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The reason why the logic for creating an object is put into a separate class is that it can be used by multiple clients. And separates the creation and use of objects. However, this design also has many defects. First of all, SimpleFactory is a specific class, so we must program for the implementation, making the system lose its flexibility in this respect. Second, if we add new products, we have to modify the code in SimpleFactory, which violates the opening and closing principle. The above model is also called simple factory. He does not appear in GOF mode, it is more like a programming habit.他低声在玉米耳边说了几句话，又塞给他一样东西，然后将他推进另一个空间。江南巨富高尚，因年少轻狂，得罪当朝天子，万贯家财一朝尽失，成为一介布衣，被迫以卖烧饼重新起家。十八年后，高尚带着相依为命的女儿小晴流落到京城，继续烧饼事业，高尚的心里始终想着赚足白银十万两，一雪前耻……阿军（林雪 饰）和阿郎（吴彦祖 饰）是一对相依为命的兄弟，尽管阿郎长了一张人人避之而不及的畸形面孔，可是在阿军的心里，他依然是那个独一无二的亲弟弟。为了讨生活，阿军和阿郎来到了香港，在那里，他们加入了黑道，成为了职业杀手。一次任务中，阿郎被负责监视目标的警察阿肯（冯德伦 饰）捉住，阿肯被阿郎的丑陋长相所震慑，将其放走了。一时张槐也回来了。郑武心中一阵开心，以后还能继续愉快的看天启的小说。