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代理Proxy：Proxy代理模式是一种结构型设计模式，主要解决的问题是：在直接访问对象时带来的问题代理是一种常用的设计模式，其目的就是为其他对象提供一个代理以控制对某个对象的访问。代理类负责为委托类预处理消息，过滤消息并转发消息，以及进行消息被委托类执行后的后续处理。为了保持行为的一致性，代理类和...

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