Question

我对以下错误感到困惑，我尝试了许多堆栈溢出建议，但均未奏效。

我收到此错误。

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'productService': Unsatisfied dependency expressed through field 'ProductRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'ProductRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.entities.product
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:584) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'productRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.entities.product
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1694) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:573) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:495) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]

Caused by: java.lang.IllegalArgumentException: Not a managed type: class com.entities.product
    at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:473) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
    at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:74) ~[spring-data-jpa-2.0.11.RELEASE.jar:2.0.11.RELEASE]

产品服务类别：

@Autowired
    DataSource database;

    @Autowired
    ProductRepository productRepository;


    @Transactional
    public product getAccounts(String account) {
    Product prd = productRepository.selectAccounts(accountId);

        return prd;
    }

产品存储库：

@Repository
public interface productRepository extends JpaRepository<product, String> {



     @Query(value="SELECT Demo FROM Test WHERE ACC_ID=?1,nativeQuery=true) 
     product selectAccounts(@Param("accountId") String accountId );
    }

实体

/*@Entity(name="Product")
@Table(name="test", schema=demo")*/
@Embeddable
public class Product implements Serializable {

    private static final long serialVersionUID = 1L;

    @Column(name="ACCOUNT_ID")
    private String accountId;

我浏览了很多类似的问题，但是并没有帮助。请帮助我解决上述异常。

Answer 1

请确保：

ProductService类用@Service注释
ProductService类具有一个空的构造函数（无参数的构造函数），并且其所有类均具有getter和setter方法字段（如果字段不是公共的）。
当带注释的类用作另一个类的字段时，将使用@Embeddable注释。参见here。 Product类中已注释的注释看起来不错，请取消注释并删除@Embeddable。

Answer 2

Not a managed type: class com.entities.product

异常清楚地表明Product类不是此处的托管类型。通常在Spring Boot / JPA无法扫描存储库中使用的实体时出现。用@EntityScan注释您的主配置类，该异常应消失，例如@EntityScan("com.entities")

EntityScan的文档-https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/autoconfigure/domain/EntityScan.html

Answer 3

我在您的代码中看到的原因是您注释了@Entity批注，该批注基本上用于说明JPA这是实体类；而且您仍然尝试使用Product作为实体。 @Embeddable具有不同的含义，用于为您的实体编写复合主键。

确保Product（一个实体）类具有一个空的构造函数（一个没有参数的构造函数），并且其所有字段都具有getter和setter方法。

JPA-UnsatisfiedDependencyException：初始化方法的调用失败

3 个答案: