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Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation. 它提供一种方法访问一个容器对象中各个…

Define a family of algorithms,encapsulate each one,and make them interchangeable. 定义一组算法，将每个算法都封装起来，并且使它们之间可以互换。 每天上完班回到家第一件事情是干啥？有人一进门就躺在沙…

Encapsulate a request as an object,thereby letting you parameterize clients with different requests,queue or log requests,and support undoa…

Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request.Chain the receiving ob…

Define an object that encapsulates how a set of objects interact.Mediator promotes loose coupling by keeping objects from referring to each…

猪年真正到来啦！给自己放了一个长长的假，直到今天上班都还没怎么精神。不知道大家这个年过得怎么样，是不是都回老家了？老家有什么变化么？我来说说我看到的变化，大家也可以畅谈过年的感受。 回到家乡，停滞了八年之久的沿江路终于通车了。现在的老家在往城市化发展，路已经四通八达，不再是当年…

Define the skeleton of an algorithm in an operation,deferring some steps to subclasses. Template Method lets subclasses redefine certain st…

Specify the kinds of objects to create using a prototypical instance,and create new objects by copying this prototype. 用原型实例指定创建对象的种类，并且通过拷…

Separate the construction of a complex object from its representation so that the same construction process can create different representa…