Example of request header filtering by content type in a Spring RestController

RequestHeaderFilterExample

@RestController
class MapFilterController {

    @GetMapping(value = "/test", headers = "content-type=text/*")
    public String getTestText() {
        return "This is a test, using text.";
    }

    @GetMapping(value = "/test", headers = "content-type=application/json")
    public Map<String, String> getTestJson() {
        return Collections.singletonMap("testKey", "testValue");
    }

}