@RequestMapping(method = POST, value = "/{name}/deposit")
 public ModelAndView depositAmount(@PathVariable String name, @RequestParam String amount) {
   accountService.depositAmount(name, Long.parseLong(amount));
   long balance = accountService.getBalance(name);
   return new ModelAndView(
       "redirect:/accounts/" + name, "account", new AccountView(name, balance, ""));
 }