Unable to connect servlet on web server

Question

Hi all,
I have wrote the following program to connect to the servlet to the web server:
public class HTTPTest
     public HTTPTest() {
public static void main(String[] args) {
     HTTPTest httptest = new HTTPTest();
          httptest.sendHTTP();
public void sendHTTP() {          
          try
               URL url = new URL("http://myserver/myServlet");
               HttpURLConnection conn = (HttpURLConnection)url.openConnection();
               conn.setDoOutput(true);
               conn.setRequestMethod("POST");
               conn.setRequestProperty("Content-type", "application/x-www-form-urlencoded");
               PrintWriter dos = new PrintWriter (conn.getOutputStream ());
               dos.println("content=" + URLEncoder.encode("ABC"));
               dos.println("signature=" + URLEncoder.encode("CDE"));
               dos.flush();
               dos.close();
               conn.disconnect();
          catch(Exception e)
My servlet does contains some code that write log to the web server log. However, when I examine the log after running this program, nothing was written. But when I access my servlet using an HTML page, it works!
I am using iPlanet 4.0 SP4, JDK 1.3. Can anyone tell me why? thanks very much!
Walter

Answer 1

Thanks very much! It works.
However, another problem comes. For the two fields that I "POST"ed, it seems that one can reach the servlet but one cannot. When I retrieve the values from the servlet using "req.getParameter("XXX")", one of them got null. But obviously my applet does not send null values.
Any other thing is needed? Thanks!