@RequestMapping(
     value = "/expense",
     method = RequestMethod.POST,
     produces = MediaType.APPLICATION_JSON_VALUE,
     consumes = MediaType.APPLICATION_JSON_VALUE)
 @ResponseBody
 public ResponseEntity<Void> addExpense(@RequestBody Expense expense, HttpServletRequest request) {
   expenseService.addExpense(expense);
   return new ResponseEntity<Void>(HttpStatus.CREATED);
 }