RestMemberController.java

import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class RestMemberController {

  private MemberDao memberDao;
  private MemberRegisterService registerService;

  ...

  @PostMapping("/api/members")
  public void newMember(@RequestBody @Valid RegisterRequest regReq, HttpServletResponse response) throws IOException {
    ...
  }

  ...

}