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Although the above code can meet the requirements, it is not easy to expand and difficult to read. If I want one or two conditions in the future, if I want to recharge 300 yuan successfully, I can win the 150 yuan red envelope, then I have to change the code inside at this time, so the coupling between business logic and code is relatively high, and I accidentally correct the wrong code. At this time, we try to use the responsibility chain mode to transfer objects in turn to realize it.* * This is a self-entertaining post * *《小姐不熙娣》是一档以女性做为出发点，讨论内容聚焦女性职场与生活感受的节目。? Starting from this section, we introduce in detail the concepts and application scenarios of 23 design patterns in Java, and analyze them in combination with their characteristics and the principles of design patterns.Introduction to DDOS (1): Introduction to DDOS《鬼入侵》是雪莉·杰克逊同名经典小说的现代改编版，讲述了在美国最有名的鬼屋中长大的五个兄弟姐妹的故事。成年后，他们因为最小的妹妹的自杀而重新聚到一起，迫使他们最终面对与自身过往有关的鬼魂，一些潜伏在他们的心中，还有一些潜伏在这幢著名的山之屋（Hill House）的阴暗处。影片主要讲述了搏击天才肖飞为筹集母亲医药费而打黑拳，从此走上了混混之路，后来在奥城拳王段平的鼓励下重新走上正轨，逐渐成为一名拳王的励志故事。