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However, for large-scale project development or framework design, it is obviously better to organize code with design patterns.The code for creating the object is encapsulated and the specific factory class is instantiated, thus achieving the purpose of encapsulation and instantiation. Encapsulating the code that creates the object in one place can also achieve the purpose of reuse and is more convenient for later maintenance. This also means that when the customer instantiates the object, he will only rely on the interface and not on the specific implementation. Help us to better achieve interface programming rather than implementation, making the code more flexible to cope with future extensions.The advantages of the responsibility chain model are:在这个时代有名，或许是因为烽火戏诸侯。讲述一对父母带着刚出生不久的儿子搬到一个偏远的农舍,这座房子拥有黑暗悲惨的历史。随着他们新家的过去被揭露,母亲的脆弱升级到一种精神错乱的状态,危及她自己和婴儿的安全。语言不通，再深聊也没法聊了，填饱了肚子后杨长帆便告退，跟他们一起过夜还是算了，风险太大。