org.hibernate.AnnotationException:没有为使用JPA实体映射的实体指定标识符
org.hibernate.AnnotationException:没有为使用JPA实体映射的实体指定标识符
提问于 2016-11-03 11:06:19
我现在正在使用Hibernate 5.2.4.Final (从5.2.3升级到查看这是否会修复错误，但仍然没有成功)。
我有以下SQL：
CREATE TABLE Token (
tokenId BIGINT PRIMARY KEY
,uuid UUID
,state INTEGER
,creationDate TIMESTAMP
,expirationDate TIMESTAMP
,userId BIGINT REFERENCES MyUser(id)
);
CREATE SEQUENCE TokenIdSeq;以及映射文件中的以下实体：
<entity name="Token" class="com.library_provider.Token" access="FIELD">
<id name="tokenId">
<generated-value strategy="SEQUENCE" generator="TokenIdSeq" />
<sequence-generator name="TokenIdSeq" sequence-name="TokenIdSeq" allocation-size="1" />
</id>
<basic name="uuid" />
<basic name="state" />
<basic name="creationDate" />
<basic name="expirationDate" />
<many-to-one name="userData" class="com.company.MyUser" column="userId" />
</entity>Token类是：
public class Token implements Serializable {
private static final long serialVersionUID = 12432342342423400L;
private Long tokenId;
private UUID uuid;
private Integer state;
private Date creationDate;
private Date expirationDate;
public UserData userData;
//....
}在引导Tomcat时，我得到了以下异常：
Caused by: org.hibernate.AnnotationException: No identifier specified for entity: com.library_provider.Token
at org.hibernate.cfg.InheritanceState.getElementsToProcess(InheritanceState.java:231)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:719)
at org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl.processEntityHierarchies(AnnotationMetadataSourceProcessorImpl.java:249)
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess$1.processEntityHierarchies(MetadataBuildingProcess.java:222)
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:265)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:846)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:873)
at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:151)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:353)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:373)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:362)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1642)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1579)
... 21 more我使用的是JPA映射文件，而不是注释。为什么要抛出这个异常？我的其他实体运行良好，与在这些字段中使用<id name="id">的不同，但在本例中，我无法决定/更改tokenId字段的名称。
回答 1
Stack Overflow用户
回答已采纳
发布于 2016-11-03 11:25:12
JPA映射文件在<attributes>中缺少<entity>标记。
它应该是：
<entity name="Token" class="com.library_provider.Token" access="FIELD">
<attributes>
<id name="tokenId">
<generated-value strategy="SEQUENCE" generator="TokenIdSeq" />
<sequence-generator name="TokenIdSeq" sequence-name="TokenIdSeq" allocation-size="1" />
</id>
<basic name="uuid" />
<basic name="state" />
<basic name="creationDate" />
<basic name="expirationDate" />
<many-to-one name="userData" class="com.company.MyUser" column="userId" />
</attributes>
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原文链接：
https://stackoverflow.com/questions/40399934
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