设计模式之Builder模式

Builder模式的关键是其中的Director对象并不直接返回对象，而是通过一步步来一步步进行对象的创建。当然这里Director可以提供一个默认的返回对象的接口（即返回通用的复杂对象的创建，即不指定或者特定唯一指定BuilderProduct*中的参数）。

Product.h

#ifndef _PRODUCT_H_#define _PRODUCT_H_class CProduct{public :CProduct();~CProduct();};#endif

Produce.cpp

#include "Product.h"CProduct::CProduct(){}CProduct::~CProduct(){}

Builder.h

#ifndef __BUILDER_H_#define __BUILDER_H_#include "Product.h"#include <string>#include <iostream>using namespace std;class CBuilder  //As a Interface{public:CBuilder();~CBuilder();virtual void BuilderProductA(const string A)=0;virtual void BuilderProductB(const string B)=0;virtual void BuilderProductC(const string C)=0;virtual CProduct *GetProduct()=0;};#endif

Builder.cpp

#include "Builder.h"CBuilder::CBuilder(){}CBuilder::~CBuilder(){}

 

 

ConcreterBuilder.h

#ifndef __CONCERTERBUILDER_H_#define __CONCERTERBUILDER_H_#include "Product.h"#include "Builder.h"class CConcerterBuilder:public CBuilder{public:CConcerterBuilder();~CConcerterBuilder();void BuilderProductA(const string A);void BuilderProductB(const string B);void BuilderProductC(const string C);CProduct *GetProduct();};#endif

 

 

ConcreterBuilder.cpp

#include "ConcreterBuilder.h"CConcerterBuilder::CConcerterBuilder(){}CConcerterBuilder::~CConcerterBuilder(){}void CConcerterBuilder::BuilderProductA(const string A){cout<<A<<endl;}void CConcerterBuilder::BuilderProductB(const string B){cout<<B<<endl;}void CConcerterBuilder::BuilderProductC(const string C){cout<<C<<endl;}CProduct * CConcerterBuilder::GetProduct(){return new CProduct;}

Main.cpp

#include <iostream>#include "Director.h"#include "ConcreterBuilder.h"using namespace std;int main(){ CDirector *pDir=new CDirector(new CConcerterBuilder()); pDir->Construct(); delete pDir; return 0;}