#pragma once#ifndef BUILDER_H #define BUILDER_H #include <memory> using namespace std; // 虛擬基類,是所有Builder的基類,提供不同部分的構建接口函數 class Builder { public: Builder(){}; virtual ~Builder(){} // 純虛函數,提供構建不同部分的構建接口函數 virtual void BuilderPartA() = 0; virtual void BuilderPartB() = 0; } ; // 使用Builder構建產品,構建產品的過程都一致,但是不同的builder有不同的實現 // 這個不同的實現通過不同的Builder派生類來實現,存有一個Builder的指針,通過這個來實現多態調用 class Director { public: Director(Builder *pBuilder); ~Director(); void Construct(); private: auto_ptr<Builder> m_pBuilder; }; // Builder的派生類,實現BuilderPartA和BuilderPartB接口函數 class ConcreateBuilder1:public Builder { public: ConcreateBuilder1(){} virtual ~ConcreateBuilder1(){} virtual void BuilderPartA(); virtual void BuilderPartB(); }; // Builder的派生類,實現BuilderPartA和BuilderPartB接口函數 class ConcreateBuilder2:public Builder { public: ConcreateBuilder2(){} virtual ~ConcreateBuilder2(){} virtual void BuilderPartA(); virtual void BuilderPartB(); }; #endif
#include "StdAfx.h" #include "builder_impl.h"#include <iostream> using namespace std; void ConcreateBuilder1::BuilderPartA() { std::cout<<" BuilderPartA by ConcreateBuilder1:"<<this<<endl; } void ConcreateBuilder1::BuilderPartB() { std::cout<<" BuilderPartB by ConcreateBuilder1:"<<this<<endl; } void ConcreateBuilder2::BuilderPartA() { std::cout<<" BuilderPartA by ConcreateBuilder2:"<<this<<endl; } void ConcreateBuilder2::BuilderPartB() { std::cout<<" BuilderPartB by ConcreateBuilder2:"<<this<<endl; } Director::Director(Builder * pBuilder) : m_pBuilder(pBuilder) { } Director:: ~Director() { } // Construct 函數表示一個對象的整個構建過程,不同的部分之間的裝配方式都是一致的, // 首先構建PartA 其次是PartB,只是根據不同的構建者會有不同的表示 void Director::Construct() { m_pBuilder -> BuilderPartA(); m_pBuilder -> BuilderPartB(); }
// Builder.cpp : 定義控制臺應用程序的入口點。 //#include "stdafx.h"#include "builder_impl.h" #include <stdlib.h> #include <memory> // 將一個復雜對象的構建與它的表示分離，使得同樣的構建過程可以創建不同的表示 using namespace std; int _tmain(int argc, _TCHAR* argv[]) {//構建過程一樣，根據裝載builder1和builder2創建不同表示auto_ptr<Director> pDirector1(new Director(new ConcreateBuilder1));pDirector1->Construct();auto_ptr<Director> pDirector2(new Director(new ConcreateBuilder2)); pDirector2->Construct(); system( " pause " ); return 0; }

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