目的：当对象的构造很复杂，分为好几部分的时候，可以用建造者模式来处理
把一个复杂对象的构建与它的表示分离，使得同样的构建过程可以创建不同的表示。.
通常把一个复杂对象构建分为几个部分 BuildPartA B C…..
Builder模式有以下几个角色
Builder： 规定一些接口
ConCreateBuilder:Builder 的实现
Director：负责具体的装配调用
版本1：
class Procudt
{
public:
void initPartA(){}
void initPartB(){}
void Print(){ cout << __FUNCTION__ << endl; }
};
class Builder
{
public:
virtual void BuildPartA() = 0;
virtual void BuildPartB() = 0;
virtual Procudt* GetProduct() = 0;
};
class ConCreateBuilder :public Builder
{
Procudt *product;
public:
virtual void BuildPartA()override
{
cout << __FUNCTION__ << endl;
product->initPartA();
}
virtual void BuildPartB()override
{
cout << __FUNCTION__ << endl;
product->initPartB();
}
Procudt * GetProduct()override
{
return product;
}
};
class Director
{
public:
Director(Builder *builder)
{
_builder = builder;
}
void Construct()
{
_builder->BuildPartA();
_builder->BuildPartB();
}
Builder* _builder;
};
int main(int argc, char *argv[])
{
ConCreateBuilder* builder = new ConCreateBuilder;
Director* director = new Director(builder);
director->Construct();
builder->GetProduct()->Print();
system("pause");
return 0;
}- class Procudt
- {
- public:
- void initPartA(){}
- void initPartB(){}
- void Print(){ cout << __FUNCTION__ << endl; }
- };
- class Builder
- {
- public:
- virtual void BuildPartA() = 0;
- virtual void BuildPartB() = 0;
- virtual Procudt* GetProduct() = 0;
- };
- class ConCreateBuilder :public Builder
- {
- Procudt *product;
- public:
- virtual void BuildPartA()override
- {
- cout << __FUNCTION__ << endl;
- product->initPartA();
- }
- virtual void BuildPartB()override
- {
- cout << __FUNCTION__ << endl;
- product->initPartB();
- }
- Procudt * GetProduct()override
- {
- return product;
- }
- };
- class Director
- {
- public:
- Director(Builder *builder)
- {
- _builder = builder;
- }
- void Construct()
- {
- _builder->BuildPartA();
- _builder->BuildPartB();
- }
- Builder* _builder;
- };
- int main(int argc, char *argv[])
- {
- ConCreateBuilder* builder = new ConCreateBuilder;
- Director* director = new Director(builder);
- director->Construct();
- builder->GetProduct()->Print();
- system("pause");
- return 0;
- }
class Procudt
{
public:
void initPartA(){}
void initPartB(){}
void Print(){ cout << __FUNCTION__ << endl; }
};
class Builder
{
public:
virtual void BuildPartA() = 0;
virtual void BuildPartB() = 0;
virtual Procudt* GetProduct() = 0;
};
class ConCreateBuilder :public Builder
{
Procudt *product;
public:
virtual void BuildPartA()override
{
cout << __FUNCTION__ << endl;
product->initPartA();
}
virtual void BuildPartB()override
{
cout << __FUNCTION__ << endl;
product->initPartB();
}
Procudt * GetProduct()override
{
return product;
}
};
class Director
{
public:
Director(Builder *builder)
{
_builder = builder;
}
void Construct()
{
_builder->BuildPartA();
_builder->BuildPartB();
}
Builder* _builder;
};
int main(int argc, char *argv[])
{
ConCreateBuilder* builder = new ConCreateBuilder;
Director* director = new Director(builder);
director->Construct();
builder->GetProduct()->Print();
system("pause");
return 0;
}版本2：
class Director
{
public:
Builder* Construct(Builder *_builder)
{
_builder->BuildPartA();
_builder->BuildPartB();
return _builder;
}
};
int main(int argc, char *argv[])
{
ConCreateBuilder* builder = ;
Director* director = new Director();
Builder *builder = director->Construct(new ConCreateBuilder);
builder->GetProduct()->Print();
system("pause");
return 0;
}
//Director 只是一个 组装- class Director
- {
- public:
- Builder* Construct(Builder *_builder)
- {
- _builder->BuildPartA();
- _builder->BuildPartB();
- return _builder;
- }
- };
- int main(int argc, char *argv[])
- {
- ConCreateBuilder* builder = ;
- Director* director = new Director();
- Builder *builder = director->Construct(new ConCreateBuilder);
- builder->GetProduct()->Print();
- system("pause");
- return 0;
- }
- //Director 只是一个 组装
class Director
{
public:
Builder* Construct(Builder *_builder)
{
_builder->BuildPartA();
_builder->BuildPartB();
return _builder;
}
};
int main(int argc, char *argv[])
{
ConCreateBuilder* builder = ;
Director* director = new Director();
Builder *builder = director->Construct(new ConCreateBuilder);
builder->GetProduct()->Print();
system("pause");
return 0;
}
//Director 只是一个 组装