decorator装饰模式

动态的给一个对象添加一些额外的职责

示例代码:

/**

 * 工作接口

 * 

 * @time 下午11:25:59

 * @author retacn yue

 * @Email zhenhuayue@sina.com

 */

public interface Work {

public void insert();

}

/**

 * 插入方形桩

 * @time 下午11:29:08

 * @author  retacn yue

 * @Email  zhenhuayue@sina.com

 */

public class SquarePeg implements Work {

@Override

public void insert() {

System.out.println("方形桩插入");

}

}

/**

 * 装饰模式

 * 

 * @time 下午11:30:48

 * @author retacn yue

 * @Email zhenhuayue@sina.com

 */

@SuppressWarnings("rawtypes")

public class Decorator implements Work {

private Work work;

private ArrayList list = new ArrayList();

/**

* 构造器

*/

@SuppressWarnings("unchecked")

public Decorator(Work work) {

this.work = work;

list.add("挖坑");

list.add("钉木板");

}

@Override

public void insert() {

newMethod();

}

public void newMethod() {

otherMethod();

work.insert();

}

// 增加额外的功能

private void otherMethod() {

ListIterator iterator = list.listIterator();

while (iterator.hasNext()) {

System.out.println(((String) iterator.next()) + "正在进行");

}

}

}

/**

 * 测试装饰模式

 * 

 * @time 下午11:40:07

 * @author retacn yue

 * @Email zhenhuayue@sina.com

 */

public class TestDecorator {

public static void main(String[] args) {

Work squarePeg=new SquarePeg();

Work decorator=new Decorator(squarePeg);

decorator.insert();

}

}