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Woboni Sharing Test Method　　故事梗概：20岁的废柴大学生——木之下和也。和初恋女友仅接吻了一次，可只过了一个月就被甩了。Cyclic-l 0x6261616b140将来一统天下之后或许可以，越王或许还会乐见其成。毕竟是野作坊，在生产中还少了关键的一环——储存。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.