[行为型模式] 模板方法模式的理解

末蓝、 2022-04-11 05:38 220阅读 0赞

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\[color=red\]\[b\]头文件\[/b\]\[/color\]

//TemplateMethodPattern.h
    
    #ifndef TEMPLATE_METHOD_PATTERN_H
    #define TEMPLATE_METHOD_PATTERN_H
    
    #include <Windows.h>
    #include <iostream>
    using namespace std;
    
    namespace TemplateMethodPattern
    {
       
        //
        class AbstractClass
        {
       
        public:
            AbstractClass();
            virtual ~AbstractClass();
    
            void TemplateMethod();
    
        protected:
            virtual void PrimitiveOperation1() = 0;
            virtual void PrimitiveOperation2() = 0;
        };
    
        //
        class ConcreteClassA : public AbstractClass
        {
       
        public:
            ConcreteClassA();
            virtual ~ConcreteClassA();
    
        protected:
            virtual void PrimitiveOperation1();
            virtual void PrimitiveOperation2();
        };
    
        //
        class ConcreteClassB : public AbstractClass
        {
       
        public:
            ConcreteClassB();
            virtual ~ConcreteClassB();
    
        protected:
            virtual void PrimitiveOperation1();
            virtual void PrimitiveOperation2();
        };
    
        //
        void TemplateMethodPattern_Test();
    }
    
    #endif

\[color=red\]\[b\]实现\[/b\]\[/color\]

#include "TemplateMethodPattern.h"
    
    namespace TemplateMethodPattern
    {
       
        //
        AbstractClass::AbstractClass()
        {}
    
        AbstractClass::~AbstractClass()
        {}
    
        void AbstractClass::TemplateMethod()
        {
       
            PrimitiveOperation1();
            cout<<"TemplateMethod"<<endl;
            PrimitiveOperation2();
        }
    
        void AbstractClass::PrimitiveOperation1()
        {
       
            cout<<"Default Operation1"<<endl;
        }
    
        void AbstractClass::PrimitiveOperation2()
        {
       
            cout<<"Default Operation2"<<endl;
        }
    
        //
        ConcreteClassA::ConcreteClassA()
        {}
    
        ConcreteClassA::~ConcreteClassA()
        {}
    
        void ConcreteClassA::PrimitiveOperation1()
        {
       
            cout<<"ConcreteA Operation1"<<endl;
        }
    
        void ConcreteClassA::PrimitiveOperation2()
        {
       
            cout<<"ConcreteA Operation2"<<endl;
        }
    
        //
        ConcreteClassB::ConcreteClassB(){}
        ConcreteClassB::~ConcreteClassB(){}
        void ConcreteClassB::PrimitiveOperation1()
        {
       
            cout<<"ConcreteB Operation1"<<endl;
        }
    
        void ConcreteClassB::PrimitiveOperation2()
        {
       
            cout<<"ConcreteB Operation2"<<endl;
        }
    
        //
        void TemplateMethodPattern_Test()
        {
       
            AbstractClass *pAbstractA = new ConcreteClassA;
            pAbstractA->TemplateMethod();
    
            AbstractClass *pAbstractB = new ConcreteClassB;
            pAbstractB->TemplateMethod();
    
            if (pAbstractA) delete pAbstractA;
            if (pAbstractB) delete pAbstractB;
        }
    }

\[color=red\]\[b\]客户端\[/b\]\[/color\]

#include "TemplateMethodPattern.h"
    
    
    #include <iostream>
    using namespace std;
    using namespace TemplateMethodPattern;
    
    void main()
    {
       
        TemplateMethodPattern_Test();
    }

\[color=red\]\[b\]运行结果\[/b\]\[/color\]  
\[img\]http://chuantu.biz/t5/9/1465887014x3738746553.jpg\[/img\]  
  
  
\[color=red\]\[b\]用例模型\[/b\]\[/color\]  
\[img\]http://code.uml.com.cn/code/images/Template2.png\[/img\]  
  
\[img\]http://chuantu.biz/t5/9/1465887389x3738746553.jpg\[/img\]  
  
\[color=red\]\[b\]设计类图\[/b\]\[/color\]  
\[img\]http://code.uml.com.cn/code/images/Template3.png\[/img\]  
  
\[color=red\]\[b\]顺序图\[/b\]\[/color\]  
\[img\]http://code.uml.com.cn/code/images/Template4.png\[/img\]