意圖：用一個中介對象來封裝一系列的對象交互。中介者使各對象不需要顯式地相互引用，從而使其耦合松散，而且可以獨立地改變它們之間的交互。

一般來說，只有對于那種同事類之間是網狀結構的關系，才會考慮使用中介者模式。可以將網狀結構變為星狀結構，使同事類之間的關系變的清晰一些。

class Mediator { public:Mediator(){}~Mediator(){}virtual void Notify() = 0; };class Colleague { public:Colleague(Mediator* mediator){this->mediator = mediator;}virtual ~Colleague(){}protected:Mediator* mediator; };class ColleagueProvidor: public Colleague { public:ColleagueProvidor(Mediator* mediator): Colleague(mediator){}~ColleagueProvidor(){}void ChangeProvidor(){cout<<"ColleagueProvidor::ChangeProvidor()"<<endl;mediator->Notify();} };class ColleagueConsumer: public Colleague { public:ColleagueConsumer(Mediator* mediator): Colleague(mediator){}~ColleagueConsumer(){}void ChangeConsumer(){cout<<"ColleagueConsumer::ChangeConsumer()"<<endl;} };class ConcreteMediator: public Mediator { public:ConcreteMediator(){}~ConcreteMediator(){}void Introduce(ColleagueProvidor* providor, ColleagueConsumer* consumer){this->providor = providor;this->consumer = consumer;}void Notify(){consumer->ChangeConsumer();}private:ColleagueProvidor* providor;ColleagueConsumer* consumer; };

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轉載于:https://www.cnblogs.com/lianghuiwen/archive/2013/05/05/3061906.html

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