JSONRequesterWithParser.java Source code

Introduction

Here is the source code for JSONRequesterWithParser.java

Source

import java.io.BufferedReader;
import java.io.File;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Formatter;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONObject;

public class JSONRequesterWithParser {
    public String Call(String url) {
        StringBuffer response = new StringBuffer();
        try {
            URL obj = new URL(url);
            HttpURLConnection con = (HttpURLConnection) obj.openConnection();

            // optional default is GET
            con.setRequestMethod("GET");

            //add request header
            con.setRequestProperty("User-Agent", "Mozilla/5.0");

            int responseCode = con.getResponseCode();
            System.out.println("\nSending 'GET' request to URL : " + url);
            System.out.println("Response Code : " + responseCode);

            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String inputLine;

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

            }
            in.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return response.toString();
    }

    public void ParseAndSaveJSONResponse(String response) {
        try {
            JSONObject jsonData = new JSONObject(response);

            JSONObject rec = jsonData.getJSONObject("rec");
            //System.out.println(rec.toString());
            JSONObject veh = rec.getJSONObject("vehicles");
            //System.out.println(veh.toString());
            JSONArray vehicles = (JSONArray) veh.get("vehicles");
            //System.out.println(vehcles);

            System.out.println("No of vehicles data found :" + vehicles.length());
            List<String> vehicleList = new ArrayList<>();

            for (int item = 0; item < vehicles.length(); item++) {
                //properties for single vehicle
                JSONObject vehData = vehicles.getJSONObject(item);
                JSONObject position = vehData.getJSONObject("position");

                VehicleData vehicle = new VehicleData();
                Date currentDateTime = new Date();
                vehicle.dateTime = currentDateTime.toString();
                vehicle.address = position.getString("address");
                vehicle.latitude = position.getString("latitude");
                vehicle.longitude = position.getString("longitude");
                vehicle.carName = vehData.getString("carName");
                vehicle.licensePlate = vehData.getString("licensePlate");
                vehicle.group = vehData.getString("group");

                String filePath = FindFilePath(vehicle.address);
                Save(vehicle, filePath);

            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    private void Save(VehicleData vehicle, String filePath) {
        //print each vehicle information in file in tabular format
        try {
            //File file = new File("E:\\Projects\\Car2Go\\car1.txt"); // just for testing.
            //System.out.println("File Path"+filePath);
            File file = new File(filePath);
            FileWriter fw = null;
            if (!file.exists()) {
                file.createNewFile();
                fw = new FileWriter(file.getAbsoluteFile());
                String header = "Date Time" + "\t" + "Address" + "\t" + "Car Name" + "\t" + "License Plate" + "\t"
                        + "Group" + "\t" + "Latitude" + "\t" + "Longitude" + "\n";
                fw.write(header);
            } else {
                fw = new FileWriter(file.getAbsoluteFile(), true);
                String formatedVehicleData = vehicle.dateTime + "\t" + vehicle.address + "\t" + vehicle.carName
                        + "\t" + vehicle.licensePlate + "\t" + vehicle.group + "\t" + vehicle.latitude + "\t"
                        + vehicle.longitude + "\n";
                fw.write(formatedVehicleData);

            }
            fw.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    private String FindFilePath(String cityRef) {
        String[] cityName = cityRef.split(" ");
        Date date = new Date();
        SimpleDateFormat dateFormatter = new SimpleDateFormat("YYYY-MM-dd-HH-mm");
        String timeStamp = dateFormatter.format(date);
        //String filePath = "E:\\Projects\\Car2Go\\" + cityName[cityName.length - 1] + ".txt"; // last word of address would have city name but this is not the exact case with drive-now api.
        File fileDirectory = new File(System.getProperty("user.dir") + "\\DriveNowDocs\\Munich1");
        String filePath = fileDirectory + "\\Munich" + timeStamp + ".txt";
        System.out.println(filePath);
        if (!fileDirectory.exists()) {
            fileDirectory.mkdirs();
        }
        return filePath;
    }

}