小编Dmi*_*aev的帖子

在我的应用程序中,我使用Spring Data和hibernate作为JPA提供程序来持久化和读取数据.

我有顶级实体类:

@Entity
@Getter @Setter
@Table(name = "operation")
@Inheritance(strategy = InheritanceType.JOINED)
@EqualsAndHashCode(of = {"operationId"})
public abstract class Operation implements Serializable {
    public static final int OPERATION_ID_LENGTH = 20;

    @Id
    @Column(name = "operation_id", length = OPERATION_ID_LENGTH, nullable = false, columnDefinition = "char")
    private String operationId;

    @Column(name = "operation_type_code")
    @Getter(AccessLevel.NONE)
    @Setter(AccessLevel.NONE)
    private String operationTypeCode;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "begin_timestamp", nullable = false)
    private Date beginTimestamp = new Date();

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "end_timestamp")
    private Date endTimestamp;

    @Column(name = "operation_number", length = 6, columnDefinition …