Problem with an Out Put Stream Writer

Question

I want to open an URL so I use the following code inside a try bolc
URL recup = new URL("http://www.sun.com");
getAppletContext().showDocument(recup,"_blank");but once I add the following line of code
writer = new OutputStreamWriter(conn.getOutputStream Ican't open the URL mentioened above
that means the following code doesn't work
writer = new OutputStreamWriter(conn.getOutputStreamURL recup = new URL("http://www.sun.com");
getAppletContext().showDocument(recup,"_blank");
conn is a connexion that I establish before
that is just a piece of my code

Answer 1

Your post is not correct,
Ask yourselve the following questions:
1. does accint.dll support POST data or only GET?
2. does accint.dll need a cookie (session)?
3. what do you want to post?
4. does it need authentication
what does this give you, it will read the response if there is any:
import java.io.*;
import java.applet.*;
import java.net.*;
public class test extends Applet implements Runnable {
     public static void main(String[] args) {
          new test();
     public test() {
          new Thread(this).start();
     public void init() {
          System.out.println("this is init");
     public void run() {
          try {
               SendPostRequest();
          } catch (Exception e) {
               e.printStackTrace();
     public void SendPostRequest() {
          URL url = null;
          URLConnection conn = null;
          OutputStream writer = null;
          try {
               // set value for provenance
               StringBuffer b = new StringBuffer();
               b.append(URLEncoder.encode("provenance","UTF-8"));
               b.append("=");
               b.append(URLEncoder.encode("CTLIDT", "UTF-8"));
               // set value for environnement
               b.append("&");
               b.append(URLEncoder.encode("environnement", "UTF-8"));
               b.append("=");
               b.append(URLEncoder.encode("expsv", "UTF-8"));
               // where is your & here, what value are you setting here????
               b.append("=");
               b.append(URLEncoder.encode("0", "UTF-8"));
               // set value for CODLANG
               b.append("&");
               b.append(URLEncoder.encode("CODLANG", "UTF-8"));
               b.append("=");
               b.append(URLEncoder.encode("0", "UTF-8"));
               // set value for password
               b.append("&");
               b.append(URLEncoder.encode("password", "UTF-8"));
               b.append("=");
               b.append(URLEncoder.encode("AAAAA", "UTF-8"));
               // set value for nom
               b.append("&");
               b.append(URLEncoder.encode("nom", "UTF-8"));
               b.append("=");
               b.append(URLEncoder.encode("XYBI5400", "UTF-8"));
               url = new URL(
               "http://portail-sav2000.francetelecom.fr/binaccdi/accint.dll");
               conn = url.openConnection();
               conn.setDoOutput(true);
               conn.setDoInput(true);
               //Send request
               writer = conn.getOutputStream();
               writer.write(b.toString().getBytes("UTF-8"));
               writer.flush();
               writer.close();
               // the probleme is here I can't open the " francetelecom" page in
               // the browser
               //this is independent from the connection above
               // I mentione that no problem happens during the compiltaion and
               // no exception throwed during the execution
               System.out.println(readResponse(conn));
          } catch (Exception e) {
               e.printStackTrace();
     public String readResponse(URLConnection urlc) {
          // it is VERRY importaint to read the entire response
          // if you want to connect to the same server again
          // this is because closing the inputstream does not close the socket
          // and response data from a previous request could be mixed up with the
          // current
          InputStream is;
          byte[] buf = new byte[1024];
          String returnValue = "";
          try {
               is = urlc.getInputStream();
               int len = 0;
               ByteArrayOutputStream bos = new ByteArrayOutputStream();
               while ((len = is.read(buf)) > 0) {
                    bos.write(buf, 0, len);
               // close the inputstream
               is.close();
               returnValue = new String(bos.toByteArray());
          } catch (IOException e) {
               try {
                    // now failing to read the inputstream does not mean the server
                    // did not send
                    // any data, here is how you can read that data, this is needed
                    // for the same
                    // reason mentioned above.
                    e.printStackTrace();
                    System.out
                              .println(((HttpURLConnection) urlc).getResponseCode());
                    InputStream es = ((HttpURLConnection) urlc).getErrorStream();
                    int ret = 0;
                    // read the response body
                    while ((ret = es.read(buf)) > 0) {}
                    // close the errorstream
                    es.close();
               } catch (IOException ex) {
                    // deal with the exception
          return returnValue;
}