JavaからGoogleの短縮URLを生成

以下、ソースコード貼ります。

    /**
	 * 短縮URL生成
	 * @param longUrl
	 * @return
	 * @throws ClientProtocolException
	 * @throws IOException
	 */
	@SuppressWarnings("resource")
	private static String getShortUrl(String longUrl) throws ClientProtocolException, IOException {
		HttpPost post = new HttpPost("https://www.googleapis.com/urlshortener/v1/url");
		post.setHeader("Content-Type", "application/json");
		post.setEntity(new StringEntity("{'longUrl': '"+longUrl+"'}", "UTF-8"));
		 
		HttpResponse response = new DefaultHttpClient().execute(post);
		 
		String responseText = EntityUtils.toString(response.getEntity());
		
		
		// JsonFactoryの生成
		JsonFactory factory = new JsonFactory();
		// JsonParserの取得
		@SuppressWarnings("deprecation")
		JsonParser parser = factory.createJsonParser(responseText);
		 
		//JSONのパース処理
		String shotUrl = "";
		while (parser.nextToken() != JsonToken.END_OBJECT) {
			String name = parser.getCurrentName();
			if (name != null) {
				parser.nextToken();
				if (name.equals("id")) {
					shotUrl = parser.getText();
				}
			}
		}
		
		return shotUrl;
	}