定義一個代表被裝飾事物的接口：

public interface Coffee {public String getCoffer();public double getPrice(); }

最初的具體事物：

public class Starbucks implements Coffee {@Overridepublic String getCoffer() {return "星巴克";}@Overridepublic double getPrice() {return 10D;}}

被裝飾后的具體事物：

public class Seasoning implements Coffee {private Coffee coffee;public Seasoning(Coffee coffee) {this.coffee = coffee;}@Overridepublic String getCoffer() {return coffee.getCoffer();}@Overridepublic double getPrice() {return coffee.getPrice();} }

一號裝飾器：

public class SeasoningOne extends Seasoning implements Coffee {public SeasoningOne(Coffee coffee) {super(coffee);}@Overridepublic String getCoffer() {return super.getCoffer() + " 糖";}@Overridepublic double getPrice() {return super.getPrice() + 1.0D;}}

二號裝飾器：

public class SeasoningTwo extends Seasoning implements Coffee {public SeasoningTwo(Coffee coffee) {super(coffee);}@Overridepublic String getCoffer() {return super.getCoffer() + " 牛奶";}@Overridepublic double getPrice() {return super.getPrice() + 5.0D;} }

三號裝飾器：

public class SeasoningThree extends Seasoning implements Coffee {public SeasoningThree(Coffee coffee) {super(coffee);}@Overridepublic String getCoffer() {return super.getCoffer() + " 摩卡";}@Overridepublic double getPrice() {return super.getPrice() + 3.0D;} }

使用者：

public class Consumer {public static void main(String[] args) {Coffee coffee = new SeasoningOne(new Seasoning(new Starbucks()));System.out.println(coffee.getCoffer() + ":" + coffee.getPrice());coffee = new SeasoningTwo(new SeasoningOne(new Seasoning(new Starbucks())));System.out.println(coffee.getCoffer() + ":" + coffee.getPrice());coffee = new SeasoningThree(new SeasoningTwo(new SeasoningOne(new Seasoning(new Starbucks()))));System.out.println(coffee.getCoffer() + ":" + coffee.getPrice());} }

總結

以上是生活随笔為你收集整理的设计模式（二）之装饰器模式的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。