原型模式
原型模式(Prototype pattern )
为什么要使用原型而不使用new操作符?1.创建对象不需初始化过程;2.保存部分原来对象的信息;3.解决子类爆炸问题。
当一个类族的数量不确定时,但是类与类之间有固定的联系,那么使用原型模式是比较好的解决方案。就向上面说的那样,原型创建新对象并不是通过new一个对象然后初始化来达到创建的目的的。我们只通过对已有对象的复制来实现。就像一俩车的外壳模型一样。我们需要各式各样车的外壳,但是这些外壳都是有固定部分改造而成的,车头,车身和车尾,对于不同的车外壳我们只要改造这个现有的模型而已,而不用重新从一个铁皮开始加工,哪怕我们用的材质不同,所以我们可以先开发一辆车的外壳,然后让所有的外壳都从该外壳上改造,这样即减少来开模的数量,还能节省成本。这就是原型的意义减少初始化的步骤,减少子类。
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将想法付诸于实践,借此来影响他人是一个人存在的真正价值