package com.zhiru;/** 装饰器模式* 实现动态的为对象添加功能* 是从一个对象外部给一个对象添加功能。* 基于对象组合的方式给对象添加功能* 组成要素：Component,ConcreteComponent,Decorator,ConcreteDecorator1,ConcreteDecorator2,...*/
//http://blog.163.com/michael_yu/blog/static/173853371201010365749187///Component
//学生接口
abstract class Student {public abstract void student();
}// concretecomponent
// 具体的学生接口
class GoodStudent extends Student {@Overridepublic void student() {// TODO Auto-generated method stubSystem.out.println("good student");}}// Decorator
// 学生接口装饰器，对学生抽象类进行组合.
class DecoratorStudent extends Student {private Student stu;public DecoratorStudent(Student stu) {this.stu = stu;}@Overridepublic void student() {// TODO Auto-generated method stubstu.student();}}// ConcreteDecorator class
// 三好学生
class ThreeGoodStudent extends DecoratorStudent {public ThreeGoodStudent(Student stu) {super(stu);}public void student() {super.student();System.out.println("three good student");}
}// 乐于助人的学生
class WarmHeartStudent extends DecoratorStudent {public WarmHeartStudent(Student stu) {super(stu);// TODO Auto-generated constructor stub}public void student() {super.student();System.out.println("warm hearted student");}
}// 擅长编程的学生
class BeginningAbilityStudent extends DecoratorStudent {public BeginningAbilityStudent(Student stu) {super(stu);// TODO Auto-generated constructor stub}public void student() {super.student();System.out.println("be good at programming student");}
}public class DecoratorPattern {public static void main(String[] args) {// TODO Auto-generated method stub// 擅长编程的，三好好学生new BeginningAbilityStudent(new ThreeGoodStudent(new GoodStudent())).student();// 热心，善于编程，三好，好学生。new WarmHeartStudent(new BeginningAbilityStudent(new ThreeGoodStudent(new GoodStudent()))).student();}}
/** good student three good student be good at programming student * good student* three good student be good at programming student warm hearted student*/

参考博客：http://blog.163.com/michael_yu/blog/static/173853371201010365749187/