回顾设计模式--装饰图案

装饰图案 如果没有改变的情况下现有的类，动态添加新功能。即插即用，开闭原则

public interface Man {		public void killMonster();}public class BatMan implements Man {		public String name;		public BatMan(String name) {		this.name = name;	}		@Override	public void killMonster() {				System.out.println("蝙蝠侠" + name + "開始打怪兽!");			}}public class XMan implements Man {	@Override	public void killMonster() {				System.out.println("X-Man 開始打怪兽!");			}}//Decorator 加入武器 进行油漆装饰public abstract class Weapon implements Man {		protected Man man;		public void setMan(Man man) {		this.man = man;	}		public Man getMan() {		return man;	}		@Override	public void killMonster() {		man.killMonster();	}	}public class Sword extends Weapon {		private String swordName;		public Sword(String swordName) {		this.swordName = swordName;	}		@Override	public void killMonster() {		System.out.println("获取一把剑。剑名：" + swordName);		super.killMonster();	}}public class Gun extends Weapon {		public String gunName;	private int bulletCount = 10;		public Gun(String gunName) {				this.gunName = gunName;	}		@Override	public void killMonster() {		System.out.println("发放武器 " + gunName + ",装有子弹" + bulletCount + "发！

"); super.killMonster(); } } public class GiveBullet extends Weapon { private int bulletCount; public GiveBullet(int bulletCount) { this.bulletCount = bulletCount; } @Override public void killMonster() { System.out.println("额外发放子弹" + bulletCount + "发！

"); super.killMonster(); } } public class DecoratorTest { public static void main(String[] args) { Man man = new BatMan("Wayne"); //Man man = new XMan(); //man.killMonster(); Weapon weapon = new Gun("AK"); //weapon.setMan(man); //weapon.killMonster(); Weapon bullet = new GiveBullet(100); Weapon sword = new Sword("莫邪"); //加入子弹 bullet.setMan(man); //加入gun weapon.setMan(bullet); //加入剑 sword.setMan(weapon); sword.killMonster(); } }

版权声明：本文博主原创文章。博客，未经同意不得转载。