针对你遇到的“jpa metamodel must not be empty!”错误,这通常意味着JPA的元模型(Metamodel)没有正确生成或配置。基于你提供的提示,我将分点详细解答这个问题: 检查JPA实体类是否已正确定义: 确保你的JPA实体类使用了正确的注解,并且类结构是有效的。例如: java import javax.persistence.Entity; import javax....
lang.IllegalArgumentException: At least one JPA metamodel must be present! at org.springframework.util.Assert.notEmpty(Assert.java:450) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE] at org.springframework.data.jpa.mapping.JpaMetamodelMappingContext.<init>(JpaMetamodelMappingContext.java:54) ...
> at org.springframework.util.Assert.notEmpty(Assert.java:438) ~[spring-core-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT] > at org.springframework.data.jpa.mapping.JpaMetamodelMappingContext.<init>(JpaMetamodelMappingContext.java:52) > ~[spring-data-jpa-1.11.0.BUILD-SNAPSHOT.jar:na]...
Caused by: java.lang.IllegalArgumentException: At least one JPA metamodel must be present! at org.springframework.util.Assert.notEmpty(Assert.java:450) at org.springframework.data.jpa.mapping.JpaMetamodelMappingContext.<init>(JpaMetamodelMappingContext.java:55) at org.springframework.data.jpa....
>org.springframework.beans.factory.BeanCreationException: Error>creating bean with name'jpaMappingContext': Invocation of init method>failed; nested exception is java.lang.IllegalArgumentException: At>least one JPA metamodel must be present!>at org.springframework.beans.factory.support.Abstr...
Caused by: java.lang.IllegalArgumentException: At least one JPA metamodel must be present! at org.springframework.util.Assert.notEmpty(Assert.java:277) ~[spring-core-4.3.10.RELEASE.jar:4.3.10.RELEASE] at org.springframework.data.jpa.mapping.JpaMetamodelMappingContext.<init>(JpaMetamodelMapping...
Causedby: java.lang.IllegalArgumentException:Atleast oneJPAmetamodel must be present! at org.springframework.util.Assert.notEmpty(Assert.java:277) at org.springframework.data.jpa.mapping.JpaMetamodelMappingContext.<init>(JpaMetamodelMappingContext.java:52)at org.springframework.d...
default (no-argument) constructor for class: com.example.accessingdatajpa.Customer (class must be ...
import java.io.Serializable; import javax.persistence.EntityManager; import org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation; import org.springframework.data.jpa.repository.support.JpaRepositoryFactory; import org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean; ...
Behind the scene,JPAStreamerautomatically generates a metamodel by an annotation processorthat operates at compile time as soon as JPAstreamer has been installed. The annotation processor inspects all classes annotated with@Entity. For example, ‘User.class‘ generates an equivalent‘User$.class’in ...