摘要：
一、定义 命令模式是一个高内聚的模式，其定义为：Encapsulate a request as an object,there by letting you parameterize clients with different requests,queue or log requests,and 阅读全文
摘要：
一、定义 中介者模式的定义为：Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to 阅读全文