世纪70年代末，杨三在下放农场期间，为了霸占知青李青，引爆了一场荒谬的“捉奸”事件，将李青的初夜恋人高建军送进了监狱。后来杨三与李青结了婚，返程后住在昆山县城，然而他们一岁的儿子却是高建军（保剑锋饰演）的亲骨肉，正是这种情感隐患的存在，家庭暴力逐渐升级，最终在一次厮打中两个人同归于尽，而事发在场的工厂师傅刘桂兰（凯丽饰演）不慎卷入其中，慌乱之下，畏罪逃跑被通缉，开始了流亡生活……民国四年秋，在袁世凯庇护下的末代皇帝溥仪的皇宫下旨，要景德镇烧制祭红大龙缸祭天。官窑主赵孚生多次烧制而失败。按朝廷制度，赵孚生理当处死。经不住赵孚生再三求饶，督陶官鲁公公同意按他的要求采用旧俗童女祭窑再烧一次。Synflood attack is the most common DDoS attack on the current network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing.This is what we often call the professional model.