摘要： 名称： 状态模式（State Pattern）-对象行为模式 问题： The State pattern allows an object to alter its behavior when its internal state changes. The object appears to cha 阅读全文

摘要： 名称： 责任链模式 （Chain of Responsibility Pattern）-对象行为型模式 问题： The Chain of Responsibility pattern establishes a chain within a system, so that a message can 阅读全文