http://www.verejava.com/?id=16999090833167

package com.decorator.theory;

public class TestDecorator
{
    public static void main(String[] args)
    {
        Person p=new Man();
        p.show();
        
        p=new ManagerDecorator(p);
        p.show();
        
        p=new ActorDecorator(p);
        p.show();
        
    }
}





package com.decorator.theory;

public interface Person
{
    public void show();
}





package com.decorator.theory;

public class Man implements Person
{

    @Override
    public void show()
    {
        System.out.println("我是一个男人");
    }

}





package com.decorator.theory;

public class ManagerDecorator extends Decorator
{

    public ManagerDecorator(Person p)
    {
        super(p);
    }

    @Override
    public void show()
    {
        p.show();
        System.out.println("我还是一个经理");
        
    }

}





package com.decorator.theory;

public abstract class Decorator implements Person
{
    protected Person p;
    
    public Decorator(Person p)
    {
        this.p=p;
    }
}





package com.decorator.theory;

public class ActorDecorator extends Decorator
{

    public ActorDecorator(Person p)
    {
        super(p);
    }

    @Override
    public void show()
    {
        p.show();
        System.out.println("我还是国际演员");
        
    }

}

http://www.verejava.com/?id=16999090833167