Hi
I'm writing a class which tries to access to an https web page which
has an user/password and a certificate. I need to access to this page
programmaticaly because I have to post some data looping a set of data.
The probelm is that I receive an error and my code doesn't work. My
question is: If I haven't the certificate installed on my PC, Can I
access to this page with my class? And if this is possible, who can
help me? :) Thank you in advance.

/**
*
*/
package mypackage;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.Authenticator;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.net.URLStreamHandlerFactory;
import java.security.KeyStore;
import java.security.Security;
import java.util.Properties;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;

/**
* @author me
*
*/
public class PostQuery {

    /**
    *
    */
    public PostQuery() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
    * @param args
    */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        PostQuery postQuery = new PostQuery();
        URL url;
        try {
            url = new URL("https://user:password@www.myaddresspage");

            try {
                postQuery.getResponse(url, "mydata");
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    public String getResponse (URL _url, String _request)throws
Exception{
        HttpsURLConnection c = null;
         InputStream is = null;
         OutputStream os = null;
         // b is to collect the repsonse from the server
         StringBuffer b = new StringBuffer( );

           // Create a trust manager that does not validate certificate
chains
           TrustManager[] trustAllCerts = new TrustManager[]{
               new X509TrustManager() {
                   public java.security.cert.X509Certificate[]
getAcceptedIssuers() {
                       return null;
                   }
                   public void checkClientTrusted(
                       java.security.cert.X509Certificate[] certs, String
authType) {
                   }
                   public void checkServerTrusted(
                       java.security.cert.X509Certificate[] certs, String
authType) {
                   }
               }
           };

           // Install the all-trusting trust manager
           try {
               SSLContext sc = SSLContext.getInstance("SSL");
               sc.init(null, trustAllCerts, new
java.security.SecureRandom());

HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
           } catch (Exception e) {
           }

         // open the connection
          c = (HttpsURLConnection)_url.openConnection();
           c.setDoOutput(true);
           c.setDoInput(true);
           //  set the method (i.e. GET or POST)
           c.setRequestMethod("POST");

           // get the output stream - this is for writing the post data to
           os = c.getOutputStream();
           // write the data
           os.write(_request.getBytes());

           os.flush();
           os.close();
           // Get HTTP response
           is = c.getInputStream( );
           System.out.println("Response code = "+ c.getResponseCode());
           int ch;
           while ((ch = is.read( )) != -1){
             b.append((char) ch);
           }
           is.close();
           c.disconnect();
           // b contains the data returned from the server
           return(b.toString());
    }
}

I receive "Server returned HTTP response code: 401"

Bye
Alessandro