[Spring Boot] 현재 로그인한 회원 정보 보기

[HomeController.java]

(1) Principal 이용

@Controller
@RequiredArgsConstructor
public class HomeController {
    @PreAuthorize("isAuthenticated()")
    @GetMapping("/currentUserOrigin")
    @ResponseBody
    public Principal currentUserOrigin(Principal principal) {
        return principal;
    }
}

(2) @AuthenticationPrincipal 이용

@Controller
@RequiredArgsConstructor
public class HomeController {
    @GetMapping("/currentUser")
    @ResponseBody
    public MemberContext currentUser(@AuthenticationPrincipal MemberContext memberContext) {
        return memberContext;
    }
}