Mediator模式（C++中介者模式含个人Demo源码）

来源：互联网发布：清华软件学院位置编辑：程序博客网时间：2024/04/27 16:18

重新温习GOF23到第18个中介者模式了，感觉还是蛮不错的，写了一个小小的Demo来解释下他们之间的关系。

中介者模式其实就相当于：中介，租房人，还有房主三者之间的关系。

房主A，租房人B首先联系了中介，在中介那里记名字了。

房主A有空房了，发条消息给中介，中介将A有空房的消息发给其他人。

在此之上，demo做了小小扩充，当又有租房人C联系中介，B发了条消息，A与C都会收到B的消息。

#include <iostream>#include <vector>using namespace std;#include <crtdbg.h>class Person;class Mediator{public:virtual void SendMsg(string msg, Person *pItem) = 0;};class Person{public:Person(Mediator *pMediator):m_pMediator(pMediator){}virtual void Say(string msg) = 0;virtual void GetMsg(string msg) = 0;protected:Mediator *m_pMediator;};class PersonA : public Person{public:PersonA(Mediator *pMediator):Person(pMediator){}virtual void Say(string msg){cout<<"PersonA said:"<<endl;m_pMediator->SendMsg(msg, this);} void GetMsg(string msg) { cout<<"PersonA GetMsg: "<<msg.c_str()<<endl; }};class PersonB : public Person{public:PersonB(Mediator *pMediator):Person(pMediator){}virtual void Say(string msg){cout<<"PersonB said:"<<endl;m_pMediator->SendMsg(msg, this);}void GetMsg(string msg){cout<<"PersonB GetMsg: "<<msg.c_str()<<endl;}private:};class PersonC : public Person{public:PersonC(Mediator *pMediator):Person(pMediator){}virtual void Say(string msg){cout<<"PersonC said:"<<endl;m_pMediator->SendMsg(msg, this);}void GetMsg(string msg){cout<<"PersonC GetMsg: "<<msg.c_str()<<endl;}private:};class ConcreateMediator : public Mediator{private:vector<Person*> conentList;public:void AddFriend(Person* pPerson)// 没有添加该好友，则添加进去{vector<Person*>::iterator iter = conentList.begin();for (; iter != conentList.end(); iter++){if(*iter == pPerson)break;}if(iter == conentList.end()){conentList.push_back(pPerson);}}void SendMsg(string msg, Person *pItem) //如假设A不认识其他人，A发送信息，通过中介，则可以发送给其他的人{vector<Person*>::iterator iter = conentList.begin();while(iter != conentList.end()){if(*iter != pItem)(*iter)->GetMsg(msg);iter++;}}};void main(){_CrtSetDbgFlag(_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF) | _CRTDBG_LEAK_CHECK_DF);ConcreateMediator *pMediator = new ConcreateMediator();Person *pA = new PersonA(pMediator);Person *pB = new PersonB(pMediator);Person *pC = new PersonC(pMediator);pMediator->AddFriend(pA);pMediator->AddFriend(pB);pA->Say("call JesonYang");pMediator->AddFriend(pC);pB->Say("demo by yc7369");delete pA;delete pB;delete pC;delete pMediator;}

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