https://velog.io/@kjh03160/%EA%B7%B8%EB%9F%B0-REST-API%EB%A1%9C-%EA%B4%9C%EC%B0%AE%EC%9D%80%EA%B0%80
RESTful한 API에 더 익숙해지기
https://www.yes24.com/Product/Goods/18249021
객체지향 도서
