我想使用DB是一樣的東西:休眠:使用其他實體的PK爲PK提供了org.hibernate.MappingException:無法確定類型的錯誤
用戶表: USER_ID ...
User_Action表: USER_ID(FK到User.User_ID,應該是一個一對一的映射) ...
所以我有這個類:
@Entity
@Table(name="User")
public class User {
private long _ID;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "User_ID", nullable = false, unique = true)
public long get_ID() {
return _ID;
}
public void set_ID(long user_ID) {
_ID = user_ID;
}
...
}
,並在另一個類,我有:
@Entity
@Table(name="User_Action")
public class UserAction implements IEntity {
private User _user;
@Id
@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "User_ID")
public User get_user() {
return _user;
}
public void set_user(User _user) {
this._user = _user;
}
...
}
但是運行代碼拋出在初始化的時候出現以下錯誤:
org.hibernate.MappingException: Could not determine type for: mycustom.User, for columns: [org.hibernate.mapping.Column(_user)]
org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:266)
org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:253)
org.hibernate.mapping.RootClass.validate(RootClass.java:193)
org.hibernate.cfg.Configuration.validate(Configuration.java:1099)
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1284)
org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859)
...
我使用的休眠版本:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>3.6.7.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.3.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>3.3.0.ga</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.3.1.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.3.2.GA</version>
</dependency>
我懷疑annoticationConfiguration的東西有問題,但無法確認它或進一步調試..或者是別的東西?
您使用Id註釋標註了您的User屬性。但是該註釋只能應用於某些類型(詳情請參閱:http://docs.oracle.com/javaee/6/api/javax/persistence/Id.html)。如果你想使用實體作爲另一個實體的PK,看看這個SO帖子:http://stackoverflow.com/questions/904634/using-an-entity-and-their-primary-key-as-another-實體來說-ID。 – 2014-11-04 21:03:53