使用Hibernate在Java实体类上映射MySql unsigned BigInt的正确数据类型是什么?
我使用Hibernate将MySql表映射到实体类。在应用程序中,我遇到以下表\实体映射错误:使用Hibernate在Java实体类上映射MySql unsigned BigInt的正确数据类型是什么?,hibernate,jpa,orm,hibernate-mapping,Hibernate,Jpa,Orm,Hibernate Mapping,我使用Hibernate将MySql表映射到实体类。在应用程序中,我遇到以下表\实体映射错误: Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Schema-validation: wrong column type encountered in column [id] in table [accomodation]; found [bigint (Types#BIGINT)], but expecting
Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Schema-validation: wrong column type encountered in column [id] in table [accomodation]; found [bigint (Types#BIGINT)], but expecting [decimal(19,2) (Types#NUMERIC)]
因此,我有一个名为acccomodation的下表:
Field Type Null Key Default Extra
---------------------------------------------------------------------------------------------------------------------------
id bigint(20) unsigned NO PRI auto_increment
user_id bigint(20) unsigned NO MUL
accomodation_name varchar(255) NO
description text NO
nation varchar(255) NO
region varchar(255) NO
province varchar(255) NO
city varchar(255) NO
geographical_position point NO
stars int(10) NO
accomodation_typological_id bigint(20) unsigned YES
accomodation_service_id bigint(20) unsigned YES
tell varchar(255) YES
mobile varchar(255) YES
fax varchar(255) YES
email varchar(255) YES
time_stamp datetime YES
上表由该住宿类映射:
@Entity
@Table(name = "accomodation")
public class Accomodation implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private BigInteger id;
//private Integer id;
/*@ManyToOne
private Users users;
*/
@OneToMany(mappedBy = "accomodation")
private List<Room> rooms;
private String name;
private String description;
private String phone;
private String mobile;
private String fax;
private String email;
private Integer stars;
private Double longitude;
private Double latitude;
// CONSTRUCTOR AND GETTER AND SETTER METHODS
...........................................................
...........................................................
...........................................................
}
@实体
@表(name=“住宿”)
公共类住宿实现可序列化{
@身份证
@GeneratedValue(策略=GenerationType.IDENTITY)
@列(name=“id”)
私有整数id;
//私有整数id;
/*@许多酮
私人用户;
*/
@OneToMany(mappedBy=“住宿”)
私人名单室;
私有字符串名称;
私有字符串描述;
私人电话;
私有字符串移动;
私人字符串传真;
私人字符串电子邮件;
私人整数星;
私人双经度;
私人双纬度;
//构造函数、GETTER和SETTER方法
...........................................................
...........................................................
...........................................................
}
因此,读取错误时,我的住宿表的id字段上似乎存在映射错误,映射到住宿类的相关id字段上
问题似乎是在映射类上使用biginger作为id字段的类型,我必须在表的id字段上使用decimal(19,2)。但我认为这并不好,因为表的主键应该是DB上的无符号BigInt
那么,我要在类上使用什么样的Java数据类型来正确映射这个无符号BigInt
正如您在前面2段代码中所看到的,您应该能够将Mysql类型bigint(20)映射到Java原语long,例如:
@Entity
@Table(name = "accomodation")
public class Accomodation implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private long id;
但是,根据您的要求,您还应该能够使用java.math.biginger
我的建议是检查驱动程序的版本。您应该能够将Mysql类型bigint(20)映射到Java原语long,例如:
@Entity
@Table(name = "accomodation")
public class Accomodation implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private long id;
但是,根据您的要求,您还应该能够使用java.math.biginger
我的建议是检查驱动程序的版本