Caused by: org.hibernate.AnnotationException: No identifier specified for entity:

最新推荐文章于 2020-08-24 09:49:57 发布
原创 最新推荐文章于 2020-08-24 09:49:57 发布 · 278 阅读 · 0 ·
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#spring data JPA

本文解析了一个关于Hibernate框架中@Id注解使用不当导致的项目报错问题。错误源自SpringData与JPA包中@Id注解的冲突，通过更换正确的包引用解决了实体类标识符指定错误。

项目报错如下：

Caused by: org.hibernate.AnnotationException: No identifier specified for entity:

原因是没有加@Id注解，但是我发现我的字段上是加了的。最后发现引入的包不对。

错误的包：

import org.springframework.data.annotation.Id;

正确的包：

import javax.persistence.*;

 

Caused by: org.hibernate.AnnotationException: No identifier specified for entity
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今天在测试 jpa 读取数据库时出现这错误，指示没有实体标识符 Caused by: org.hibernate.AnnotationException: No identifier specified for entity 根据Hinbernate的规范，一定要为实体类添加唯一的标识符，即主键id。在私有变量或set方法之上添加注解即可。 @Id @GeneratedValue private Integer categoryId; ...
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org.hibernate.AnnotationException: No identifier specified for entity
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Caused by: org.hibernate.AnnotationException: No identifier specified for entit
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Caused by: org.hibernate.AnnotationException: No identifier specified for entit 去掉@Entity
报错 org.hibernate.AnnotationException: No identifier specified for entity:
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场景：在springboot整合springdata jpa时抛出错误 Caused by: org.hibernate.AnnotationException: No identifier specified for entity: com.csii.wgc.entity.User at org.hibernate.cfg.InheritanceState.determineDefau...
Caused by: org.hibernate.AnnotationException: No identifier specified for entity: com.s59.pojo.Book
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在Hibernate中，每个实体类必须有一个主键，以便能够在数据库中唯一标识每个实体。请检查你的实体类中是否指定了主键，主键可以使用@Id注解指定。例如： ``` @Entity public class Book { @Id @GeneratedValue...
2025-06-01 14:44:41.148 ERROR 2312 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: No identifier specified for entity: com.kucun.data.entity.Kucun at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1799) ~[spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1109) ~[spring-context-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:755) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:402) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE] at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:173) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE] at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:153) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE] at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:95) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE] at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:172) [spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5128) [catalina.jar:9.0.37] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [catalina.jar:9.0.37] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:717) [catalina.jar:9.0.37] at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:690) [catalina.jar:9.0.37] at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:705) [catalina.jar:9.0.37] at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1133) [catalina.jar:9.0.37] at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1866) [catalina.jar:9.0.37] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_331] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_331] at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-util.jar:9.0.37] at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112) [na:1.8.0_331] at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1045) [catalina.jar:9.0.37] at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:429) [catalina.jar:9.0.37] at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1576) [catalina.jar:9.0.37] at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:309) [catalina.jar:9.0.37] at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123) [catalina.jar:9.0.37] at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:423) [catalina.jar:9.0.37] at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:366) [catalina.jar:9.0.37] at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:936) [catalina.jar:9.0.37] at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841) [catalina.jar:9.0.37] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [catalina.jar:9.0.37] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) [catalina.jar:9.0.37] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) [catalina.jar:9.0.37] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_331] at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-util.jar:9.0.37] at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) [na:1.8.0_331] at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) [catalina.jar:9.0.37] at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) [catalina.jar:9.0.37] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [catalina.jar:9.0.37] at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421) [catalina.jar:9.0.37] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [catalina.jar:9.0.37] at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930) [catalina.jar:9.0.37] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [catalina.jar:9.0.37] at org.apache.catalina.startup.Catalina.start(Catalina.java:738) [catalina.jar:9.0.37] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_331] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_331] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_331] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_331] at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:342) [bootstrap.jar:9.0.37] at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:473) [bootstrap.jar:9.0.37] Caused by: org.hibernate.AnnotationException: No identifier specified for entity: com.kucun.data.entity.Kucun at org.hibernate.cfg.InheritanceState.determineDefaultAccessType(InheritanceState.java:266) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.cfg.InheritanceState.getElementsToProcess(InheritanceState.java:211) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:785) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl.processEntityHierarchies(AnnotationMetadataSourceProcessorImpl.java:248) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.boot.model.process.spi.MetadataBuildingProcess$1.processEntityHierarchies(MetadataBuildingProcess.java:239) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:282) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1224) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1255) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391) ~[spring-orm-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378) ~[spring-orm-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1858) ~[spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1795) ~[spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE] ... 58 common frames omitted
最新发布
06-02
从你的问题来看，你遇到了一个 `No identifier specified for entity: com.kucun.data.entity.Kucun` 的错误。这个错误表明 Hibernate 无法找到 `Kucun` 实体类中的主键定义。 --- ### 解决方案 #### 1. 确保实体...
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Exception resolution: org.hibernate.AnnotationException:No identifier specified for entity
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Caused by: org.hibernate.AnnotationException: No identifier specified fo
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