Springboot 项目启动报错

最新推荐文章于 2024-01-27 09:47:05 发布

Dalon_G

最新推荐文章于 2024-01-27 09:47:05 发布

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分类专栏：后台文章标签： java.lang.IllegalArgumentExce springboot 项目启动不了

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本文详细解析了SpringBoot项目启动时报错'Not a managed type'的问题，通过调整@Entity和@Id注解的导入包，成功解决了实体类配置错误导致的异常。

新建Springboot后，启动报错

java.lang.IllegalArgumentException: Not a managed type: class com.example.demo.myproject.domain.Entity.User

报错信息如下

Caused by: java.lang.IllegalArgumentException: Not a managed type: class com.example.demo.myproject.domain.Entity.User
	at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:552) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
	at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:74) ~[spring-data-jpa-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:66) ~[spring-data-jpa-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:188) ~[spring-data-jpa-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:139) ~[spring-data-jpa-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:123) ~[spring-data-jpa-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:64) ~[spring-data-jpa-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:305) ~[spring-data-commons-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:297) ~[spring-data-commons-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.util.Lazy.getNullable(Lazy.java:211) ~[spring-data-commons-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.util.Lazy.get(Lazy.java:94) ~[spring-data-commons-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:300) ~[spring-data-commons-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:119) ~[spring-data-jpa-2.1.2.RELEASE.jar:2.1.2.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1741) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
	... 30 common frames omitted

然后死活不知道怎么出现的，最后，改了一个地方，发现是 @Entity 和 @Id 的包到错了。。。。

//import org.hibernate.annotations.Entity;
//import org.springframework.data.annotation.Id;

import javax.persistence.Entity;
import javax.persistence.Id;