设计模式——建造者模式

一、任务

使用建造者模式，完成下述任务：计算机组装工厂可以将CPU、内存、硬盘、主机等硬件设备组装在一起构成计算机，计算机的类型可以是笔记本，也可以是台式机。

二、类图

三、代码

1、Java代码

package tutorial5;

public class BuilderComputer {
    public void builderDesktop() {
        
    }
    public  void builderLaptop() {
        
    }
}

package tutorial5;

public class ProductComputer  {
    public Desktop desktop;
    public Laptop laptop;
    
    public ProductComputer() {
        
    }
    
    public void showDesktop(Desktop desktop2) {
        System.out.println("现在展示笔记本计算机的组成：");
    
        desktop2.builderDesktop();
    }
    public void showLaptop(Laptop laptop2) {
        System.out.println("现在展示台式机计算机的组成：");
        laptop2.builderLaptop();
    }

}

package tutorial5;

import java.util.Scanner;

public class Director {
    public static void main(String []args) {
        ProductComputer product=new ProductComputer();
        Desktop desktop=new Desktop();
        Laptop laptop=new Laptop();
        boolean flag=true;
        while(flag) {
            System.out.println("1、组装笔记本电脑！！！");
            System.out.println("2、组装台式机电脑！！！");
            System.out.println("3、退出！！！");
            System.out.println("请进行选择：");
            Scanner in =new Scanner(System.in);
            int a=in.nextInt();
        if(a==1) {
            product.showDesktop(desktop);
        }else if(a==2) {
            product.showLaptop(laptop);
        }else if(a==3) {
            System.out.println("欢迎下次组装！！！");
            break;
        }else {
            flag=false;
            System.out.println("请重新输入！！！");
        }
    }
    }

}

package tutorial5;

public class Desktop extends ConcreteBuilderComputer {
    private String CPU;
    private String zhuji;
    private String neicun;
    private String yingpan;
    public String getCPU() {
        return CPU;
    }
    public void setCPU(String cPU) {
        CPU = cPU;
    }
    public String getZhuji() {
        return zhuji;
    }
    public void setZhuji(String zhuji) {
        this.zhuji = zhuji;
    }
    public String getNeicun() {
        return neicun;
    }
    public void setNeicun(String neicun) {
        this.neicun = neicun;
    }
    public String getYingpan() {
        return yingpan;
    }
    public void setYingpan(String yingpan) {
        this.yingpan = yingpan;
    }
    public Desktop(String cPU, String zhuji, String neicun, String yingpan) {
        super();
        CPU = cPU;
        this.zhuji = zhuji;
        this.neicun = neicun;
        this.yingpan = yingpan;
    }
    public Desktop() {
        
    }
    @Override
    public void builderDesktop() {
        System.out.println("笔记本电脑组成有：");
        System.out.println("笔记本硬盘、主机、内存、CPU");
        System.out.println("****************************");
    }
    
}

package tutorial5;

public class Laptop extends ConcreteBuilderComputer {
    private String CPU;
    private String zhuji;
    private String neicun;
    private String yingpan;
    public String getCPU() {
        return CPU;
    }
    public void setCPU(String cPU) {
        CPU = cPU;
    }
    public String getZhuji() {
        return zhuji;
    }
    public void setZhuji(String zhuji) {
        this.zhuji = zhuji;
    }
    public String getNeicun() {
        return neicun;
    }
    public void setNeicun(String neicun) {
        this.neicun = neicun;
    }
    public String getYingpan() {
        return yingpan;
    }
    public void setYingpan(String yingpan) {
        this.yingpan = yingpan;
    }
    public Laptop(String cPU, String zhuji, String neicun, String yingpan) {
        super();
        CPU = cPU;
        this.zhuji = zhuji;
        this.neicun = neicun;
        this.yingpan = yingpan;
    }
    public Laptop() {
        
    }
    @Override
    public void builderLaptop() {
        System.out.println("台式机电脑组成有：");
        System.out.println("台式机硬盘、主机、内存、CPU");
        System.out.println("****************************");
    }
    
}

2、C++

#include <iostream>
#include <vector>
using namespace std;

//class Builder;

// Product
class ProductComputer
{



public:
    void ShowDesktop()
    {
       
        cout << "笔记本计算机已经组装好！！！" << endl<<endl;
        cout << "笔记本组成为：" << endl;
        cout << "CPU" << endl;
        cout << "内存" << endl;
        cout << "硬盘" << endl;
        cout << "主机" << endl;
        cout << "************************" << endl;
    }
    void ShowLaptop()
    {
        cout << "台式机计算机已经组装好！！！" << endl<<endl;
        cout << "台式机组成为：" << endl;
        cout << "CPU" << endl;
        cout << "内存" << endl;
        cout << "硬盘" << endl;
        cout << "主机" << endl;
    }

};

// Builder
class BuilderComputer
{
public:
    virtual void BuildDesktop() {}
    virtual void BuildLaptop() {}
    virtual ProductComputer* GetProduct() { return NULL; }
};

// ConcreteBuilder
class Desktop : public BuilderComputer
{
public:
    Desktop() { m_Product = new ProductComputer(); }
    void BuildDesktop() {
        m_Product->ShowDesktop();
    }
    void BuildLaptop() {
        
    }
    ProductComputer* GetProduct() { return m_Product; }

private:
    ProductComputer* m_Product;
};


class Laptop : public BuilderComputer
{
private:
    ProductComputer* m_Product;
public:
    Laptop() { m_Product = new ProductComputer(); }
    void BuildDesktop() {
       
    }
    void BuildLaptop() {
        m_Product->ShowLaptop();
    }

    ProductComputer* GetProduct() { return m_Product; }

};
// Director
class Director
{
public:
    Director(BuilderComputer* builder) { m_Builder = builder; }
    void CreateProduct()
    {
        m_Builder->BuildDesktop();
        m_Builder->BuildLaptop();
    }

private:
    BuilderComputer* m_Builder;
};

// main
int main()
{
    int choice;
    cout << "************************" << endl;
    cout << "请选择组装计算机：" << endl;
    cout << "1、组装笔记本：" << endl;
    cout << "2、组装台式机：" << endl;
    cout << "请选择：" << endl;
    cout << "************************" << endl;
    cin >> choice;
    if (choice == 1) {
        BuilderComputer* builderObj1 = new Desktop();
        Director directorObj1(builderObj1);
        directorObj1.CreateProduct();
        ProductComputer* productObj1 = builderObj1->GetProduct();
        if (productObj1  == NULL)
        {
            return 0;
        }
        //productObj1->ShowDesktop();
        delete productObj1;
        productObj1 = NULL;
        delete builderObj1;
        builderObj1 = NULL;

    }
    else if (choice == 2) {

        BuilderComputer* builderObj2 = new Laptop();
        Director directorObj2(builderObj2);
        directorObj2.CreateProduct();
        ProductComputer* productObj2 = builderObj2->GetProduct();
        //productObj2->ShowLaptop();
        delete productObj2;
        productObj2 = NULL;
        delete builderObj2;
        builderObj2 = NULL;
    }
    else {
        cout << "输入错误！！！！" << endl;
    }
}

四、结果截图

Java