Get Response from Webservice and converts into String

WebServiceUtil

public static String getDataFromURL(URL url) throws IOException
	{
		OkHttpClient client = new OkHttpClient();
		HttpURLConnection connection = client.open(url);
		InputStream in = null;
		try
		{
			// Read the response.
			in = connection.getInputStream();
			return convertStreamToString(in);
		}
		finally
		{
			if (in != null)
				in.close();
		}
	}

	public static String sendDataToServer(URL url) throws IOException
	{
		OkHttpClient client = new OkHttpClient();

		HttpURLConnection connection = client.open(url);
		OutputStream out = null;
		InputStream in = null;
		try
		{
			// Write the request.
			connection.setRequestMethod("POST");
			out = connection.getOutputStream();
			out.close();

			// Read the response.
			if (connection.getResponseCode() != HttpURLConnection.HTTP_OK)
			{
				throw new IOException("Unexpected HTTP response: " + connection.getResponseCode() + " " + connection.getResponseMessage());
			}
			in = connection.getInputStream();
			return convertStreamToString(in);
		}
		finally
		{
			// Clean up.
			if (out != null)
				out.close();
			if (in != null)
				in.close();
		}

	}

	private static String convertStreamToString(InputStream is)
	{
		BufferedReader reader = new BufferedReader(new InputStreamReader(is));
		StringBuilder sb = new StringBuilder();

		String line = null;
		try
		{
			while ((line = reader.readLine()) != null)
			{
				sb.append(line + "\n");
			}
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
		finally
		{
			try
			{
				is.close();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
		}
		return sb.toString();
	}