定义 Use sharing to support large numbers of fine-grained objects efficiently.（使用共享对象可有效地支持大量的细粒度的对象。） UML 代码实现 public...

定义 Given a language, define a representation for its grammar along with an interpreter that uses the representation to ...

定义 Allow an object to alter its behavior when its internal state changes.The object will appear to change its class.（当一...

定义 Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operati...

定义 Without violating encapsulation,capture and externalize an object's internal state so that the object can be restore...

定义 Provide a unified interface to a set of interfaces in a subsystem.Facade defines a higher-level interface that makes...

定义 Define a one-to-many dependency between objects so that when one object changes state,all its dependents are notifie...

定义 Compose objects into tree structures to represent part-whole hierarchies.Composite lets clients treat individual obj...

定义 Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representat...

定义 Convert the interface of a class into another interface clients expect.Adapter lets classes work together that could...