用代码和UML图化解设计模式之《抽象工厂模式》

抽象工厂模式，就是把工厂类也给他多态了。

 

根据需求不同的工厂生产不品种的实体。比如在游戏中。 纯在vip用户对应的vip的宠物对应的vip的怪物，或者vip任务。因此，vip工厂就生产vip这些东西了。但是普通的也要生产。因此 就抽象出来两个类了。

 

下面我是根据游戏中，不同的角色来定义的一些实体类。直接上图，大家就看明白了

 

 

也就是特殊对象特殊对待。因此工厂就要特殊了。也就是要把工厂类抽象出来一个。

 

下面就上打码了，代码量比较大。。不过自己很快就实现了。

/************************************************************************/  /* @filename    abstractFactory.cpp    04.   @author       wallwind    05.   @createtime    2012/10/21 00:40   06.   @function      抽象工厂模式    07.   @email       [e-mail]    08.*/     /************************************************************************/  #include "stdafx.h"#include <iostream>using namespace std;//用户类class User{public: User (){}virtual ~User (){}virtual void attack() = 0;virtual void defense() = 0;};//怪物类class Monster{public: Monster (){}virtual ~Monster (){}virtual void attack() = 0;virtual void defense() = 0;};//宠物类class Pet{public: Pet (){}virtual ~Pet (){}virtual void attack() = 0;virtual void defense() = 0;};//游戏中还有很多角色。比如刀客，异人等class SwordUser:public User{public:SwordUser(){}~SwordUser(){}void attack(){cout<<"SwordUser:attack"<<endl;}void defense(){cout<<"SwordUser:defense"<<endl;}};class SpecialUser:public User{public:SpecialUser(){}~SpecialUser(){}void attack(){cout<<"SpecialUser:attack"<<endl;}void defense(){cout<<"SpecialUser:defense"<<endl;}};//////怪物氛围一般的怪物，和BOSS类。class GeneralMonster:public Monster{public:GeneralMonster(){}~GeneralMonster(){}void attack(){cout<<"GeneralMonster:attack"<<endl;}void defense(){cout<<"GeneralMonster:defense"<<endl;}};class BossMonster:public Monster{public:BossMonster(){}~BossMonster(){}void attack(){cout<<"BossMonster:attack"<<endl;}void defense(){cout<<"BossMonster:defense"<<endl;}};////宠物很多种，比如用来进攻的。还有用来骑得等等class AttackPet:public Pet{public:AttackPet(){}~AttackPet(){}void attack(){cout<<"AttackPet:attack"<<endl;}void defense(){cout<<"AttackPet:defense"<<endl;}};class GeneralPet:public Pet{public:GeneralPet(){}~GeneralPet(){}void attack(){cout<<"GeneralPet:attack"<<endl;}void defense(){cout<<"GeneralPet:defense"<<endl;}};////抽象工厂类class AbstractFactory{public:AbstractFactory(){}virtual ~AbstractFactory(){}virtual User * createUser() = 0;virtual Monster* createMonster() = 0;virtual Pet* createPet() = 0;};class SpecialFactory: public AbstractFactory{public :SpecialFactory(){}~SpecialFactory(){}User* createUser(){User *retUser;retUser = new SwordUser();return retUser;}Monster* createMonster(){Monster* retMonster;retMonster = new BossMonster();return retMonster;}Pet* createPet(){Pet* retPet;retPet = new AttackPet();return retPet;}};class GeneralFactory: public AbstractFactory{public :GeneralFactory(){}~GeneralFactory(){}User* createUser(){User *retUser;retUser = new SpecialUser();return retUser;}Monster* createMonster(){Monster* retMonster;retMonster = new GeneralMonster();return retMonster;}Pet* createPet(){Pet* retPet;retPet = new GeneralPet();return retPet;}};class  RoleCreate{public:RoleCreate(AbstractFactory* af):m_role(af){}~RoleCreate(){if (m_role!=NULL){delete m_role;}}void factory(){m_role->createUser()->attack();m_role->createMonster()->attack();m_role->createPet()->attack();}private:AbstractFactory* m_role;};int _tmain(int argc, _TCHAR* argv[]){AbstractFactory* factory;factory= new SpecialFactory();RoleCreate role(factory);role.factory();factory = new GeneralFactory();RoleCreate role1(factory);role1.factory();if (factory!=NULL){delete factory;factory =NULL;}return 0;}

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