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一名普通复员军人在偶然间发现保卫几百万人口生命的防洪大堤被一伙不法商人、黑社会、腐败分子做成“豆腐渣”工程后，勇敢地揭发并与这群人斗争到底，最后保住了该市几百万人的生命……《杜鹃山》总制片人严从华介绍，对于此次翻拍要本着尊重经典的原则，经过近八个月的前期筹备，既要丰富人物，又要最大程度忠实于京剧版，改编几易其稿，“京剧与电视剧毕竟是两种不同的载体，电视剧有京剧的‘脸谱化’，更多要从现实生活中塑造，人物要更加丰满，拍摄难度极高。”The policy pattern defines a series of algorithms and encapsulates each algorithm so that they can be replaced with each other, and the changes in the algorithms will not affect the customers who use the algorithms. It is necessary to design an interface to provide a unified method for a series of implementation classes. Multiple implementation classes implement the interface, design an abstract class (optional, belonging to auxiliary class), and provide auxiliary functions. The diagram is as follows:As above, the code uses the policy pattern to refactor the code. It can be seen that the code responsibilities are updated clearly and the code becomes clearer.这才叫玩儿么。你已经很有名了，东海谁不知你徐海？也要记住你的名字。Public class Source implements Sourceable {