Java

We will first import the "java.io", "java.util", "java.net" and "org.json" packages.

Next, we create a public class "LoginStaff".

Inside the public class, we will create a public static void, and declare all the input and output variables.

Then we create a try clause, and create both the header and content object.

Then, we will connect to the API serviceName, build the request parameters, send the request, and get the response object.

Then we will parse the Content, ServiceResponse, and ServiceRespHeader, and store the "GlobalErrorID", "ErrorText" and "ErrorDetails" in "globalErrorID", "errorText" and "errorDetails" respectively.

If the globalErrorID is '010041', it means that the OTP provided has expired. We will then display the errorText and errorDetails as well as a message 'OTP has expired, new OTP will be sent'.

If it is not '010000', we will display the ErrorText and the ErrorDetails.

Else, it means that there is no error, and we will display the result.

Entire Code:

// LoginStaff.java

import java.io.*;

import java.util.*;

import java.net.*;

import org.json.*;

public class LoginStaff {

public static void main(String args[]){

// api url

String apiServiceUrl = "http://tbankonline.com/SMUtBank_API/Gateway";

boolean verbose = true;

// response parameters

String globalErrorID;

String errorText;

String errorDetails;

String BIC;

String BankAddress;

String BankBranch;

String BankID;

String BankLogoLocation;

String BankName;

String BaseCurrency;

String Firstname;

String LastLoginTimestamp;

String Lastname;

String Usertype;

String username = "Alan"

String = "123456"

application = "Teller"

try {

// build header

JSONObject jo = new JSONObject();

jo.put("serviceName", "loginStaff");

jo.put("userID", ""); // not used

jo.put("PIN", ""); // not used

jo.put("OTP", ""); // not used

JSONObject headerObj = new JSONObject();

headerObj.put("Header", jo);

String header = headerObj.toString();

// build content

jo = new JSONObject();

jo.put("username", username);

jo.put("password", password);

jo.put("application", application);

JSONObject contentObj = new JSONObject();

contentObj.put("Content", jo);

String content = contentObj.toString();

// connect to API service

HttpURLConnection urlConnection = (HttpURLConnection) new URL(apiServiceUrl).openConnection();

urlConnection.setDoOutput(true);

urlConnection.setRequestMethod("POST");

// build request parameters

String parameters

= "Header="+header+"&"

+ "Content="+content+"&"

+ "ConsumerID=Teller"; // this API is for Teller only

// send request

BufferedWriter br = new BufferedWriter(new OutputStreamWriter(urlConnection.getOutputStream()));

br.write(parameters);

br.close();

// get response

String response = "";

Scanner s = new Scanner(urlConnection.getInputStream());

while (s.hasNextLine()){

response += s.nextLine();

}

s.close();

// get response object

boolean apiError;

JSONObject responseObj = new JSONObject(response);

responseObj = new JSONObject(response);

if (verbose)

{

System.out.println(responseObj.toString(4)); // indent 4 spaces

System.out.println();

}

// parse {"Content"}

contentObj = responseObj.getJSONObject("Content");

// parse {"ServiceResponse"}

JSONObject serviceRespObj = contentObj.getJSONObject("ServiceResponse");

// parse {"ServiceRespHeader"}

JSONObject serviceRespHeaderObj = serviceRespObj.getJSONObject("ServiceRespHeader");

globalErrorID = serviceRespHeaderObj.getString("GlobalErrorID");

errorText = serviceRespHeaderObj.getString("ErrorText");

errorDetails = serviceRespHeaderObj.getString("ErrorDetails");

if (verbose){

System.out.println("GlobalErrorID="+globalErrorID);

System.out.println("ErrorText="+errorText);

System.out.println("ErrorDetails="+errorDetails);

System.out.println();

}

if(globalErrorID.equals("010041"))

{

System.out.println(errorText);

System.out.println(errorDetails);

System.out.println("OTP expired, new OTP will be sent");

}

else if(!globalErrorID.equals("010000"))

{

System.out.println(errorText);

System.out.println(errorDetails);

}

else

{

JSONObject StaffLoginAuthenticateResponseObj = serviceRespObj.getJSONObject("Staff_Login_Authenticate-Response");

BIC = StaffLoginAuthenticateResponseObj.getString("BIC");

BankAddress = StaffLoginAuthenticateResponseObj.getString("BankAddress");

BankBranch = StaffLoginAuthenticateResponseObj.getString("BankBranch");

BankID = StaffLoginAuthenticateResponseObj.getString("BankID");

BankLogoLocation = StaffLoginAuthenticateResponseObj.getString("BankLogoLocation");

BankName = StaffLoginAuthenticateResponseObj.getString("BankName");

BaseCurrency = StaffLoginAuthenticateResponseObj.getString("BaseCurrency");

Firstname = StaffLoginAuthenticateResponseObj.getString("Firstname");

LastLoginTimestamp = StaffLoginAuthenticateResponseObj.getString("LastLoginTimestamp");

Lastname = StaffLoginAuthenticateResponseObj.getString("Lastname");

Usertype = StaffLoginAuthenticateResponseObj.getString("Usertype");

System.out.println("BIC="+BIC);

System.out.println("BankAddress="+BankAddress);

System.out.println("BankBranch="+BankBranch);

System.out.println("BankID="+BankID);

System.out.println("BankLogoLocation="+BankLogoLocation);

System.out.println("BankName="+BankName);

System.out.println("BaseCurrency="+BaseCurrency);

System.out.println("Firstname="+Firstname);

System.out.println("LastLoginTimestamp="+LastLoginTimestamp);

System.out.println("Lastname="+Lastname);

System.out.println("Usertype="+Usertype);

}

catch(Exception e)

{

e.printStackTrace(System.out);

}

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