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　　一位魅力睿智的富家公子秦松平，因身世显赫，娱乐集团老板的身份让他身边美女如云，虽然结婚，却从来没有感受到爱情的滋味。求收藏求推荐。Some people made such demands during divorce:There are three testersThe following figure shows the push-in stack:In the above code, we use three functions, order500, order200, orderNormal to handle its own business logic, If the current own function cannot handle things, We pass it to the following function to handle it. By analogy, Until there is a function that can handle him, Otherwise, the responsibility chain mode will leave the chain directly, telling that it cannot be processed and throwing an error prompt. Although the above code can be used as the responsibility chain mode, we can see from the above code that the Order500 function depends on functions such as Order200, so there must be this function, which also violates the open-closed principle in object-oriented. Let's continue to understand writing flexible and detachable responsibility chain nodes.