How to get the user's location ?

JAVA How to get user location ? ? ? Like cell phones have GPS positioning can get to put ? Specifically how to get it, to get the user and then a city on the line. Seeking code , seeking help ah !
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before use, specifically to see this article : http://blog.csdn.net/withiter/article/details/8945890

  public class GeoBusiness {
  	/**
  	 * @param args
  	 * @throws IOException
  	 */
  	public static void main(String[] args) throws IOException {
  		// TODO Auto-generated method stub
  		System.out.println(getLocationByIp("220.181.111.147").getCity());
  		System.out.println(getLocationByIp("220.181.111.147").getCountryName());
  	}
  
  	public static Location getLocationByIp(String ipaddr) throws IOException {
  		String sep = System.getProperty("file.separator");
  		String dir = Play.configuration.getProperty("geoip.datdir");
  		String dbfile = dir + sep + "GeoLiteCity.dat";
  		LookupService cl = new LookupService(dbfile,
  				LookupService.GEOIP_MEMORY_CACHE);
  		Location location = cl.getLocation(ipaddr);
  
  		cl.close();
  		return location;
  	}
  }
  

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I call a good look at that web , it seems relatively simple !