add Mediator Pattern

18.MediatorPattern/2.Code/Colleague.h

@@ -0,0 +1,62 @@
+#ifndef __COLLEAGUE_H__
+#define __COLLEAGUE_H__
+
+#include "common.h"
+using namespace std;
+
+// 前向声明
+class Mediator;
+class Agency;
+
+// 抽象同事类
+class Colleague
+{
+public:
+	Colleague(){}
+	void setMediator(Mediator* iMediator){
+		this->mediator = iMediator;
+	}
+	Mediator* getMediator(){
+		return this->mediator;
+	}
+	void setPersonType(PERSON_TYPE iPersonType){
+		this->personType = iPersonType;
+	}
+	PERSON_TYPE getPersonType(){
+		return this->personType;
+	}
+	virtual void ask() = 0;
+	virtual void answer() = 0;
+private:
+	PERSON_TYPE personType;
+	Mediator* mediator;
+};
+
+// 具体同事类：房东
+class Landlord :public Colleague
+{
+public:
+	Landlord();
+	Landlord(string iName, int iPrice, string iAddress, string iPhoneNum);
+	void ask();
+	void answer();
+private:
+	string name;
+	int price;
+	string address;
+	string phoneNumber;
+};
+
+// 具体同事类：租客
+class Tenant :public Colleague
+{
+public:
+	Tenant();
+	Tenant(string name);
+	void ask();
+	void answer();
+private:
+	string name;
+};
+
+#endif //__COLLEAGUE_H__

18.MediatorPattern/2.Code/Landlord.cpp

@@ -0,0 +1,29 @@
+#include "Colleague.h"
+#include "Mediator.h"
+
+Landlord::Landlord(){
+	name = "none";
+	price = 0;
+	address = "none";
+	phoneNumber = "none";
+	setPersonType(NONE_PERSON);
+}
+
+Landlord::Landlord(string iName, int iPrice, 
+	string iAddress, string iPhoneNum){
+	name = iName;
+	price = iPrice;
+	address = iAddress;
+	phoneNumber = iPhoneNum;
+	setPersonType(LANDLORD);
+}
+
+void Landlord::answer(){
+	printf("房东姓名：%s, 房租：%d, 地址：%s, 联系电话：%s\n",
+		name.c_str(), price, address.c_str(), phoneNumber.c_str());
+}
+
+void Landlord::ask(){
+	printf("房东%s查看租客信息：\n",name.c_str());
+	(this->getMediator())->operation(this);
+}

18.MediatorPattern/2.Code/Mediator.h

@@ -0,0 +1,57 @@
+#ifndef __MEDIATOR_PATTERN_H__
+#define __MEDIATOR_PATTERN_H__
+
+#include "common.h"
+#include "Colleague.h"
+
+// 抽象中介者
+class Mediator
+{
+public:
+	Mediator(){}
+	// 声明抽象方法
+	virtual void operation(Colleague*) = 0;
+	// 声明注册方法
+	virtual void registerMethod(Colleague*) = 0;
+};
+
+// 具体中介者
+class Agency:public Mediator
+{
+public:
+	Agency(){}
+	void registerMethod(Colleague* person){
+		switch (person->getPersonType()){
+		case LANDLORD:
+			landlordList.push_back((Landlord*)person);
+			break;
+		case TENANT:
+			tenantList.push_back((Tenant*)person);
+			break;
+		default:
+			printf("wrong person\n");
+		}
+	}
+	void operation(Colleague* person){
+		switch (person->getPersonType()){
+		case LANDLORD:
+			for (int i = 0; i < tenantList.size(); i++){
+				tenantList[i]->answer();
+			}
+			break;
+		case TENANT:
+			for (int i = 0; i < landlordList.size(); i++){
+				landlordList[i]->answer();
+			}
+			break;
+		default:
+			break;
+		}
+	}
+private:
+	vector<Landlord*>landlordList;
+	vector<Tenant*>tenantList;
+};
+
+
+#endif //__MEDIATOR_PATTERN_H__

18.MediatorPattern/2.Code/Tenant.cpp

@@ -0,0 +1,21 @@
+#include "Colleague.h"
+#include "Mediator.h"
+
+Tenant::Tenant(){
+	name = "none";
+	setPersonType(NONE_PERSON);
+}
+
+Tenant::Tenant(string iName){
+	name = iName;
+	setPersonType(TENANT);
+}
+
+void Tenant::ask(){
+	printf("租客%s询问房东信息\n", name.c_str()); 
+	(this->getMediator())->operation(this);
+}
+
+void Tenant::answer(){
+	printf("租客姓名：%s\n", name.c_str());
+}

18.MediatorPattern/2.Code/common.h

@@ -0,0 +1,16 @@
+#ifndef __COMMON_H__
+#define __COMMON_H__
+
+// 公共头文件
+
+#include <vector>
+using namespace std;
+
+enum PERSON_TYPE
+{
+	NONE_PERSON,
+	LANDLORD,
+	TENANT
+};
+
+#endif  //__COMMON_H__

18.MediatorPattern/2.Code/main.cpp

@@ -0,0 +1,38 @@
+#include <iostream>
+#include "Mediator.h"
+#include "Colleague.h"
+
+int main()
+{
+	// 创建租房中介
+	Agency *mediator = new Agency();
+
+	// 创建3位房东
+	Landlord *fangdong1 = new Landlord("刘备", 1350, "成都市双流区", "1351025");
+	Landlord *fangdong2 = new Landlord("关羽", 1500, "成都市武侯区", "1378390");
+	Landlord *fangdong3 = new Landlord("张飞", 1000, "成都市龙泉驿", "1881166");
+	fangdong1->setMediator(mediator);
+	fangdong2->setMediator(mediator);
+	fangdong3->setMediator(mediator);
+	// 房东在中介处登记注册房源信息
+	mediator->registerMethod(fangdong1);
+	mediator->registerMethod(fangdong2);
+	mediator->registerMethod(fangdong3);
+
+	// 创建两位租客Jungle和贱萌兔
+	Tenant *jungle = new Tenant("Jungle");
+	Tenant *jianmengtu = new Tenant("贱萌兔");
+	jungle->setMediator(mediator);
+	jianmengtu->setMediator(mediator);
+	// Jungle和贱萌兔在中介处登记求租信息
+	mediator->registerMethod(jungle);
+	mediator->registerMethod(jianmengtu);
+
+	jungle->ask();
+	printf("\n\n");
+	fangdong1->ask();
+
+	printf("\n\n");
+	system("pause");
+	return 0;
+}

README.md

@@ -81,4 +81,8 @@ Jungle设计模式系列
 
 20.设计模式（二十）——迭代器模式
 
-博客地址：https://blog.csdn.net/sinat_21107433/article/details/102879383
+博客地址：https://blog.csdn.net/sinat_21107433/article/details/102879383
+
+21.设计模式（二十一）——中介者模式
+
+博客地址：https://blog.csdn.net/sinat_21107433/article/details/102885567