@RestController
public class ManagerController {

    private static final Logger LOGGER = LogManager.getLogger(ManagerController.class);

    @RequestMapping(value = "/api/manager/login", consumes = "application/json", produces = "application/json")
    public Response login(Response response, @RequestBody LoginForm loginForm) {

        LOGGER.info(loginForm);

        return response;
    }

    @PostMapping(value = "/api/manager/register", produces = "application/json")
    public Response register(Response response, @ModelAttribute RegisterForm registerForm) {

        LOGGER.info(registerForm);

        return response;
    }

}

public class RegisterForm {

    private Type type;

    private String firstName;
    private String lastName;

    private String phone;

    private long countryId;

    private String email;
    private String password1;
    private String password2;

    private MultipartFile file;

    public RegisterForm() { }

    public Type getType() {
        return type;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public String getPhone() {
        return phone;
    }

    public long getCountryId() {
        return countryId;
    }

    public String getEmail() {
        return email;
    }

    public String getPassword1() {
        return password1;
    }

    public String getPassword2() {
        return password2;
    }

    public MultipartFile getFile() {
        return file;
    }

    @Override
    public String toString() {
        return "RegisterForm{" +
                "type=" + type +
                ", firstName='" + firstName + '\'' +
                ", lastName='" + lastName + '\'' +
                ", phone='" + phone + '\'' +
                ", countryId=" + countryId +
                ", email='" + email + '\'' +
                ", password1='" + password1 + '\'' +
                ", password2='" + password2 + '\'' +
                ", file=" + file +
                '}';
    }

    public enum Type {
        ADMIN, OPERATOR;
    }

}

ajax(true, '/api/manager/register', new FormData(core.body.find('form')[0])).done(result=>{
            if(result.status) {
                location.href='/register/success';
            } else {
                core.toast(result.message);
            }
        }).fail(result=>{
            console.log(result);
        });

@PostMapping(value = "/api/manager/register", consumes = "multipart/*", produces = "application/json")
    public Response register(Response response, @RequestParam(value = "file", required = false) MultipartFile file, @RequestParam("firstName") String name) {

        LOGGER.info(file);
        LOGGER.info(name);

        return response;
    }

@PostMapping(value = "/api/manager/register", consumes = "multipart/*", produces = "application/json")
    public Response register(Response response, RegisterForm registerForm) {

        LOGGER.info(registerForm);

        return response;
    }