【设计模式】装修模式

public class Test {

	public static void main(String[] args) throws Exception {
		ICompont compont = new DecoratorBody();
		compont = new PacketDecorator1(compont);
		compont = new PacketDecorator2(compont);
		compont.handleContent();
	}
}

// 装修模式
interface ICompont {
	public void handleContent();
}

class DecoratorBody implements ICompont {

	@Override
	public void handleContent() {
		System.out.println(this.getClass().getName());
	}
}

abstract class Packet implements ICompont {
	ICompont compont;

	public Packet(ICompont compont) {
		this.compont = compont;
	}
}

class PacketDecorator1 extends Packet {

	public PacketDecorator1(ICompont compont) {
		super(compont);
	}

	@Override
	public void handleContent() {
		compont.handleContent();
		System.out.println(this.getClass().getName());
	}
}

class PacketDecorator2 extends Packet {

	public PacketDecorator2(ICompont compont) {
		super(compont);
	}

	@Override
	public void handleContent() {
		compont.handleContent();
		System.out.println(this.getClass().getName());
	}
}

输出

com.jsoup.DecoratorBody
com.jsoup.PacketDecorator1
com.jsoup.PacketDecorator2

目的和意义：装饰模式是在不必改变原类文件和使用继承的情况下，动态的扩展一个对象的功能。