java-threading-http-post.java

public class ThreadingPost {
    
    private static final String POST_PARAMS = "TransactionType=SALE&PymtMethod=DD&ServiceID=POS&PaymentID=2d3d2287a9a4680518aa&OrderNumber=2d3d2287a9a4680518aa&Amount=300.00&CurrencyCode=MYR&HashValue=63c82ee2e64b093f73bfa42c1fe0a294fccc2506e7dcabfd4ad30abdece88148&HashValue2=9b50229fbf3d44f5bbc4002986e1dbef28339c9b1f61e155b00effc8f5d45213&TxnID=POS2d3d2287a9a4680518aa&IssuingBank=FPXDB2B&TxnStatus=0&AuthCode=123456&BankRefNo=1912080120490928&RespTime=2019-12-18 20:20:00&TxnMessage=Transaction Successfull";
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException{
        
        for(int i=0; i <= 2; i++) {
            
            new Thread(() -> {
                try {
                    sendPOST();
                } catch (IOException ex) {
                    Logger.getLogger(ThreadingPost.class.getName()).log(Level.SEVERE, null, ex);
                }
            }).start();
        }
    }
    
    private static void sendPOST() throws IOException {
        String POST_URL = "http://94.237.66.140/api/v1.0/update-payment-transaction";
        URL obj = new URL(POST_URL);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        con.setRequestMethod("POST");

        // For POST only - START
        con.setDoOutput(true);
        OutputStream os = con.getOutputStream();
        os.write(POST_PARAMS.getBytes());
        os.flush();
        os.close();
        // For POST only - END

        int responseCode = con.getResponseCode();
        System.out.println("POST Response Code :: " + responseCode);

        if (responseCode == HttpURLConnection.HTTP_OK) { //success
                BufferedReader in = new BufferedReader(new InputStreamReader(
                                con.getInputStream()));
                String inputLine;
                StringBuffer response = new StringBuffer();

                while ((inputLine = in.readLine()) != null) {
                        response.append(inputLine);
                }
                in.close();

                // print result
                System.out.println(response.toString());
        } else {
                System.out.println("POST request not worked \n");
        }
    }
}