IPerson：

/** * @author com.tiantian * @version 创建时间：2012-11-20 下午3:43:04 */public interface IPerson {    public void canDo();}

Person：

/** * @author com.tiantian * @version 创建时间：2012-11-20 下午3:44:04 */public class Person implements IPerson{    @Override    public void canDo() {        System.out.println("I can code");    }}

Decorator（所有Person装饰者的父类）：

/** * @author com.tiantian * @version 创建时间：2012-11-20 下午3:44:55 */public class Decorator implements IPerson{    private IPerson person;    public Decorator(IPerson person) {        this.person = person;    }    @Override    public void canDo() {        person.canDo();    }}

DecoratorSwim（Swim装饰--为Peron添加“Swim”功能）：

/** * @author com.tiantian * @version 创建时间：2012-11-20 下午3:48:54 */public class DecoratorSwim extends Decorator{    public DecoratorSwim(IPerson person) {        super(person);    }        @Override    public void canDo() {        super.canDo();        System.out.println("I also can swim");    }}

DecoratorDraw（Draw装饰--为Peron添加“Draw”功能）：

/** * @author com.tiantian * @version 创建时间：2012-11-20 下午3:47:29 */public class DecoratorDraw extends Decorator{    public DecoratorDraw(IPerson person) {        super(person);    }    @Override    public void canDo() {        super.canDo();        System.out.println("I also can draw");    }}

Test：

/** * @author com.tiantian * @version 创建时间：2012-11-20 下午3:49:35 */public class Test {    public static void main(String[] args) {
            Decorator decorator = new DecoratorDraw(new DecoratorSwim(new Person()));        decorator.canDo();    }}