http3

 /**
  * 调用dna的http接口
  *
  * @param url
  *            String,访问dna url地址
  * @return dna返回的处理结果
  *
  */
 protected static String sendAndRecieveData(HttpURLConnection httpCon) {
  // http连接
  HttpURLConnection con = httpCon;
  // 保存返回结果
  String recieveData = "";
  PrintWriter out = null;
  BufferedReader inBuff = null;
  try {
   // 获取写入流
   out = new PrintWriter(con.getOutputStream());
   out.flush();
   // 写入时用UTF-8编码
   inBuff = new BufferedReader(new InputStreamReader(con
     .getInputStream(), "UTF-8"));