装饰者模式(例子)

根据上述要求来用建造者模式设计程序。我将程序放在了https://github.com/RoyalBob/Decorator-Mode-Practice.git   欢迎访问。

以下是本程序的UML图以及代码：

1、创建抽象组件类MobilePhone。

public abstract class MobilePhone
{
    public String phoneName;
    public abstract void SendMessage();
    public abstract void Call();
}

2、分别创建具体组件小米和苹果手机类，继承自MobilePhone。

public class MiPhone extends MobilePhone{

    public MiPhone() {
        // TODO Auto-generated constructor stub
        phoneName="MiPhone";
    }
    @Override
    public void SendMessage() {
        // TODO Auto-generated method stub
        System.out.println( phoneName+"'s SendMessage." );
    }

    @Override
    public void Call() {
        // TODO Auto-generated method stub
        System.out.println( phoneName+"'s Call.");
    }

}

public class iPhone extends MobilePhone{

    public iPhone() {
        // TODO Auto-generated constructor stub
        phoneName="iPhone";
    }
    
    @Override
    public void SendMessage() {
        // TODO Auto-generated method stub
        System.out.println( phoneName+"'s SendMessage." );
    }

    @Override
    public void Call() {
        // TODO Auto-generated method stub
        System.out.println( phoneName+"'s Call.");
    }

}

3、创建抽象装饰类Decorator，包含一个MobilePhone类型的私有变量。

public class Decorator extends MobilePhone{

    private MobilePhone _mobilePhone;
    
    public Decorator(MobilePhone mobilePhone){
        _mobilePhone=mobilePhone;
        phoneName=mobilePhone.phoneName;
    }
    @Override
    public void SendMessage() {
        // TODO Auto-generated method stub
        _mobilePhone.SendMessage();
    }

    @Override
    public void Call() {
        // TODO Auto-generated method stub
        _mobilePhone.Call();
    }

}

4、分别创建具体装饰类Bluetooth、GPS、Camera。

public class Bluetooth extends Decorator{

    public Bluetooth(MobilePhone mobilePhone) {
        super(mobilePhone);
        // TODO Auto-generated constructor stub
    }
    
    public void Connect()
    {
        System.out.println( phoneName+"增加蓝牙功能。" );
    }
}

public class GPS extends Decorator{

    public GPS(MobilePhone mobilePhone) {
        super(mobilePhone);
        // TODO Auto-generated constructor stub
    }

    public String Location;
}

public class Camera extends Decorator{

    public Camera(MobilePhone mobilePhone) {
        super(mobilePhone);
        // TODO Auto-generated constructor stub
    }

    public void VideoCall(){
        System.out.println(phoneName+"增加视频电话功能。");
    }
}

5、书写主函数Main来分别创建小米手机和苹果手机，并且分别加上蓝牙功能、GPS功能和视频通话功能。

public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        MiPhone miPhone=new MiPhone();
        iPhone iphone=new iPhone();
        
        Bluetooth miBluetooth=new Bluetooth(miPhone);
        miBluetooth.Connect();
        GPS miGPS=new GPS(miPhone);
        miGPS.Location="MiPhone的定位成功";
        System.out.println(miGPS.Location);
        Camera miCamera=new Camera(miPhone);
        miCamera.VideoCall();
        
        Bluetooth iBluetooth=new Bluetooth(iphone);
        iBluetooth.Connect();
        GPS iGPS=new GPS(iphone);
        miGPS.Location="iPhone的定位成功";
        System.out.println(miGPS.Location);
        Camera iCamera=new Camera(iphone);
        iCamera.VideoCall();
    }

}

输出结果看是否符合要求：