Chain Of Responsibility(责任链模式)

public abstract class Base{

  //属性类型自定义
 protected Chain firChain;

 /**
  * chain操作

  */
 public abstract Object submit(Object obj);
}

public class BaseImpl extends Base{
 public BaseImpl () {
  super();

  // 初始化职责链
  firChain = new AChain();
  BChain bChain = new BChain();
  CChain cChain = new CChain();

  firChain.setNextChain(bChain );
  bChain .setNextChain(cChain );
 }

 public Result submit(Object obj) {
  Result result = new Result();
  firChain.sendToChain(obj, result );
  return result ;
 }
}

public abstract class Chain {

 protected Chain nextChain;// 下一个执行节点

 /**
  * 得到此节点的下一个执行节点
  *
  * @return
  */
 public Chain getNextChain() {
  return nextChain;
 }

 /**
  * 添加此节点的下一个执行节点
  *
  * @param c
  */
 public void setNextChain(Chain nextChain) {
  this.nextChain = nextChain;
 }

 /**
  * 执行内容
  */
 public abstract void sendToChain(Object obj,
   Result result);
}

public class AChain extends Chain {

 @Override
 public void sendToChain(Object obj, Result result) {

    //具体操作

   //最后

   if (nextChain != null)
    nextChain.sendToChain(obj, result);

 }

}

BChain CChain 类似写法