Create Spreadsheet using Google Spreadsheet API in Google drive in Java

Question

I had created some tool which was populating the google spreadsheet. It was working fine for 1 year, since today I've error

Exception in thread "main" com.google.gdata.util.AuthenticationException: Error authenticating (check service name)
at com.google.gdata.client.GoogleAuthTokenFactory.getAuthException(GoogleAuthTokenFactory.java:688)
at com.google.gdata.client.GoogleAuthTokenFactory.getAuthToken(GoogleAuthTokenFactory.java:560)
at com.google.gdata.client.GoogleAuthTokenFactory.setUserCredentials(GoogleAuthTokenFactory.java:397)
at com.google.gdata.client.GoogleService.setUserCredentials(GoogleService.java:364)
at com.google.gdata.client.GoogleService.setUserCredentials(GoogleService.java:319)
at com.google.gdata.client.GoogleService.setUserCredentials(GoogleService.java:303)

This is the part of code to connect with gmail:

String USERNAME = "usename@........com"; ->of course I'm using proper username and password
    String PASSWORD = "*******";
    SpreadsheetService service
            = new SpreadsheetService("SandboxCheck");
    service.setUserCredentials(USERNAME, PASSWORD);

I don't know how to connect with gmail, I was trying to do this via oAuth but I don't know how to do this. In examples on https://developers.google.com/google-apps/spreadsheets/authorize there is only code for .net.

Answer 1

I finally with help from here managed to create such connection. Everything is working as before. Steps You have to do is:

1. Register at https://console.developers.google.com
2. Create new project
3. Under APIs & Auth -> Credential -> Create New Client ID for Service Account
4. When the Client ID is generated You have to generate P12 key.
5. Client id will be needed in code below, Email addres is the addres You have to share Your spreadsheet

Below is the working code

import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.jackson.JacksonFactory;
import com.google.gdata.client.spreadsheet.SpreadsheetService;
import com.google.gdata.data.spreadsheet.SpreadsheetEntry;
import com.google.gdata.data.spreadsheet.SpreadsheetFeed;
import com.google.gdata.util.ServiceException;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import java.util.List;
public class OAuthIntegration{
    public static void main(String[] args) throws MalformedURLException, GeneralSecurityException, IOException, ServiceException {
        URL SPREADSHEET_FEED_URL;
        SPREADSHEET_FEED_URL = new URL("https://spreadsheets.google.com/feeds/spreadsheets/private/full");

        File p12 = new File("./key.p12");

        HttpTransport httpTransport = new NetHttpTransport();
        JacksonFactory jsonFactory = new JacksonFactory();
        String[] SCOPESArray = {"https://spreadsheets.google.com/feeds", "https://spreadsheets.google.com/feeds/spreadsheets/private/full", "https://docs.google.com/feeds"};
        final List SCOPES = Arrays.asList(SCOPESArray);
        GoogleCredential credential = new GoogleCredential.Builder()
                .setTransport(httpTransport)
                .setJsonFactory(jsonFactory)
                .setServiceAccountId("cliend_ID")
                .setServiceAccountScopes(SCOPES)
                .setServiceAccountPrivateKeyFromP12File(p12)
                .build();

        SpreadsheetService service = new SpreadsheetService("Test");

        service.setOAuth2Credentials(credential);
        SpreadsheetFeed feed = service.getFeed(SPREADSHEET_FEED_URL, SpreadsheetFeed.class);
        List<SpreadsheetEntry> spreadsheets = feed.getEntries();

        if (spreadsheets.size() == 0) {
            System.out.println("No spreadsheets found.");
        }

         SpreadsheetEntry spreadsheet = null;
        for (int i = 0; i < spreadsheets.size(); i++) {
            if (spreadsheets.get(i).getTitle().getPlainText().startsWith("ListOfSandboxes")) {
                spreadsheet = spreadsheets.get(i);
                System.out.println("Name of editing spreadsheet: " + spreadsheets.get(i).getTitle().getPlainText());
                System.out.println("ID of SpreadSheet: " + i);
            }
        }

    }

}

I hope this will help with issues I've faced. This is the list of jar I've used:

guava-11.0.2.jar
gdata-spreadsheet-3.0.jar
gdata-maps-2.0.jar
gdata-core-1.0.jar
jackson-core-asl-1.9.11.jar
jackson-core-2.1.3.jar
google-oauth-client-1.20.0.jar
google-http-client-jackson2-1.20.0.jar
google-http-client-jackson-1.20.0.jar
google-http-client-1.20.0.jar
google-api-client-1.20.0.jar