How to use Google QPX API with Java to find flights?

Question

I am trying to create simple Java code that gets flight options using the Google QPX API for a flight from New York to London. I registered with Google and got API_key.

I read the documentation, but unfortunately I could not find a single example showing how to do this.

Here is what I have tried so far:

import com.google.api.services.qpxExpress.model.*; import java.util.*; public class Main { public static void main(String[] args) { // Passengers PassengerCounts passengers = new PassengerCounts(); passengers.setAdultCount(2); // Slice List<SliceInput> slices = new ArrayList<SliceInput>(); SliceInput slice = new SliceInput(); slice.setOrigin("JFK"); // John Kennedy Airport in Ney York slice.setDestination("LHR"); // London Heathrow slice.setDate("2015-07-01"); slices.add(slice); // Options request TripOptionsRequest tripOptions = new TripOptionsRequest(); tripOptions.setPassengers(passengers); tripOptions.setSlice(slices); // Search request TripsSearchRequest tripSearchReq = new TripsSearchRequest(); tripSearchReq.setRequest(tripOptions); // Next steps? // Setting up QPXExpress? } } 

I would appreciate it if someone could help me fill out the code. Thanks in advance.

Answer 1

This is simple code, successfully tested, hope it helps

 package com.airline.api; import java.io.IOException; import java.util.*; import javax.swing.text.View; import com.google.api.client.auth.oauth2.Credential; import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport; import com.google.api.client.http.HttpRequestInitializer; import com.google.api.client.http.HttpTransport; import com.google.api.client.json.JsonFactory; import com.google.api.client.json.jackson2.JacksonFactory; import com.google.api.services.qpxExpress.QPXExpressRequestInitializer; import com.google.api.services.qpxExpress.QPXExpress; import com.google.api.services.qpxExpress.model.FlightInfo; import com.google.api.services.qpxExpress.model.LegInfo; import com.google.api.services.qpxExpress.model.PassengerCounts; import com.google.api.services.qpxExpress.model.PricingInfo; import com.google.api.services.qpxExpress.model.SegmentInfo; import com.google.api.services.qpxExpress.model.SliceInfo; import com.google.api.services.qpxExpress.model.TripOption; import com.google.api.services.qpxExpress.model.TripOptionsRequest; import com.google.api.services.qpxExpress.model.TripsSearchRequest; import com.google.api.services.qpxExpress.model.SliceInput; import com.google.api.services.qpxExpress.model.TripsSearchResponse; public class AirlineReservation { /** * @param args */ private static final String APPLICATION_NAME = "MyFlightApplication"; private static final String API_KEY = "AIzaSyDnBCdsmTnrL5XFrO2TjJyvFioswjakNYU"; /** Global instance of the HTTP transport. */ private static HttpTransport httpTransport; /** Global instance of the JSON factory. */ private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance(); public static void main(String[] args) { // TODO Auto-generated method stub try { httpTransport = GoogleNetHttpTransport.newTrustedTransport(); PassengerCounts passengers= new PassengerCounts(); passengers.setAdultCount(1); List<SliceInput> slices = new ArrayList<SliceInput>(); SliceInput slice = new SliceInput(); slice.setOrigin("NYC"); slice.setDestination("LGA"); slice.setDate("2015-04-29"); slices.add(slice); TripOptionsRequest request= new TripOptionsRequest(); request.setSolutions(10); request.setPassengers(passengers); request.setSlice(slices); TripsSearchRequest parameters = new TripsSearchRequest(); parameters.setRequest(request); QPXExpress qpXExpress= new QPXExpress.Builder(httpTransport, JSON_FACTORY, null).setApplicationName(APPLICATION_NAME) .setGoogleClientRequestInitializer(new QPXExpressRequestInitializer(API_KEY)).build(); TripsSearchResponse list= qpXExpress.trips().search(parameters).execute(); List<TripOption> tripResults=list.getTrips().getTripOption(); String id; for(int i=0; i<tripResults.size(); i++){ //Trip Option ID id= tripResults.get(i).getId(); System.out.println("id "+id); //Slice List<SliceInfo> sliceInfo= tripResults.get(i).getSlice(); for(int j=0; j<sliceInfo.size(); j++){ int duration= sliceInfo.get(j).getDuration(); System.out.println("duration "+duration); List<SegmentInfo> segInfo= sliceInfo.get(j).getSegment(); for(int k=0; k<segInfo.size(); k++){ String bookingCode= segInfo.get(k).getBookingCode(); System.out.println("bookingCode "+bookingCode); FlightInfo flightInfo=segInfo.get(k).getFlight(); String flightNum= flightInfo.getNumber(); System.out.println("flightNum "+flightNum); String flightCarrier= flightInfo.getCarrier(); System.out.println("flightCarrier "+flightCarrier); List<LegInfo> leg=segInfo.get(k).getLeg(); for(int l=0; l<leg.size(); l++){ String aircraft= leg.get(l).getAircraft(); System.out.println("aircraft "+aircraft); String arrivalTime= leg.get(l).getArrivalTime(); System.out.println("arrivalTime "+arrivalTime); String departTime=leg.get(l).getDepartureTime(); System.out.println("departTime "+departTime); String dest=leg.get(l).getDestination(); System.out.println("Destination "+dest); String destTer= leg.get(l).getDestinationTerminal(); System.out.println("DestTer "+destTer); String origin=leg.get(l).getOrigin(); System.out.println("origun "+origin); String originTer=leg.get(l).getOriginTerminal(); System.out.println("OriginTer "+originTer); int durationLeg= leg.get(l).getDuration(); System.out.println("durationleg "+durationLeg); int mil= leg.get(l).getMileage(); System.out.println("Milleage "+mil); } } } //Pricing List<PricingInfo> priceInfo= tripResults.get(i).getPricing(); for(int p=0; p<priceInfo.size(); p++){ String price= priceInfo.get(p).getSaleTotal(); System.out.println("Price "+price); } } return; } catch (IOException e) { System.err.println(e.getMessage()); } catch (Throwable t) { t.printStackTrace(); } System.exit(1); } }