C++设计模式---抽象工厂模式

小鱼儿 2022-05-28 14:07 239阅读 0赞

定义了一个创建一系列相关或相互依赖的接口，而无需制定它们的具体类。

用于交换产品系列，产品的具体类名被具体工厂实现分离

简单来说就是，工厂还是两个，可以生产A系列的产品，B系列的产品

//抽象工厂模式
    class Product
    {
    public:
    	Product() {}
    	virtual ~Product() {}
    public:
    	virtual void operation() = 0;
    };
    //产品A
    class ProductA :public Product
    {
    public:
    	ProductA() {}
    	virtual ~ProductA() {}
    public:
    	void operation() { cout << "ProductA" << endl; }
    };
    //产品B
    class ProductB :public Product
    {
    public:
    	ProductB() {}
    	virtual ~ProductB() {}
    public:
    	void operation() { cout << "ProductB" << endl; }
    };
    //产品
    class Product1
    {
    public:
    	Product1() {}
    	virtual ~Product1() {}
    public:
    	virtual void operation() = 0;
    };
    //产品A1
    class ProductA1 :public Product1
    {
    public:
    	ProductA1() {}
    	virtual ~ProductA1() {}
    public:
    	void operation() { cout << "ProductA1" << endl; }
    };
    //产品B1
    class ProductB1 :public Product1
    {
    public:
    	ProductB1() {}
    	virtual ~ProductB1() {}
    public:
    	void operation() { cout << "ProductB1" << endl; }
    };
    
    
    //工厂
    class Factory
    {
    public:
    	virtual Product *CreatProduct() = 0;
    	virtual Product1 *CreatProduct1() = 0;
    };
    //工厂A专门用来生成产品A系列
    class FactoryA :public Factory
    {
    public:
    	Product * CreatProduct() { return new ProductA(); }
    	Product1 * CreatProduct1() { return new ProductA1(); }
    };
    // 工厂B专门用来生成产品B系列
    class FactoryB : public Factory
    {
    public:
    	Product * CreatProduct() { return new ProductB(); }
    	Product1 * CreatProduct1() { return new ProductB1(); }
    };
    int main()
    {
    	Factory	* pfa = new FactoryA();
    	Product *ppa = pfa->CreatProduct();
    	ppa->operation();
    
    	Product1 *ppa1 = pfa->CreatProduct1();
    	ppa1->operation();
    
    	Factory * pfb = new FactoryB();
    	Product *ppb = pfb->CreatProduct();
    	ppb->operation();
    
    	Product1 *ppb1 = pfb->CreatProduct1();
    	ppb1->operation();
    	return 0;
    }

抽象工厂模式图

![70][]

[70]: /images/20220528/ead2476006e34116a2e22fc53a959b24.png