Elegant way to get locale in Spring controller

Question

I'm looking for a cleaner way (in Spring 3.2) to get the current locale than explicitly calling LocaleContextHolder.getLocale () at the beginning of each controller method. It must be compatible with Java annotation, as I am not using XML configuration. Here is what I am doing now.

@Controller public class WifeController { @Autowired private MessageSource msgSrc; @RequestMapping(value = "/wife/mood") public String readWife(Model model, @RequestParam("whatImDoing") String iAm) { Locale loc = LocaleContextHolder.getLocale(); if(iAm.equals("playingXbox")) { model.addAttribute( "statusTitle", msgSrc.getMessage("mood.angry", null, loc) ); model.addAttribute( "statusDetail", msgSrc.getMessage("mood.angry.xboxdiatribe", null, loc) ); } return "moodResult"; } } 

Answer 1

In the Spring 3.2 reference docs , section 17.3.3, Supported Method Argument Types:

The supported method arguments are as follows:

• Request or response objects (Servlet API). Select any specific type of request or response, for example ServletRequest or HttpServletRequest.
  
  

  (...)
  
  

• java.util.Locale for the current locality request, determined by the most specific locale recognizer available, in essence, configured by LocaleResolver in the Servlet environment.

So, all you have to do is get an instance of Locale as an argument in each method:

 @RequestMapping(value = "/wife/mood") public String readWife(Model model, @RequestParam("whatImDoing") String iAm, Locale loc) { if (iAm.equals("playingXbox")) { model.addAttribute("statusTitle", msgSrc.getMessage("mood.angry", null, loc)); model.addAttribute("statusDetail", msgSrc.getMessage("mood.angry.xboxdiatribe", null, loc)); } return "moodResult"; }