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In real life, China's income tax is divided into enterprise income tax, foreign-invested enterprises or foreign-invested enterprises income tax and personal income tax. For these three types of income tax, each is calculated in a different way. Personal income tax has a personal income tax calculation method, while enterprise income tax has its corresponding calculation method. If we do not adopt the policy mode to realize such a requirement, we will define an income tax class, which has an attribute to identify the type of income tax and a CalculateTax () method to calculate the tax. In this method, we need to judge the tax type and calculate the income tax for different tax types through if-else statements. Such an implementation can indeed solve this scenario, but such a design is not conducive to expansion. If the system needs to add an income tax in the later period, it has to go back and modify the CalculateTax method to add an additional judgment statement, which clearly violates the principle of "open-closed". At this time, we can consider using the strategic mode to solve this problem. Since the tax method is the changing part of this scenario, we can naturally think of abstracting the tax method at this time, which is also the essence of the implementation of the strategic mode.What is then implemented isInitiation Dispatcher: This is actually the Reactor role. It defines some specifications, which are used to control the scheduling mode of events, and at the same time provide facilities for applications to register and delete event handlers. It itself is the core of the entire event handler, and Initiation Dispatcher waits for events to occur through Synchronous Event Demultiplexer. Once an event occurs, the Initiation Dispatcher first separates each event, then calls the event handler, and finally calls the relevant callback method to handle these events. Each callback method in Netty's ChannelHandler is called by an EventLoop in BossGroup or WorkGroup.尹旭的举动在一瞬间便将彼此的距离拉近了许多。香儿拜见已毕，秦旷怕众女再问，就赶紧说起边关将士进京的事。该剧由东方佳视（北京）文化传媒有限公司出品，李伯勋执导。讲述了动荡不安的民国时期，因发生一起警方无法解决的连环杀人案，迫不得已下召集了破案神探隆泷、神偷钱空、百变卧底蓝若心三人协助破案，三个天才人物明争暗斗各自为营，但在同患难后渐渐成为配合默契的搭档，当三人为自己侦破的谜题沾沾自喜时，更大的危机正在悄然而至。冯子材亲自勘察地形，修建关前隘，率领人马伏击尼格里的炮弹运输船，不料落入尼格里的陷阱，损失惨重。依南也遭法军生擒，所幸法军驻地的越南女子阮月偷偷放走了她，还给她指引了去找黑旗军将领刘永福的道路。被激怒的尼格里，不等炮弹和援军到来，就对关前隘发动了全面攻击，冯子材持刀率先杀敌，全军振奋，猛烈出击，与法军进行一场惨烈的白刃格斗……