LCDUNG.

@Entity
@Table(name = "user")
public class UserModel {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private BigInteger userNo;
    @NotEmpty
    @Column(name = "lastName")
    private String email;
    public BigInteger getUserNo() {
        return this.userNo;
    }
    public void setUserNo(BigInteger userNo) {
        this.userNo = userNo;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}