@RestController
@RequestMapping("/sample")
public class SampleController {

	@InitBinder("SampleGet")
	public void initBinder(WebDataBinder binder) {
		binder.addCustomFormatter(new TestFormatter());
	}

	@GetMapping("{id}")
	public Map<String, String> get(Model model, @PathVariable("id") Integer id) {
    		...
	}

	@GetMapping
	public SampleGetRequest list(@ModelAttribute("SampleGet") SampleGetRequest request) {
		return request;
	}
}