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Differences between simple factories and factory methods: Simple factories and factory method patterns look very similar, especially specific factories in simple factories and factory methods. Simple factory, all things have been done in one place. However, the factory method creates a framework for subclasses to decide how to implement it. For example, in the factory method, the OrderPizza method creates a general framework to create pizza. The OrderPizza method relies on the factory method to create specific classes and make actual pizza. It is possible to decide what the actual products manufactured are by inheriting the factory. Simple factories do not have this flexibility.On the other hand, although DDoS can erode bandwidth or resources and force service interruption, this is far from the real purpose of hackers. As the saying goes, there is no killing without buying and selling. DDoS is only a nuclear weapon in the hands of hackers. Their purpose is either extortion, commercial competition or political stance. Driven by this kind of black interest, more and more people take part in this industry and improve and upgrade the attack methods, resulting in DDoS becoming more and more fierce in the Internet industry and becoming a persistent disease that cannot be overcome worldwide.1944年日本悍然发动了蓄谋已久的豫湘桂战役，战况已危及陪都重庆和我西南大后方的安全。国军桂林行营，中华国民革命军副总参谋长杜长官召集干将们部署美国特使华莱士来桂林商讨中美联合作战协作方案的安保工作，上校情报官黎明江临危授命负责特使在桂的安全。美丽的桂林，天下之绝景，曾经在抗战的烈火中如何被倭寇变成了人间地狱？战争中的人们又各自演绎着怎样的聚散无常？警界老油条阿辉（周润发 饰）生性风流，凭借自己父亲昔日手下沾叔（黄沾 饰）的维护，阿辉在警局虽然得不到升迁，但也落得清闲。新进警员曹里昂（李元霸 饰）的到来打破了这一切，曹大胆甚至莽撞的办案方式连累阿辉大出洋相，阿辉虽恨曹里昂，但碍于上司命令，不得不与曹搭档。沿海小城，年轻警官杨家栋（井柏然 饰）初来乍到，恰遇城建委主任唐奕杰（张颂文 饰）坠楼身亡。杨家栋遂展开调查，发现唐奕杰坠楼案与和他过从甚密的紫金企业 负责人姜紫成（秦昊 饰），还有几年前紫金企业合伙人阿云（陈妍希 饰）失踪案都有着密切的关系。杨家栋调查中惨遭革职、追杀，一路逃往香港，途中与死者女儿小诺（马思纯 饰）意外邂逅，并在小诺的协助下继续追查，浑然不觉自己正落入一个纯情陷阱……喜欢尹旭吗？转瞬间脸上绯红一片，jiāo羞不已。江君，一个对眼泪重度过敏的女孩，有着经济学与心理学双硕士学位，父母给予的优越而宠溺环境造就了她天性洒脱、理想主义的性格，毕业后的她在一家公益组织工作，追寻着属于自己内心的生活。不料，父亲的意外去世却使她站在了人生的三叉路口，江君最终决定进入顶级投行公司MH完成父亲的遗愿。在MH里，江君意外与童年玩伴袁帅相逢，但高兴不过三秒后，却发现自己童年的保护伞，那个温柔的袁帅哥哥竟然处处与自己为敌，在狼性文化的投行公司里，有人在暗中给她布局设套，有人视她为棋子兼眼中钉，但江君凭借着自己善良而细腻的天性，出众的情商以及天才般的想象力，判断着人和项目复杂的变数，在暴风雨的中心，她开始了自己的征途，经历了一番番风霜雪雨后，最终收获了自己的事业与爱情。