ZooController.java

@RestController
@RequestMapping(path = "/zoo")
public class ZooController {

   @PostMapping(path = "/add", consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
   public String addAnimal(@RequestBody String payload) {
       return "OK from post addAnimal";
   }

   @GetMapping(path = "/all")
   public Collection<String> getAnimals() {
       return List.of("OK from getAnimals");
   }
}