用装饰模式模拟手机功能的升级过程：简单的手机(SimplePhone)在接收来电时，会发出声音提醒主人；而JarPhone除了声音还能振动；更高级的手机(ComplexPhone)除了声音、振动外，还有灯光闪烁提示。

类图：

Java代码：

public class Changer implements Phone{

    private Phone phone;

    public Changer(Phone p) {

        this.phone=p;

    }

    public void voice() {

        phone.voice();

    }

}

public class ComplexPhone extends Changer{

    public ComplexPhone(Phone p) {

        super(p);

        System.out.println("ComplexPhone");

    }

    public void zhendong() {

        System.out.println("会震动！");

    }

    public void dengguang() {

        System.out.println("会发光！");

    }

}

public class JarPhone extends Changer{

    public JarPhone(Phone p) {

        super(p);

        System.out.println("Jarphone");

    }

    public void zhendong() {

        System.out.println("会震动！");

    }

}

public interface Phone {

    public void voice();

}

public class SimplePhone implements Phone{

     public void voice() {

            System.out.println("发出声音！");

        }

}

public class Client {

    public static void main(String[] args) {

        Phone phone;

        phone=new SimplePhone();

        phone.voice();

        JarPhone jarphone=new JarPhone(phone);

        jarphone.voice();

        jarphone.zhendong();

        ComplexPhone complexphone = new ComplexPhone(phone);

        complexphone.zhendong();

        complexphone.dengguang();

    }

}

C++代码：

#include <iostream>

using namespace std;

class Phone

{

public:

    virtual void receiveCall(){};

};

class SimplePhone:public Phone

{

public:

    virtual void receiveCall(){

        cout<<"发出声音!"<<endl;

    }

};

class PhoneDecorator:public Phone {

protected:

    Phone *phone;

public:

    PhoneDecorator(Phone *p)

    {

        phone=p;

    }

    virtual void receiveCall()

    {

        phone->receiveCall();

    }

};

class JarPhone:public PhoneDecorator{

public:

    JarPhone(Phone *p):PhoneDecorator(p){}

    void receiveCall()

    {

        phone->receiveCall();

        cout<<"会震动！"<<endl;

    }

};

class ComplexPhone:public PhoneDecorator{

public:

    ComplexPhone(Phone *p):PhoneDecorator(p){}

    void receiveCall()

    {

        phone->receiveCall();

        cout<<"会发光！"<<endl;

    }

};

int main()

{

    Phone *p1=new SimplePhone();

    p1->receiveCall();

    cout<<"Jarphone"<<endl;

    Phone *p2=new JarPhone(p1);

    p2->receiveCall();

    cout<<"ComplexPhone"<<endl;

    Phone *p3=new ComplexPhone(p2);

    p3->receiveCall();

    return 0;

}

运行结果：

巴特西

Java/C++实现装饰模式---模拟手机功能的升级过程

用装饰模式模拟手机功能的升级过程：简单的手机(SimplePhone)在接收来电时，会发出声音提醒主人；而JarPhone除了声音还能振动；更高级的手机(ComplexPhone)除了声音、振动外，还有灯光闪烁提示。

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