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How to use HttpURLConnection POST data to web server?

public static String excutePost(String targetURL, String urlParameters)
  {
    URL url;
    HttpURLConnection connection = null; 
    try {
      //Create connection
      url = new URL(targetURL);
      connection = (HttpURLConnection)url.openConnection();
      connection.setRequestMethod("POST");
      connection.setRequestProperty("Content-Type",
           "application/x-www-form-urlencoded");

      connection.setRequestProperty("Content-Length", "" +
               Integer.toString(urlParameters.getBytes().length));
      connection.setRequestProperty("Content-Language", "en-US"); 

      connection.setUseCaches (false);
      connection.setDoInput(true);
      connection.setDoOutput(true);

      //Send request
      DataOutputStream wr = new DataOutputStream (
                  connection.getOutputStream ());
      wr.writeBytes (urlParameters);
      wr.flush ();
      wr.close ();

      //Get Response
      InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
      String line;
      StringBuffer response = new StringBuffer();
      while((line = rd.readLine()) != null) {
        response.append(line);
        response.append('\r');
      }
      rd.close();
      return response.toString();

    } catch (Exception e) {

      e.printStackTrace();
      return null;

    } finally {

      if(connection != null) {
        connection.disconnect();
      }
    }
  }
  ...
The urlParameters is a URL encoded string.
 String urlParameters =
        "fName=" + URLEncoder.encode("???", "UTF-8") +
        "&lName=" + URLEncoder.encode("???", "UTF-8")

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Comments

  1. Dom CasasJune 24, 2010 at 9:39 AM

    Hi there, thank you for your post. I was browsing around the web trying to learn java and I came across your site.

    ReplyDelete

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