@RequestParam v.s. @PathVariable

• @PathVariable: 路徑中的變數
  如/user/{userId} userId為PathVariable，1,2,3,...
• @RequestParam: ?後接的那一串
  如/oo/xx?name=aa，name=aa為RequestParam

example:

@RequestMapping(value="/user/{userId}/invoices", method = RequestMethod.GET)
public List listUsersInvoices(
            @PathVariable("userId") int user,
            @RequestParam(value = "date", required = false) Date dateOrNull) {
  ...
}

參考：http://stackoverflow.com/questions/13715811/requestparam-vs-pathvariable