Quick and Easy Integration of Google URL Shortener API in your Java Applications using Scribe-Java and GSon - http://codeoftheday.blogspot.com/2013/07/quick-and-easy-integration-of-google.html

Google_Url_Shortener_Api_Integration_Using_Scribe_And_Gson_Example.java

/**
 * Quick and Easy Integration of Google URL Shortener API in your Java Applications using Scribe-Java and GSon
 * http://codeoftheday.blogspot.com/2013/07/quick-and-easy-integration-of-google.html
 */
package smhumayun.codeoftheday.google.urlshortener;

import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;
import org.scribe.builder.ServiceBuilder;
import org.scribe.builder.api.GoogleApi;
import org.scribe.model.OAuthRequest;
import org.scribe.model.Response;
import org.scribe.model.Verb;
import org.scribe.oauth.OAuthService;

import java.lang.reflect.Type;
import java.util.Map;

/**
 * This class demonstrate quick and Easy Integration of Google URL Shortener API in your Java Applications 
 * using Scribe-Java and GSon APIs
 *
 * User: smhumayun
 * Date: 7/23/13
 * Time: 5:27 PM
 */
public class GoogleUrlShortenerApiIntegrationUsingScribeAndGsonExample {

    /**
     * Main Method
     *
     * @param args arguments
     */
    public static void main(String[] args) {

        //Instantiating the oAuth Service of Scribe-Java API
        OAuthService oAuthService = new ServiceBuilder()

                //Google Api Provider - Google's URL Shortener API is part of Google Platform APIs
                .provider(GoogleApi.class)

                /*
                    Using "anonymous" as API Key & Secret because Google's URL Shortener service
                    does not necessarily requires App identification and/or User Information Access
                 */
                .apiKey("anonymous")
                .apiSecret("anonymous")

                //OAuth 2.0 scope for the Google URL Shortener API
                .scope("https://www.googleapis.com/auth/urlshortener")

                //build it!
                .build();

        //Instantiating oAuth Request of type POST and with Google URL Shortener API End Point URL
        OAuthRequest oAuthRequest = new OAuthRequest(Verb.POST, "https://www.googleapis.com/urlshortener/v1/url");

        //set the content type header to application/json - this is the type of content you are sending as payload
        oAuthRequest.addHeader("Content-Type", "application/json");

        //Preparing JSON payload to send url to Google URL Shortener
        String json = "{\"longUrl\": \"http://h1b-work-visa-usa.blogspot.com/\"}";

        //add xml payload to request
        oAuthRequest.addPayload(json);

        //send the request
        Response response = oAuthRequest.send();

        //print the response from server
        System.out.println("response.getBody() = " + response.getBody());

        //determining the generic type of map
        Type typeOfMap = new TypeToken<Map<String, String>>() {}.getType();
        //desrialize json to map
        Map<String, String> responseMap = new GsonBuilder().create().fromJson(response.getBody(), typeOfMap);

        //print id which is actually the shortened url
        System.out.println("Shortened URL = " + responseMap.get("id"));
    }

}