05 2019 档案
摘要：The Abstract Factory Design Pattern provides a way to encapsulate a group of individual factories that have a common theme without specifying their co
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摘要：The Observer design pattern defines a one-to-many dependency between objects so that when one object changes states, all its dependents are notified a
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摘要：The Prototype design pattern specifies the kind of objects to create using a prototypical instance, and create new objects by copying this prototype.
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摘要：The Factory Method design pattern defines an interface for creating an object , but let subclasses decide which class to instantiate. This pattern let
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摘要：代理模式(proxy):为其他对象提供一种代理以控制对这个对象的访问。在某些情况下，一个对象不适合或者不能直接引用另外一个对象，而代理对象可以在客户端和目标对象之间起到中介的作用。 The Proxy design pattern provides a surrogate or placeholde
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摘要：1、单一职责原则（Single Responsibility Principle SRP）:就一个类而言，应该仅有一个引起它变化的原因。 如果一个类承担的职责过多，就等于把这些职责耦合在一起，一个职责的变化可能会削弱后者抑制这个类完成其他职责的能力。这种耦合会导致脆弱的设计，当变化发生时，设计会遭到
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