最近在学习 SpringBoot，刚才写了个方法，在测试的时候，报了下列错误

Caused by: org.hibernate.AnnotationException: No identifier specified for entity: com.liuyanzhao.sell.entity.ProductInfo
 at org.hibernate.cfg.InheritanceState.determineDefaultAccessType(InheritanceState.java:265)
 at org.hibernate.cfg.InheritanceState.getElementsToProcess(InheritanceState.java:211)
 at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:717)
 at org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl.processEntityHierarchies(AnnotationMetadataSourceProcessorImpl.java:245)
 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:847)
 at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:874)
 at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60)
 at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:353)
 at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:370)
 at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:359)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
 ... 39 more

 

网上查了一下，都是说没有给加主键，或者没有加 @Id 注解。

然后，事实上我都是加了的。

后来发现，原来是导错了包

@Id 所在的包导错了

 

 

导入错误的

import org.hibernate.annotations.Entity;

import org.springframework.data.annotation.Id;

 

导入正确的后

import javax.persistence.Entity;

import javax.persistence.Id;

 

下次导入包的时候，一定要小心呀





 

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