1. 환경 1. Sping Boot 2. Spring Data JPA 3. Gradle 4. postgreSQL 5. PostMan 6. Swagger 7. 인텔리제이 무료버전 2. DB 구조 3. CRUD 구현 (1). Entity 생성 @Entity @Getter @Setter @ToString @Table(name = "room_cd") public class EclassRoomEntity { @Id @Column(name = "room_cd_id", length = 36) private String roomCdId; @Column(nullable = false, length = 100) private String roomNm; // 강의실명 @Column(nullable = false) priva..