大话设计模式（13）——职责链模式（Chain of Responsibility）

最新推荐文章于 2025-02-17 21:02:53 发布

programmercherry

最新推荐文章于 2025-02-17 21:02:53 发布

阅读量128

点赞数

分类专栏：设计模式 C++ 文章标签：设计模式 c++

本文链接：https://blog.youkuaiyun.com/Acquisition0818/article/details/118099791

版权

C++ 同时被 2 个专栏收录

25 篇文章

订阅专栏

设计模式

16 篇文章

订阅专栏

此代码实例展示了如何运用职责链模式（Chain of Responsibility）来处理加薪和请假申请。通过创建不同级别的管理者（经理、总监、总经理），每个管理者负责处理特定范围内的申请，如果超出权限则将请求传递给上级。这种方式减少了请求发起者与处理者之间的耦合，使得系统更加灵活。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

职责链模式（Chain of Responsibility）

职责链模式（Chain of Responsibility）：使多个对象都有机会处理请求，从而避免请求的发送者和接收者之间的耦合关系。将这个对象连成一条链，并沿着这条链传递该请求，直到有一个对象处理它为止。

在这里插入图片描述

加薪代码实现
在这里插入图片描述

#include <iostream>
using namespace std;

#define SAFE_DELETE(p) {if(p){delete p; p = nullptr;}}

//申请
class Request {
private:
	string requestType;
	string requestContent;
	int requestNumber = 0;
public:
	void SetRequestType(string requestType){
		this->requestType = requestType;
	}
	string GetRequestType() {
		return this->requestType;
	}
	void SetRequestContent(string requestContent) {
		this->requestContent = requestContent;
	}
	string GetRequestContent() {
		return this->requestContent;
	}
	void SetRequestNumber(int requestNumber) {
		this->requestNumber = requestNumber;
	}
	int GetRequestNumber() {
		return this->requestNumber;
	}

};

//抽象管理者
class Manager {
protected:
	string name;
	Manager* superior = nullptr;
public:
	Manager(string name) {
		this->name = name;
	}
	//设置管理者的上级
	virtual void SetSuperior(Manager* superior) {
		this->superior = superior;
	}
	//申请请求
	virtual void RequestApplications(Request* request) {}
};
//经理
class CommonManager :public Manager {
public:
	CommonManager(string name):Manager(name){}
	void RequestApplications(Request* request) {
		if (request->GetRequestType() == "请假" && request->GetRequestNumber() <= 2) {
			cout << name << "：" << request->GetRequestContent() << " " << request->GetRequestNumber() << " 被批准" << endl;
		}
		else {
			if (superior != nullptr) {
				superior->RequestApplications(request);
			}
		}
	}
};
//总监
class Majordomo :public Manager {
public:
	Majordomo(string name) :Manager(name) {}
	void RequestApplications(Request* request) {
		if (request->GetRequestType() == "请假" && request->GetRequestNumber() <= 5) {
			cout << name << "：" << request->GetRequestContent() << " " << request->GetRequestNumber() << " 被批准" << endl;
		}
		else {
			if (superior != nullptr) {
				superior->RequestApplications(request);
			}
		}
	}
};
//总经理
class GeneralManager :public Manager {
public:
	GeneralManager(string name) :Manager(name) {}
	void RequestApplications(Request* request) {
		if (request->GetRequestType() == "请假") {
			cout << name << "：" << request->GetRequestContent() << " " << request->GetRequestNumber() << " 被批准" << endl;
		}
		else if (request->GetRequestType() == "加薪" && request->GetRequestNumber() <= 500) {
			cout << name << "：" << request->GetRequestContent() << " " << request->GetRequestNumber() << " 被批准" << endl;
		}
		else if (request->GetRequestType() == "加薪" && request->GetRequestNumber() > 500) {
			cout << name << "：" << request->GetRequestContent() << " " << request->GetRequestNumber() << " 再说吧" << endl;
		}
	}
};

//客户端
void test01() {
	CommonManager* jingli = new CommonManager("经理");
	Majordomo* zongjian = new Majordomo("总监");
	GeneralManager* zongjingli = new GeneralManager("总经理");
	jingli->SetSuperior(zongjian);
	zongjian->SetSuperior(zongjingli);

	Request* request1 = new Request();
	request1->SetRequestType("请假");
	request1->SetRequestContent("小菜请假");
	request1->SetRequestNumber(1);
	jingli->RequestApplications(request1);  //注意 申请都是由“经理”发出的

	Request* request2 = new Request();
	request2->SetRequestType("请假");
	request2->SetRequestContent("小菜请假");
	request2->SetRequestNumber(4);
	jingli->RequestApplications(request2);  //注意 申请都是由“经理”发出的

	Request* request3 = new Request();
	request3->SetRequestType("加薪");
	request3->SetRequestContent("小菜请求加薪");
	request3->SetRequestNumber(900);
	jingli->RequestApplications(request3);  //注意 申请都是由“经理”发出的

	SAFE_DELETE(request3);
	SAFE_DELETE(request2);
	SAFE_DELETE(request1);
	SAFE_DELETE(zongjingli);
	SAFE_DELETE(zongjian);
	SAFE_DELETE(jingli);
}

int main() {
	test01();

	return 0;
}