装饰者模式

package aaa;

public interface Human {
public void wearClothes();

public void walkToWhere();
}

//定义装饰者
public abstract class Decorator implements Human {
private Human human;

public Decorator(Human human) {
this.human = human;
}

public void wearClothes() {
human.wearClothes();
}

public void walkToWhere() {
human.walkToWhere();
}
}

//下面定义三种装饰，这是第一个，第二个第三个功能依次细化，即装饰者的功能越来越多
public class Decorator_zero extends Decorator {

public Decorator_zero(Human human) {
super(human);
}

public void goHome() {
System.out.println("进房子。。");
}

public void findMap() {
System.out.println("书房找找Map。。");
}

@Override
public void wearClothes() {
// TODO Auto-generated method stub
super.wearClothes();
goHome();
}

@Override
public void walkToWhere() {
// TODO Auto-generated method stub
super.walkToWhere();
findMap();
}
}

public class Decorator_first extends Decorator {

public Decorator_first(Human human) {
super(human);
}

public void goClothespress() {
System.out.println("去衣柜找找看。。");
}

public void findPlaceOnMap() {
System.out.println("在Map上找找。。");
}

@Override
public void wearClothes() {
// TODO Auto-generated method stub
super.wearClothes();
goClothespress();
}

@Override
public void walkToWhere() {
// TODO Auto-generated method stub
super.walkToWhere();
findPlaceOnMap();
}
}

public class Decorator_two extends Decorator {

public Decorator_two(Human human) {
super(human);
}

public void findClothes() {
System.out.println("找到一件D&G。。");
}

public void findTheTarget() {
System.out.println("在Map上找到神秘花园和城堡。。");
}

@Override
public void wearClothes() {
// TODO Auto-generated method stub
super.wearClothes();
findClothes();
}

@Override
public void walkToWhere() {
// TODO Auto-generated method stub
super.walkToWhere();
findTheTarget();
}
}

//定义被装饰者，被装饰者初始状态有些自己的装饰
public class Person implements Human {

@Override
public void wearClothes() {
// TODO Auto-generated method stub
System.out.println("穿什么呢。。");
}

@Override
public void walkToWhere() {
// TODO Auto-generated method stub
System.out.println("去哪里呢。。");
}
}
//测试类，看一下你就会发现，跟java的I/O操作有多么相似
public class Test {
public static void main(String[] args) {
Human person = new Person();
Decorator decorator = new Decorator_two(new Decorator_first(
new Decorator_zero(person)));
decorator.wearClothes();
decorator.walkToWhere();
}
}