我是新来的hibernate。我想做的是用来@CollectionId为我的Address类生成一个标识符。我已经Collection为此使用接口。但是,当我使用@GenericGenerator策略并将其设置为hilo时,它将引发异常。这是我的代码:
@CollectionId
Collection
@GenericGenerator
@Entity @Table(name = "USER_DETAILS") public class UserDetails { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private int userId; private String userName; @ElementCollection @JoinTable(name="USER_ADDRESS", joinColumns=@JoinColumn(name="USER_ID") ) @GenericGenerator(name = "hilo-gen", strategy = "hilo") @CollectionId(columns = { @Column(name="ADDRESS_ID") }, generator = "hilo-gen", type = @Type(type="long")) private Collection<Address> address = new ArrayList<Address>(); public int getUserId() { return userId; } public void setUserId(int userId) { this.userId = userId; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public Collection<Address> getAddress() { return address; } public void setAddress(List<Address> address) { this.address = address; } }
我得到以下异常:
Exception in thread "main" org.hibernate.MappingException: Could not instantiate id generator [entity-name=null] at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.createIdentifierGenerator(DefaultIdentifierGeneratorFactory.java:121) at org.hibernate.mapping.SimpleValue.createIdentifierGenerator(SimpleValue.java:259) at org.hibernate.persister.collection.AbstractCollectionPersister.<init>(AbstractCollectionPersister.java:429) at org.hibernate.persister.collection.BasicCollectionPersister.<init>(BasicCollectionPersister.java:57) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.hibernate.persister.internal.PersisterFactoryImpl.createCollectionPersister(PersisterFactoryImpl.java:152) at org.hibernate.persister.internal.PersisterFactoryImpl.createCollectionPersister(PersisterFactoryImpl.java:140) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:408) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:708) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724) at com.hbt.HibernateTest.main(HibernateTest.java:35) Caused by: java.lang.UnsupportedOperationException: Support for 'hilo' generator has been removed at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.getIdentifierGeneratorClass(DefaultIdentifierGeneratorFactory.java:132) at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.createIdentifierGenerator(DefaultIdentifierGeneratorFactory.java:112) ... 14 more
我正在使用最新的hibernate模式。我该怎么办?
不再支持Hilo,这应该可以工作
@GenericGenerator(name="sequence-gen",strategy="sequence")