spring org.hibernate.AnnotationException：没有为实体指定标识符 - 即使它是
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/15320408/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
org.hibernate.AnnotationException: No identifier specified for entity - even when it was
提问by checklist
I have the following configuration:
我有以下配置：
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="jpaDataSource" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.example.domain</value>
<value>com.example.repositories</value>
</list>
</property>
</bean>
I have my Geoname class in com.example.domain:
我在 com.example.domain 中有我的 Geoname 类：
@Entity
@Table(name="geonames")
public class Geoname implements Serializable {
@Id
@Column(name="geonameid")
private Long geonameid = null;
}
yet, when running, I get the following exception:
然而，在运行时，我收到以下异常：
Caused by: org.hibernate.AnnotationException: No identifier specified for entity: com.example.domain.Geoname at org.hibernate.cfg.InheritanceState.determineDefaultAccessType(InheritanceState.java:277) at org.hibernate.cfg.InheritanceState.getElementsToProcess(InheritanceState.java:224) at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:664) at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3449) at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3403) at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1330) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1730)
引起：org.hibernate.AnnotationException：没有为实体指定标识符：com.example.domain.Geoname at org.hibernate.cfg.InheritanceState.determineDefaultAccessType(InheritanceState.java:277) at org.hibernate.cfg.InheritanceState.getElementsToProcess( InheritanceState.java:224) at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:664) at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3449) at org.hibernate.cfg.Configuration $MetadataSourceQueue.processMetadata(Configuration.java:3403) at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1330) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1730)
Any ideas why?
任何想法为什么？
side note: I am combining both mongodb and hibernate/ mysql on this project.
旁注：我在这个项目中结合了 mongodb 和 hibernate/mysql。
回答by checklist
I had the following
我有以下
import org.springframework.data.annotation.Id;
Naturally, it should be:
自然应该是：
import javax.persistence.Id;
Thanks to @JB Nizet
感谢@JB Nizet
回答by Kunal Hazard
I faced the same error.I solved it and figured out i didn't put @Id annotations in id field in my Entity class.
我遇到了同样的错误。我解决了它并发现我没有在我的实体类的 id 字段中放置 @Id 注释。
@Entity
@Table(name="geonames")
public class Geoname implements Serializable {
@Column(name="geonameid")
private Long geonameid = null;
}
回答by PSR
try this
尝试这个
@Column(name="geonameid",unique=true,nullable=false)
