Order of different Spring controller methods by params - spring-boot

Question

There are two methods in the following controller with different params values.
#RestController
#RequestMapping("/api/v1")
public class ToyApiController {
#GetMapping(value = "/toys", params = {"toySize=large"}, produces = MediaType.APPLICATION_JSON_VALUE)
public ToysVO listLargeToys(ListToyCommand listToyCommand) {
// ...
}
#GetMapping(value = "/toys", params = {"country"}, produces = MediaType.APPLICATION_JSON_VALUE)
public ToysVO listToysOfCountry(ListToyCommand listToyCommand) {
// ...
}
}
The API below is expected to hit the listLargeToys method. The behavior is correct.
GET /api/v1/toys?toySize=large&max=10
The API below is expected to hit the listToysOfCountry method. However, the listLargeToys method is hit.
GET /api/v1/toys?country=france&toySize=large&max=10
The code in this post is simplified from actual code. I know that the two methods can be combined into a single method that checks the toySize and country parameters and returns different values accordingly. I'm just wondering whether the listToysOfCountry method can be hit by some tiny changes, e.g. specifying parameters like params without combining the two methods.
GET /api/v1/toys?country=france&toySize=large&max=10

Answer 1

I guess you need some like this:
#RequestMapping(
value = "/toys",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_JSON_VALUE)
#ResponseBody ResponseEntity<String> toys(
#RequestParam(value = "toySize", required = false) String toySize,
#RequestParam(value = "country", required = false) String country,
#RequestParam(value = "max", required = false) Integer max) {
if(null != max && max == 10) {
System.out.println("You send 10 dude.");
}
return new ResponseEntity<String>("{ \"toySize\": "+ toySize +", \"country\": "+ country +", \"max\": "+ max +"}", HttpStatus.OK);
}
Using "required = false", you make param optional :)

Answer 2

By adding a !country in params for listLargeToys API, GET /api/v1/toys?country=france&toySize=large&max=10 no longer goes into listLargeToys API. Instead, it goes into listToysOfCountry as expected.
#RestController
#RequestMapping("/api/v1")
public class ToyApiController {
#GetMapping(value = "/toys", params = {"toySize=large", "!country"}, produces = MediaType.APPLICATION_JSON_VALUE)
public ToysVO listLargeToys(ListToyCommand listToyCommand) {
// ...
}
#GetMapping(value = "/toys", params = {"country"}, produces = MediaType.APPLICATION_JSON_VALUE)
public ToysVO listToysOfCountry(ListToyCommand listToyCommand) {
// ...
}
}