设计模式--结构型--装饰模式

装饰模式decorator：动态的给一个对象增加额外的功能，

package com.decorator;

public interface Person {
	public void eat();
}

package com.decorator;

public class Man implements Person{

	@Override
	public void eat() {
		// TODO Auto-generated method stub
		System.out.println("吃");
	}

}

package com.decorator;

public abstract class decorator implements Person {

	private Person person;

	public void setPerson(Person person) {
		this.person = person;
	}

	public void eat() {
		this.person.eat();
	}
}

package com.decorator;

public class Mandecorator extends decorator{
	
	public void eat(){
		super.eat();
		this.go();
	}
	
	public void go(){
		System.out.println("一边走着");
	}
}

package com.decorator;

public class Test {
	public static void main(String[] args) {
		Man m = new Man();
		
		m.eat();
		
		Mandecorator  md = new Mandecorator();
		md.setPerson(new Man());
		
		md.eat();
		
	}
}

输出结果


吃
吃
一边走着