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2007年的夏天，北京奥林匹克运动会正式进入一周年倒计时，树德教职工家属院也终于迎来了全院的搬迁，与那排奏鸣着回忆和锅碗瓢盆交响曲的筒子楼说了再见后，带着全新的寄翼，投入进崭新而又陌生的单元小楼的抱怀里。 而发生在黄橙子、谈宋、祝今宵、陈最、贺今朝身上那一系列关乎于成长 、梦想以及暧昧情愫的点点滴滴，也都成为了树德家属院里最最温情的印迹。警长福勒一直因为洛城有个私会党首脑而备受困扰·一日，他找到了三名身怀绝技的高手来协助自己调查，指示他们去当卧底·.....If I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.Let's go on to discuss design patterns. In the previous article, I finished five creative patterns. At the beginning of this chapter, I will talk about the following seven structural patterns: adapter pattern, decoration pattern, agent pattern, appearance pattern, bridging pattern, combination pattern and meta-sharing pattern. The adapter pattern of the object is the origin of various patterns. Let's look at the following figure:琴涵说完之后，不由一声叹息。黄豆大叫：二哥，咱们今儿吃爆炒黄鳝，再来个青椒炒肉丝……黄瓜白了他一眼道：前天不是才吃的黄鳝？哪能回回都依你。20 yuan Face Value Birthday Banknote