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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.结束了？杨舟声音中带着落寞。尹旭面带微笑，初战告捷是一个良好的开局，让他的心情尤为高兴。5 妈妈新发售苏岸道：为了表明决心，英布还直接杀了项羽的使臣，事情已经很公开了，没有半分挽回的余地了。是有缘故的，听闻越王尹旭和侄女之间似乎有些情意。