Java httpmessage计时器

Question

我试图使用httpmessage和计时器。我正在读取URL，在代码中插入横幅。我想运行一个计时器，如果用户已经足够长时间刷新页面并重新插入横幅。现在，我有一个用户访问该页面的位置，并且在他们浏览其他网站时没有再次显示该广告。如果刷新页面，它只会重新插入横幅。

 import java.net.*;
 import java.io.*;
 import org.apache.commons.lang.StringEscapeUtils;
 import java.util.*;
 import java.nio.charset.*;


// public static int var = 0;
// ---------------
 public static boolean runad = true;

 public void main(HttpMessage httpMessage){
 try{
    //var++;
    //Ignores if not html page
        if (!runad) return;
        runad = false;
        String currentUrl = httpMessage.getUrl(); //Gets the url

        //httpMessage.reply(currentUrl);
        URL cURL = new URL(currentUrl); //creates a connection
        URLConnection c = cURL.openConnection(); //connects to the url throws exception if access denied(e.g. futhead.com)
        String str = c.getContentType();        //Gets type of content html files return text/html css return text/css etc.
        if(str.indexOf("html") == -1) return; //if content type does not have html anywhere in it stop here
     //Get currrent page html
            URL url; //New URL
            InputStream is = null; //New input stream
            BufferedReader br; //New buffer reader
            String line; //Temp string to hold each html line
            String html = ""; //Final string to load all html code
            url = new URL(httpMessage.getUrl()); //Gets the current URL
            is = url.openStream();  // throws an IOException opens a new stream
            br = new BufferedReader(new InputStreamReader(is)); //Opens new buffer reader with new stream
            while ((line = br.readLine()) != null) { //reads each line in html and adds it to the ln string
                html = html + StringEscapeUtils.escapeHtml(line) + "\n";
            }

            html = StringEscapeUtils.unescapeHtml(html);

            /*************************Head link injection*******/
            StringBuilder bodyInsert = new StringBuilder();
            String inputLine;
            URL advert = new URL("advertisingurl");
            URLConnection ac = advert.openConnection();
            BufferedReader in = new BufferedReader(new InputStreamReader(
                    ac.getInputStream(), "UTF-8"));
            while ((inputLine = in.readLine()) != null)
                bodyInsert.append(inputLine+"\n");
            in.close();
            String styleImport = bodyInsert.toString();
            String jsImport = "";
            String jQueryImport = "";
            String bodyImport = "";
            String head; //The beginnnig of the file to right before the </head> tag
            String body; //</head> to right before the </body> tag
            String bEND; //</body> tag to the end of the file
            int hIndex = html.indexOf("</head");  //Index of </head
            int bIndex = html.indexOf("</body"); //Index of </body
            head = html.substring(0, hIndex);
            body = html.substring(hIndex, bIndex);
            bEND = html.substring(bIndex);

            body = body + bodyImport;


            head = head + styleImport + jsImport + jQueryImport;
            String newHTML = StringEscapeUtils.escapeHtml(head + body + bEND);
            newHTML = StringEscapeUtils.unescapeHtml(newHTML);
            /*************************Head link injection*******/

            httpMessage.reply(head + body + bEND);
            Test test = new Test();
            test.scheduleAtFixedRate(this, 0, 2000);

        }catch(Exception e)
        {
            report(10, "Error in test Script", e.getMessage());
        }
     httpMessage.abortProcessing();
 }

public class Test extends TimerTask {

   private int age;

   public Test() {
       Timer timer = new Timer();
       timer.scheduleAtFixedRate(this, 0, 2000);
   }

   /**
    * Implements TimerTask's abstract run method.
    */
    public void run(){
      //toy implementation
        runad = true;
    }

  public void main(String[] args) {
          new Test();
  }
}