裝飾器設計模式

• 例一：實現對聲音的的放大功能

• 源碼:

  package me.sgyz.study02;/***實現放大器對聲音的的放大功能* @ 洛塵曦**/public class DecorateTest01 {public static void main(String[] args) {Person p = new Person();p.say();//裝飾器Amplifier am =new Amplifier(p);am.say();} }interface Say{void say();}class Person implements Say{//屬性private int voice = 10;@Overridepublic void say() {System.out.println("人的聲音為"+this.getVoice());}public void setVoice(int voice) {this.voice = voice;}public int getVoice() {return voice;} }//放大器 class Amplifier implements Say{private Person p;Amplifier(Person p){this.p=p;}@Overridepublic void say() {System.out.println("人的聲音為"+p.getVoice()*100);System.out.println("噪音.............");}}

• 例二：模擬咖啡

  • 1、抽象組件
  • 2、具體組件
  • 3、抽象裝飾類
  • 4、裝飾類
  package me.sgyz.study02;/***模擬咖啡* 1.抽象組件* @ 洛塵曦**/public class DecorateTest02 {public static void main(String[] args) {Drink coffee = new Coffee();Drink suger = new Suger(coffee);System.out.println(suger.info()+"-->"+suger.cost());Drink milk = new Milk(coffee);System.out.println(milk.info()+"-->"+milk.cost());milk = new Milk(suger);System.out.println(milk.info()+"-->"+milk.cost());} }//抽象組件 interface Drink{double cost();//費用String info();//說明}//具體組件 class Coffee implements Drink{private String name = "原味咖啡";@Overridepublic double cost() {return 10;}@Overridepublic String info() {return name;} }//抽象裝飾類 abstract class Decroate implements Drink{private Drink drink;public Decroate(Drink drink){this.drink=drink;}@Overridepublic double cost() {return this.drink.cost();}@Overridepublic String info() {return this.drink.info();} }//具體裝飾類 class Milk extends Decroate{public Milk(Drink drink){super(drink);}@Overridepublic double cost() {return super.cost()*4;}@Overridepublic String info() {return super.info()+"加入了牛奶";} }//具體裝飾類 class Suger extends Decroate{public Suger(Drink drink){super(drink);}@Overridepublic double cost() {return super.cost()*2;}@Overridepublic String info() {return super.info()+"加入了蔗糖";} }

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