Entity

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@NoArgsConstructor
@Entity
@Getter
@Table(name = "member")
public class Member {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "member_id")
    private Long id;

    private String name;

    private String password;

    @Column(unique = true)
    private String email;

    private String address;

    @Enumerated(EnumType.STRING)
    private MemberRole role;

    @Builder
    public Member(String name, String email, String password, String address, MemberRole role) {
        this.name = name;
        this.password = password;
        this.email = email;
        this.address = address;
        this.role = role;
    }

    //Builder를 사용하여 member 생성
    public static Member createMember(MemberFormDto memberFormDto, PasswordEncoder passwordEncoder) {
        Member member = Member.builder()
                .name(memberFormDto.getName())
                .email(memberFormDto.getEmail())
                .address(memberFormDto.getAddress())
                .password(passwordEncoder.encode(memberFormDto.getPassword()))
                .role(MemberRole.USER)
                .build();
        return member;
    }
}

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Dto

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@NoArgsConstructor
@Data
public class MemberFormDto {

    @NotBlank(message = "이름은 필수 입력 값입니다.")
    private String name;

    @NotEmpty(message = "이메일은 필수 입력 값입니다.")
    @Email(message = "이메일 형식으로 입력해주세요.")
    private String email;

    @NotEmpty(message = "비밀번호는 필수 입력 값입니다.")
    @Length(min = 4, max = 16, message = "비밀번호는 4자리 이상, 16자 이하로 입력해주세요.")
    private String password;

    private String address;

    @Builder
    public MemberFormDto(String name, String email, String password, String address) {
        this.name = name;
        this.email = email;
        this.password = password;
        this.address = address;
    }
}

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Interface

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public interface MemberService {

    Member saveMember(Member member);

    void validateDuplicateMember(Member member);

    UserDetails loadUserByUsername(String email) throws UsernameNotFoundException;
}

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Repository

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@Repository
public interface MemberRepository extends JpaRepository<Member, Long> {

    Member findByEmail(String email);
}

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Service