public void test(int i, Request request){ 
  if(i==1){ 
    Handler1.response(request); 
  }else if(i == 2){ 
    Handler2.response(request); 
  }else if(i == 3){ 
    Handler3.response(request); 
  }else if(i == 4){ 
    Handler4.response(request); 
  }else{ 
    Handler5.response(request); 
  } 
}

class Level { 
    private int level = 0; 
    public Level(int level){ 
      this.level = level; 
    }; 
     
    public boolean above(Level level){ 
      if(this.level >= level.level){ 
        return true; 
      } 
      return false; 
    } 
  } 
   
  class Request { 
    Level level; 
    public Request(Level level){ 
      this.level = level; 
    } 
     
    public Level getLevel(){ 
      return level; 
    } 
  } 
   
  class Response { 
   
  } 
   
  abstract class Handler { 
    private Handler nextHandler;   
    public final Response handleRequest(Request request){ 
      Response response = null; 
       
      if(this.getHandlerLevel().above(request.getLevel())){ 
        response = this.response(request); 
      }else{ 
        if(this.nextHandler != null){ 
          this.nextHandler.handleRequest(request); 
        }else{ 
          System.out.println("-----沒(méi)有合適的處理器-----"); 
        } 
      } 
      return response; 
    } 
    public void setNextHandler(Handler handler){ 
      this.nextHandler = handler; 
    } 
    protected abstract Level getHandlerLevel(); 
    public abstract Response response(Request request); 
  } 
   
  class ConcreteHandler1 extends Handler { 
    protected Level getHandlerLevel() { 
      return new Level(1); 
    } 
    public Response response(Request request) { 
      System.out.println("-----請(qǐng)求由處理器1進(jìn)行處理-----"); 
      return null; 
    } 
  } 
   
  class ConcreteHandler2 extends Handler { 
    protected Level getHandlerLevel() { 
      return new Level(3); 
    } 
    public Response response(Request request) { 
      System.out.println("-----請(qǐng)求由處理器2進(jìn)行處理-----"); 
      return null; 
    } 
  } 
   
  class ConcreteHandler3 extends Handler { 
    protected Level getHandlerLevel() { 
      return new Level(5); 
    } 
    public Response response(Request request) { 
      System.out.println("-----請(qǐng)求由處理器3進(jìn)行處理-----"); 
      return null; 
    } 
  } 
   
  public class Client { 
    public static void main(String[] args){ 
      Handler handler1 = new ConcreteHandler1(); 
      Handler handler2 = new ConcreteHandler2(); 
      Handler handler3 = new ConcreteHandler3(); 
   
      handler1.setNextHandler(handler2); 
      handler2.setNextHandler(handler3); 
       
      Response response = handler1.handleRequest(new Request(new Level(4))); 
    } 
  }