【备忘】责任链模式cor(chain of responsibility)

public abstract class Handler {      protected Handler successor;      protected String name;        public String getName() {          return name;      }        //处理请求，由子类完成       public abstract void handleRequest(String request);        //设置下一个处理请求的人       public void setNextHandler(Handler successor) {          this.successor = successor;      }  }  

??? ? ? 事实上，跟数据结构里的链表差不多。?? ? ? 然后每个继承Handle的类分别实现handleRequest方法。

public class HandleA extends Handle {public void handRequest(Request req){if(req.condition1){doSomething();}else{        successor.handleRequest();}}}

?? ? ? ??最后在main方法中对每个类的对象设置后继结点即可。Handle h1 = new HandleA();

Handle h2 = new HandleB();Handle h3 = new HandleC();h1.setNextHandler(h2);h2.setNextHandler(h3);String req = "XXXXXXX";h1.handleRequest(request);

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