title: How are POST parameters handled in Spring 3 when some are in URL?
body: <p>I typically retrieve POST parameters like the following:</p>
  
  <pre><code>@RequestMapping(method = RequestMethod.POST)
  public ModelAndView create(
      @RequestParam(value = "first_name", required = false) String firstName,
      HttpServletRequest request
  ) {
  </code></pre>
  
  <p>But what if some parameters are in the URL like <code>http://example.com/post/path?last_name=Smith</code>?  Is Spring supposed to grab all the parameters from both the URL and the POST data when <code>RequestMapping</code> is POST?</p>
  
  <p>Basically, Facebook sends a signed_request parameter via POST and other parameters like request_ids at the same time via URL parameters.  I need to get both.</p>