예외처리(Exception)기능 + Response 기능(데이터 반환) 을 추가한 게시판 만들기 코드

Response package com.example.mentoring.Response; import com.fasterxml.jackson.annotation.JsonInclude; import com.sun.net.httpserver.Authenticator; import lombok.AccessLevel; import lombok.AllArgsConstructor; import lombok.Getter; @JsonInclude(JsonInclude.Include.NON_NULL)// Null 버림 @AllArgsConstructor(access = AccessLevel.PRIVATE) @Getter public class Response { private boolean success; private .....