本文共 2565 字，大约阅读时间需要 8 分钟。

memoto pattern是一种保存对象以前状态的一种行为模式，可以做undo redo等命令的储存者，也可以做打怪升级的复活储存，比较简单。 备忘录模式类图： [img]http://dl.iteye.com/upload/attachment/364902/5fe76af2-c6bc-345e-a349-1a95600715a3.jpg[/img] 说明:当然Enimy类可以注入BaseCondition,这里偷懒了，直接码上了。 具体代码示例： 人物基本属性

package memotoPattern; public class BaseCondition {
  	private int blood; 	public BaseCondition( int blood) {
  		this.blood= blood; 	} 	public void setBlood(int blood) {
  		this.blood = blood; 	} 	public int getBlood() {
  		return blood; 	} }

hero类：

package memotoPattern; public class Hero {
  	private BaseCondition baseCondition; 	private Memoto memoto; 	public void setBaseCondition(BaseCondition baseCondition) {
  		this.baseCondition = baseCondition; 	} 	public BaseCondition getBaseCondition() {
  		return baseCondition; 	} 	public void setMemoto(Memoto memoto) {
  		this.memoto = memoto; 	} 	public Memoto getMemoto() {
  		return memoto; 	} 	public BaseCondition denfend(){
  		baseCondition.setBlood(baseCondition.getBlood()-20); 		return baseCondition; 	} 	public void fight(Enimy enimy){
  		int enimyBlood = enimy.getBlood()-10; 		enimy.setBlood(enimyBlood); 		if(enimyBlood<0){
  			System.out.println("hero won"); 		} 	} 	public void recallHero(){
  		if(this.getBaseCondition().getBlood()<0){
  			System.out.println("hero return to fight"); 			this.setBaseCondition(memoto.getBaseCondition()); 		} 	} }

Enimy 类

package memotoPattern; public class Enimy {
  	private int blood; 	public void setBlood(int blood) {
  		this.blood = blood; 	} 	public int getBlood() {
  		return blood; 	} 	public void fight(Hero hero){
  		int heroBlood = hero.getBaseCondition().getBlood()-20; 		if(heroBlood<0){
  			System.out.println("hero died"); 		} 	} }

备忘录：

package memotoPattern; public class Memoto {
  	private BaseCondition baseCondition; 	public void setBaseCondition(BaseCondition baseCondition) {
  		this.baseCondition = baseCondition; 	} 	public BaseCondition getBaseCondition() {
  		return baseCondition; 	} }

测试类：

package memotoPattern; public class MemotoTest {
  	public static void main(String[]args){
  		BaseCondition baseCondition = new BaseCondition(100); 		Memoto memoto = new Memoto(); 		memoto.setBaseCondition(baseCondition); 		Hero hero = new Hero(); 		hero.setBaseCondition(baseCondition); 		hero.setMemoto(memoto); 		Enimy enimy = new Enimy(); 		enimy.setBlood(300); 		while(true){
  			if(hero.getBaseCondition().getBlood()<=0) 				hero.recallHero(); 			hero.fight(enimy); 			if(enimy.getBlood()<0) 				break; 			enimy.fight(hero); 			hero.denfend(); 		} 	} }

备注：当然可以做个备忘录链 可以根据选择确定恢复到哪个状态了。

转载地址：https://blog.csdn.net/iteye_2655/article/details/81970495 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！