一.存储Annotation

@Entity@Table(name="t_goods")@Inheritance(strategy=InheritanceType.JOINED)public class Goods{    @Id    @GeneratedValue(strategy = GenerationType.AUTO)    private int id;    @Column(name="gname")    private String name;    private float price;    private String introduce;    private int smallType;    private String pic;    ...}@Entity@Table(name = "t_goods_book")@PrimaryKeyJoinColumn(name = "id")public class Goods_Book extends Goods{    private String writer;    private String publisher;    private String publish_time;    ...}

二.查询

    查询后向下转型即可