装饰模式为已有类动态附加额外的功能就像LOL、王者荣耀等类Dota游戏中，英雄升级一样。每次英雄升级都会附加一个额外技能点学习技能。具体的英雄就是ConcreteComponent，技能栏就是装饰器Decorator，每个技能就是ConcreteDecorator；
//Component 英雄接口
public interface Hero {
//学习技能
void learnSkills();
}
//ConcreteComponent 具体英雄盲僧
public class BlindMonk implements Hero {
private String name;
public BlindMonk(String name) {
this.name = name;
}
@Override
public void learnSkills() {
System.out.println(name + "学习了以上技能！");
}
}
//Decorator 技能栏
public class Skills implements Hero{
//持有一个英雄对象接口
private Hero hero;
public Skills(Hero hero) {
this.hero = hero;
}
@Override
public void learnSkills() {
if(hero != null)
hero.learnSkills();
}
}
//ConreteDecorator 技能：Q
public class Skill_Q extends Skills{
private String skillName;
public Skill_Q(Hero hero,String skillName) {
super(hero);
this.skillName = skillName;
}
@Override
public void learnSkills() {
System.out.println("学习了技能Q:" +skillName);
super.learnSkills();
}
}
//ConreteDecorator 技能：W
public class Skill_W extends Skills{
private String skillName;
public Skill_W(Hero hero,String skillName) {
super(hero);
this.skillName = skillName;
}
@Override
public void learnSkills() {
System.out.println("学习了技能W:" + skillName);
super.learnSkills();
}
}
//ConreteDecorator 技能：E
public class Skill_E extends Skills{
private String skillName;
public Skill_E(Hero hero,String skillName) {
super(hero);
this.skillName = skillName;
}
@Override
public void learnSkills() {
System.out.println("学习了技能E:"+skillName);
super.learnSkills();
}
}
//ConreteDecorator 技能：R
public class Skill_R extends Skills{
private String skillName;
public Skill_R(Hero hero,String skillName) {
super(hero);
this.skillName = skillName;
}
@Override
public void learnSkills() {
System.out.println("学习了技能R:" +skillName );
super.learnSkills();
}
}
//客户端：召唤师
public class Player {
public static void main(String[] args) {
//选择英雄
Hero hero = new BlindMonk("李青");
Skills skills = new Skills(hero);
Skills r = new Skill_R(skills,"猛龙摆尾");
Skills e = new Skill_E(r,"天雷破/摧筋断骨");
Skills w = new Skill_W(e,"金钟罩/铁布衫");
Skills q = new Skill_Q(w,"天音波/回音击");
//学习技能
q.learnSkills();
}
}
输出：
学习了技能Q:天音波/回音击
学习了技能W:金钟罩/铁布衫
学习了技能E:天雷破/摧筋断骨
学习了技能R:猛龙摆尾
李青学习了以上技能！
