介绍参见菜鸟教程
下面给出C++的一个例子
#include<iostream> #include<memory> using namespace std; //shap接口 class shap { public: virtual void draw() {}; }; //shap接口的实现类 class Rect : public shap { public: void draw() { std::cout << "生成一个矩形" << std::endl; } }; class Squ : public shap { public: void draw() { std::cout << "生成一个正方形" << std::endl; } }; class Circ : public shap { public: void draw() { std::cout << "生成一个圆" << std::endl; } }; //color接口 class color { public: virtual void fill() {}; }; //color 实现类 class Red : public color { public: void fill() { std::cout << "填充红色" << std::endl; } }; class Green : public color { public: void fill() { std::cout << "填充绿色" << std::endl; } }; class Blue : public color { public: void fill() { std::cout << "填充蓝色" << std::endl; } }; //为 Color 和 Shape 对象创建抽象类来获取工厂 class AbstractFactory { public: virtual color* GetColor(string strColor) { return 0; }; virtual shap* GetShap(string strShap) { return 0; }; }; //创建shap工厂 class ShapFactory : public AbstractFactory { public: ShapFactory() { cShap = NULL; } ~ShapFactory() { ReleaseFactouy(); } shap* GetShap(string strShap) { if (strShap.compare("rectangle") == 0) { cShap = new Rect; } if (strShap.compare("square") == 0) { cShap = new Squ; } if (strShap.compare("circle") == 0) { cShap = new Circ; } return cShap; } void ReleaseFactouy() { if (cShap != NULL) { delete cShap; } } private: shap * cShap; }; //创建色彩工厂 class ColorFactory : public AbstractFactory { public: ColorFactory() { cColor = NULL; } ~ColorFactory() { ReleaseFactouy(); } color* GetColor(string strColor) { if (strColor.compare("red") == 0) { cColor = new Red; } if (strColor.compare("green") == 0) { cColor = new Green; } if (strColor.compare("blue") == 0) { cColor = new Blue; } return cColor; } void ReleaseFactouy() { if (cColor != NULL) { delete cColor; } } private: color * cColor; }; //创建一个工厂创造器/生成器类,通过传递形状或颜色信息来获取工厂 class FactroyProduce { private: FactroyProduce() {}; ~FactroyProduce() {}; int i; public: static AbstractFactory* GetFactory(string strFact) { if (strFact.compare("shap") == 0 ) { cout << "新的mew1" << endl; return new ShapFactory; } else if (strFact.compare("color") == 0) { cout << "新的mew2" << endl; return new ColorFactory; } else { return NULL; } } }; int main() { shared_ptr<AbstractFactory> AbsFact(FactroyProduce::GetFactory("shap")); shap* shap1 = AbsFact->GetShap("rectangle"); shap1->draw(); //生成一个矩形 //... shared_ptr<AbstractFactory> AbsFact2(FactroyProduce::GetFactory("color")); color* color1 = AbsFact2->GetColor("red"); color1->fill(); //生成红色 //... return 0; }
原文地址:https://www.cnblogs.com/gardenofhu/p/8488118.html
时间: 2024-10-31 08:46:28