用代码和UML图化解设计模式之《工厂模式》

所谓工厂模式，其实就是用来产生实例的地方。生产某一类型的产品。因此也是利用了类管理和类多态的一个特性吧。

下面直接上图

在Factory 中产生human的实例，

然后通过实例来调用方法。

// Factory.cpp : 定义控制台应用程序的入口点。/************************************************************************//* @filename    Factory.cpp   @author       wallwind   @createtime    2012/10/20 10:36   @function      工厂模式   @email       wochenglin@qq.com*//************************************************************************/#include "stdafx.h"#include <iostream>#include <stdlib.h>using namespace std;enum HumanType{white = 0,black,yello,};class Human{public://Human(){}virtual~Human(){}virtual void run() = 0;virtual void sleep()=0;};class WhiteMan:public Human{public:WhiteMan(){}~WhiteMan(){}void run() {cout<<"WhiteMan:run()"<<endl;}void sleep() {cout<<"WhiteMan:sleep()"<<endl;}};class BlackMan:public Human{public:BlackMan(){}~BlackMan(){}void run() {cout<<"BlackMan:run()"<<endl;}void sleep() {cout<<"BlackMan:sleep()"<<endl;}};class YellowMan:public Human{public:YellowMan(){}~YellowMan(){}void run() {cout<<"YellowMan:run()"<<endl;}void sleep() {cout<<"YellowMan:sleep()"<<endl;}};class HumanFactory{public:HumanFactory(){}~HumanFactory(){}static Human* createHuman(HumanType htp) {Human* human;switch (htp){case white:human = new WhiteMan();break;case black:human = new BlackMan();break;case yello:human = new YellowMan();default:human = NULL;}return human; }};int _tmain(int argc, _TCHAR* argv[]){int type = rand()%2;cout<<type<<endl;Human * mhum; mhum = HumanFactory::createHuman((HumanType)type);if (mhum ==NULL){cout<<"no human"<<endl;exit(0);}mhum->run();mhum->sleep();return 0;}

这个模式，我还要很多思考。其实用很多值得思考的地方。有新的结果，我在写出来。敬请期待

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