Question

我正在Spring引导项目上使用Spring数据存储库和自定义存储库，但我想为海关添加通用存储库。

这是GenericCustomRepositoy：

public interface GenericCustomRepositoy<T, ID> {

    List<T> findByFields(Class<T> clazz, List<Pair<String, Object>> fieldValue, List<Pair<String, Boolean>> orderBy);
}
@Repository
public class GenericCustomRepositoyImpl<T, ID> implements GenericCustomRepositoy<T, ID> {

    @PersistenceContext
    protected EntityManager em;

    public List<T> findByFields(Class<T> clazz, List<Pair<String, Object>> fieldValues, List<Pair<String, Boolean>> orderBy) {

        final CriteriaBuilder cb = em.getCriteriaBuilder();
        final CriteriaQuery<T> cq = cb.createQuery(clazz);
        final Root<T> root = cq.from(clazz);

        ........................

        return em.createQuery(cq).getResultList();
    }

这是我的存储库：

@Repository
public interface AdresseLivraisonRepository extends JpaRepository<AddressEntity, Integer>, GenericCustomRepositoy<AddressEntity, Integer> {

}

当我不运行应用程序时，我会遇到此异常：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'adresseLivraisonRepository': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property fields found for type AddressEntity!
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)

我做错了什么！

我更改了代码，并添加了一个自定义存储库，该存储库扩展了Generic，但出现了相同的异常。

这是新的存储库：

@Repository
public interface AdresseLivraisonRepository extends JpaRepository<ForwardingAddressEntity, Integer>, AdresseLivraisonCustomRepository {

}

Answer 1

您的自定义查询方法的名称遵循Spring Data JPA存储库的命名约定。因此，Spring Data JPA尝试在启动期间为其生成查询方法。

尝试将您的方法重命名为其他名称，例如genericFindByFields(...)

Answer 2

好吧，我通过Spring Data JpaSpecificationExecutor更改了我的泛型类，它做了我想对泛型Advanced Spring Data JPA - Specifications and Querydsl

所做的事情

通用Dao与Spring数据

2 个答案: