抽象工廠模式是所有形態的工廠模式中最為抽象最為一般性的。抽象工廠模式可以向客戶端提供一個介面，使得客戶端在不必指定產品具體型別的情況下，能夠建立多個產品族的產品物件。

備註：工廠模式要麼生產香蕉、要麼生產蘋果、要麼生產西紅柿；但是不能生產一個產品組。抽象工廠能夠生產一個產品組。

具體工廠在開閉原則下，能生產香蕉或者蘋果或者梨子（產品等級結構）

工廠模式只能生產一個產品。（要麼香蕉，要麼蘋果）

4).具體產品（Concrete Product）角色：抽象模式所建立的具體例項物件。

               抽象工廠UML類圖

3.示例程式碼：

abstractfactory.h

#ifndef _ABSTRACTFACTORY_H_
#define _ABSTRACTFACTORY_H_

#include <iostream>

using namespace std;

class Fruit
{
public:
    virtual void SayName() = 0;
};

class AbstractFactory
{
public:
    virtual Fruit* CreateBanana() = 0;
    virtual Fruit* CreateApple() = 0;
};

class NorthBanana : public Fruit
{
public:
    virtual void SayName()
    {
        cout << "north banana" << endl;
    }
};

class NorthApple : public Fruit
{
public:
    virtual void SayName()
    {
        cout << "north apple" << endl;
    }
};

class SourthBanana : public Fruit
{
public:
    virtual void SayName()
    {
        cout << "Sourth banana" << endl;
    }
};

class SourthApple : public Fruit
{
public:
    virtual void SayName()
    {
        cout << "Sourth apple" << endl;
    }
};


class NorthFactory : public AbstractFactory
{
public:
    virtual Fruit* CreateBanana()
    {
        return new NorthBanana;
    }

    virtual Fruit* CreateApple()
    {
        return new NorthApple;
    }
};

class SourthFactory : public AbstractFactory
{
public:
    virtual Fruit* CreateBanana()
    {
        return new SourthBanana;
    }

    virtual Fruit* CreateApple()
    {
        return new SourthApple;
    }
};

#endif /*_ABSTRACTFACTORY_H_*/
 

#include <iostream>
#include "abstractfactory.h"

using namespace std;

int main()
{
    Fruit *fruit = NULL;
    AbstractFactory *af = NULL;

    af = new SourthFactory;
    fruit = af->CreateApple();
    fruit->SayName();
    delete fruit;
    fruit = af->CreateBanana();
    fruit->SayName();
    delete fruit;

    af = new NorthFactory;
    fruit = af->CreateApple();
    fruit->SayName();
    delete fruit;
    fruit = af->CreateBanana();
    fruit->SayName();
    delete fruit;

    delete af;
    delete fruit;

    return 0;
}