《Spring in Action3》笔记：
@RequestMapping(method=RequestMethod.POST)
public StringaddSpitterFromForm(@Valid Spitter spitter, BindingResult bindingResult){
if(bindingResult.hasErrors()){
return"spitters/edit";
}
spitterService.saveSpitter(spitter);
return "redirect:/spitters/"+spitter.getUsername();
}
By redirecting to another page, we can avoid duplicate submission of the form if the user
clicks the Refresh button in their browser.