HttpURLConnection的请求如何穿过 登录的session的Filter呢？

Question

  String urlString = "http://localhost:8080/FileUpload/requestupload.do";  try {
   // ------------------ CLIENT REQUEST   FileInputStream fileInputStream = new FileInputStream(new File(
     exsistingFileName));   URL url = new URL(urlString);   conn = (HttpURLConnection) url.openConnection();   conn.setDoInput(true);   conn.setDoOutput(true);   conn.setUseCaches(false);   conn.setRequestMethod("POST");   conn.setRequestProperty("Connection", "Keep-Alive");   conn.setRequestProperty("Content-Type",
     "multipart/form-data;boundary=" + boundary);
用网页的 applet 上传时候  session 过滤器会过滤掉这个上传的请求Filter就是一个普通的登录过滤器    HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpSession session = request.getSession();
Object object = session.getAttribute("admin");
如何使  HttpURLConnection 请求时携带有session 对象  或者 使得 Filter 不过滤掉这个请求呢？