移动架构--8.责任链模式

责任链模式

//1.抽象的处理方法
public interface IHandler{
  void handlerDo(Request req);//进行具体的处理
}
//2.具体的请求类
public class Request{
  private int level;
  private String content;
  public Request(int level,String content){
    this.level = level;
    this.content = content;
  }
  public int getRequestLevel(){
  return this.level;
  }
  public String getRequestContent(){
  return this.content;
  }
}
//3.具体的处理类
public Handler implement IHandler{
  private IHandler next = null;
  private int level;
  
  public Handler(int level){
    this.level = level;
  }
  public void setNext(IHandler next){
    this.next = next;
  }
  //具体的对请求的处理
  public void handlerDo(Request request){
     if(this.level==request.getRequestLevel()){
         System.out.println("等级为"+level+
          "的处理者处理了等级为"
          +getRequestLevel(request)+
          "的请求，请求内容为"+
           request.getRequestContent());
     }else{
      if(next!=null){
        next.handlerDo(request);
       }else{
        System.out.println("系统没有找到合适的处理者");
       }
     }
  }
}
//4.具体的调用内
public class Client{
  public static void main(String[] args){
    Request request = new Request(2,"请领导批准两万块钱的费用");
    Handler handler1= new Handler(1);
    Handler handler2= new Handler(2);
    Handler handler3= new Handler(3);
    handler1.setNext(handler2);
    handler2.setNext(handler3);
    handler3.setNext(null);
    handler1.handlerDo(request);
  }
}