软件设计                  石家庄铁道大学信息学院

实验5：建造者模式

本次实验属于模仿型实验，通过本次实验学生将掌握以下内容：

1、理解建造者模式的动机，掌握该模式的结构；

2、能够利用建造者模式解决实际问题。

[实验任务一]：计算机组装

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。

实验要求：

1. 画出对应的类图；

2. 提交源代码；

Client：

package builder;

import java.util.Scanner;

public class Client {
    public static void main(String[] args) {
        System.out.println("请选择组装的电脑类型：1 笔记本 2 台式机");
        Scanner sc = new Scanner(System.in);
        String type = sc.nextLine();
        if(type.equals("1")) {
            Director director = new Director();
            Builder builder = new Laptop();
            director.setBuilder(builder);
            Computer computer = director.construct();
            System.out.println("组装进行：");
            System.out.println(computer.getCpu());
            System.out.println(computer.getNeichun());
            System.out.println(computer.getYingjian());
            System.out.println(computer.getZhuji());
        }else if(type.equals("2")) {
            Director director = new Director();
            Builder builder = new Desktop();
            director.setBuilder(builder);
            Computer computer = director.construct();
            System.out.println("组装进行：");
            System.out.println(computer.getCpu());
            System.out.println(computer.getNeichun());
            System.out.println(computer.getYingjian());
            System.out.println(computer.getZhuji());
        }
    }
}

Bulider：

package builder;

public abstract class Builder {

    protected Computer computer = new Computer();

    public abstract  void buildCpu();

    public abstract  void buildNeichun();

    public abstract  void buildYingpan();

    public abstract void buildZhuji();

    public Computer getResult()
    {
        return computer;
    }
}

Computer：

package builder;

public class Computer {
    private String cpu;
    private String neichun;
    private String yingjian;
    private String zhuji;

    public String getCpu() {
        return cpu;
    }

    public void setCpu(String cpu) {
        this.cpu = cpu;
    }

    public String getNeichun() {
        return neichun;
    }

    public void setNeichun(String neichun) {
        this.neichun = neichun;
    }

    public String getYingjian() {
        return yingjian;
    }

    public void setYingjian(String yingjian) {
        this.yingjian = yingjian;
    }

    public String getZhuji() {
        return zhuji;
    }

    public void setZhuji(String zhuji) {
        this.zhuji = zhuji;
    }
}

Desktop：

package builder;

public class Desktop extends Builder{
    @Override
    public void buildCpu() {
        computer.setCpu("台式CPU");
    }

    @Override
    public void buildNeichun() {
        computer.setNeichun("台式内存");
    }

    @Override
    public void buildYingpan() {
        computer.setYingjian("台式硬件");
    }

    @Override
    public void buildZhuji() {
        computer.setZhuji("台式主机");
    }
}

Laptop:

package builder;

public class Laptop extends Builder{
    @Override
    public void buildCpu() {
        computer.setCpu("笔记本CPU");
    }

    @Override
    public void buildNeichun() {
        computer.setNeichun("笔记本内存");
    }

    @Override
    public void buildYingpan() {
        computer.setYingjian("笔记本硬件");
    }

    @Override
    public void buildZhuji() {
        computer.setZhuji("笔记本主机");
    }
}

Director:

package builder;

public class Director {

    public Builder builder;

    public void setBuilder(Builder builder)
    {
        this.builder = builder;
    }

    public Computer construct()
    {
        builder.buildCpu();
        builder.buildZhuji();
        builder.buildNeichun();
        builder.buildYingpan();

        return builder.getResult();
    }
}

3.注意编程规范。