装饰着设计模式：

        功能：将主功能和附加功能相分离；

        好处：
                1> 使主功能和附加功能可以独立扩展；

                2> 降低主功能和附加功能之间的耦合性；

        举例：
                实现一个手机功能的接口：

package org.westos.pattern;

//规则
public interface Phone {
	
	//电话电话的功能
	public abstract void call() ;
}

package org.westos.pattern;

public abstract class PhoneDecoreate implements Phone {
	private Phone p ;
	
	public PhoneDecoreate(Phone p) {
		this.p = p ;
	}
	
	@Override
	public void call() {
		this.p.call();
	}

}

package org.westos.pattern;

public class RingPhoneDecorate extends PhoneDecoreate {

	public RingPhoneDecorate(Phone p) {
		super(p);
	}
	
	@Override
	public void call() {
		System.out.println("手机可以听彩铃了....");
		super.call();
	}

}

package org.westos.pattern;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStreamReader;
import java.util.Scanner;

import org.westos.MusicPhoneDecorate;

//测试类
public class PhoneDemo {
	
	public static void main(String[] args) throws FileNotFoundException {
		
		//创建Phone对象
		Phone p = new IPhone() ;
		p.call();
		System.out.println("-----------------");
		//需求:打电话之前,先听彩铃....
		PhoneDecoreate pd = new RingPhoneDecorate(p) ;
		pd.call();
		
		System.out.println("--------------------");
		
		//需求:打完电话之后,听音乐
		pd = new MusicPhoneDecorate(p) ;
		pd.call();
		
		System.out.println("---------------------");
		
		//需求:先听彩铃,打电话--->听音乐
		//装饰类
		pd = new RingPhoneDecorate(new MusicPhoneDecorate(p)) ;
		pd.call();
		
 	}
}