Java.io.IOException: server returned HTTP: 400 response code for URL

Question

I am working on a java stream application that clicks on the URL to send sms messages the
problem is that I am behind the NTLM proxy server and I tried most of the day and tried many solutions, but did not manage to give the application a title error, and when I tried to print the error response, I found that its error page comes from a proxy server

this is the beat code

System.setProperty("java.net.useSystemProxies", "true");
                    System.setProperty("http.proxyHost", AUTH_PROXY");
                    System.setProperty("http.proxyPort", AUTH_PROXY_PORT);
                    System.setProperty("http.proxyUser", AUTH_USER);
                    System.setProperty("http.proxyPassword", AUTH_PASSWORD);

                    Authenticator.setDefault(
                              new Authenticator() {
                                public PasswordAuthentication getPasswordAuthentication() {
                                  return new PasswordAuthentication(AUTH_USER, AUTH_PASSWORD.toCharArray());
                                }
                              }
                            );

                     URL url = new URL(urlString);

                     HttpURLConnection httpConn =(HttpURLConnection)url.openConnection();
                     httpConn.setReadTimeout(10000);
                     String resp = getResponse(httpConn);
                     logger.info("urlString=" + urlString);
                     logger.info("Response=" + resp);

here i get respoonse

private String getResponse(HttpURLConnection Conn) throws IOException {


        InputStream is;
        if (Conn.getResponseCode() >= 400) {
            is = Conn.getErrorStream();
        } else {
            is = Conn.getInputStream();
        }


        String response = "";
        byte buff[] = new byte[512];
        int b = 0;
        while ((b = is.read(buff, 0, buff.length)) != -1) {
            response += new String(buff, 0, b);

        }
        is.close();

        return response;
    }

any help is appreciated thanks

Answer 1

, , 400, , - URL,

URLEncoder.encode(urlParameter,"UTF-8");

, ,