import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Properties;

public class CallSmscApi {
    public CallSmscApi() {
    }

    /*
     * 1. Create a URL.
     * 2. Retrieve the URLConnection object.
     * 3. Set output capability on the URLConnection.
     * 4. Open a connection to the resource.
     * 5. Get an output stream from the connection.
     * 6. Write to the output stream.
     * 7. Close the output stream.
     */
    public static void main(String[] args) throws Exception {
        String postData = "";
        String retval = "";

        // API parameters
        String User = "User_Name";
        String passwd = "Password";
        String mobilenumber = "919XXXXXXXXX"; // Comma-separated for bulk
        String message = "Your SMS Message here";
        String sid = "Sender_Id";
        String mtype = "N"; // N for Normal, U for Unicode
        String DR = "Y";    // Y for Delivery Report

        postData += "User=" + URLEncoder.encode(User, "UTF-8")
                  + "&passwd=" + passwd
                  + "&mobilenumber=" + mobilenumber
                  + "&message=" + URLEncoder.encode(message, "UTF-8")
                  + "&sid=" + sid
                  + "&mtype=" + mtype
                  + "&DR=" + DR;

        URL url = new URL("http://smscountry.com/SMSCwebservice_Bulk.aspx");
        HttpURLConnection urlconnection = (HttpURLConnection) url.openConnection();

        // Optional: If behind a proxy server, uncomment below:
        // Properties sysProps = System.getProperties();
        // sysProps.put("proxySet", "true");
        // sysProps.put("proxyHost", "Proxy_IP");
        // sysProps.put("proxyPort", "Proxy_Port");

        urlconnection.setRequestMethod("POST");
        urlconnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        urlconnection.setDoOutput(true);

        OutputStreamWriter out = new OutputStreamWriter(urlconnection.getOutputStream());
        out.write(postData);
        out.close();

        BufferedReader in = new BufferedReader(new InputStreamReader(urlconnection.getInputStream()));
        String decodedString;
        while ((decodedString = in.readLine()) != null) {
            retval += decodedString;
        }
        in.close();

        System.out.println("API Response: " + retval);
    }
}