시그마 삽질==six 시그마

1. Entity & DTO //setter는 잘 안쓰지만 테스트용도로.... package study.querydsl.entity; import com.fasterxml.jackson.annotation.JsonBackReference; import com.fasterxml.jackson.annotation.JsonIgnore; import lombok.*; import javax.persistence.*; @Entity @Getter @Setter @NoArgsConstructor(access = AccessLevel.PROTECTED) @ToString(of = {"id", "username", "age"}) public class Member { @Id @GeneratedValue @Column(..