@Table(name="person")public class Person {
@Id @GeneratedValue //不写是采用默认策略，即：(Strategy=Generation.AUTO) private Integer id; //主键且数据库是mysql就自动增长(identified),是Oracle就序列化(sequence) @Column(length=10, nullable=false) //长度为10，且不能为空 private String name; @Temporal(TemporalType.DATE) //日期类型 private Date birthday; @Lob //长整型，对应到mysql数据库为LongText private String info; @Lob @Basic(fetch=FetchType.LAZY) //二进制数据，且延迟加载 private Byte[] file; @Enumerated(EnumType.STRING) @Column(length=5,nullable=false) //枚举类型，且将值存入数据库private Gender gender= Gender.MAN;
@Transient //不映射进数据库 private String imagepath;}