Spring MVC: how to indicate whether a path variable is required or not?

Question

I am doing a Spring web. For a controller method, I am able to use RequestParam to indicate whether a parameter it is required or not. For example:

@RequestMapping({"customer"})  public String surveys(HttpServletRequest request,  @RequestParam(value="id", required = false) Long id,             Map<String, Object> map) 

I would like to use PathVariable such as the following:

@RequestMapping({"customer/{id}"})  public String surveys(HttpServletRequest request,  @PathVariable("id") Long id,             Map<String, Object> map)  

How can I indicate whether a path variable is required or not? I need to make it optional because when creating a new object, there is no associated ID available until it is saved.

Thanks for help!

Answer 1

VTTom`s solution is right, just change "value" variable to array and list all url possibilities: value={"/", "/{id}"}

@RequestMapping(method=GET, value={"/", "/{id}"}) public void get(@PathVariable Optional<Integer> id) {   if (id.isPresent()) {     id.get()   //returns the id   } }