Question

我正在使用springboot创建实体并使用CrudRepository创建CRUD函数，我可以使用@Service创建findbyHoliday（String name）我真的想利用springboot CrudRepository，任何人都可以给我一些方向吗？

这里是我的

application.properties

spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
spring.jpa.hibernate.use-new-id-generator-mappings=true
spring.jpa.hibernate.naming.implicit-strategy=org.hibernate.boot.model.naming.ImplicitNamingStrategyLegacyJpaImpl
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
spring.jpa.properties.hibernate.format_sql = false
spring.jpa.properties.hibernate.default_schema=SPRINGUSER

我正在尝试创建一个函数扩展CrudRepository并继承我的界面

HolidayScheduleRepository.java

public interface HolidayScheduleRepository extends CrudRepository<HolidaySchedule,Long>{
List<HolidaySchedule> findByHDay(@Param("HDay") String hday);

}

继承我的实体

HolidaySchedule.java

@Entity // This tells Hibernate to make a table out of this class
@Table(name="TWD_HSD_HOLIDAY_SCHEDULE")
public class HolidaySchedule {
    @Id
    @Column(name="HSD_ID")
    @GeneratedValue(strategy=GenerationType.AUTO)
    private Integer Id;
    @Column(name="HSD_DATE")
    private String HDate;
    @Column(name="HSD_DAY")
    private String HDay;
    @Column(name="HSD_HOLIDAY")
    private String HHoliday;

最后我的控制器方法

@Controller  // This means that this class is a Controller
@RequestMapping(path="/test")
.......
@GetMapping(path="crudtest")
        @ResponseBody
        public List<HolidaySchedule> findHolidayByName(){
            return holidayScheduleRepository.findByHDay("Monday");
        }

和 ERROR 81372 显示

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'holidayScheduleController': Unsatisfied dependency expressed through field 'holidayScheduleRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'holidayScheduleRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Could not create query metamodel for method public abstract java.util.List com.twd.holidayschedule.HolidayScheduleRepository.findByHDay(java.lang.String)!
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:358) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1337) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:574) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:491) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:751) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:865) ~[spring-context-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:122) ~[spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:809) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:404) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:347) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1263) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1252) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at com.twd.TradingWatchDogApplication.main(TradingWatchDogApplication.java:14) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'holidayScheduleRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Could not create query metamodel for method public abstract java.util.List com.twd.holidayschedule.HolidayScheduleRepository.findByHDay(java.lang.String)!
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1701) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:491) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:198) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:250) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1128) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1056) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:570) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    ... 19 common frames omitted
Caused by: java.lang.IllegalArgumentException: Could not create query metamodel for method public abstract java.util.List com.twd.holidayschedule.HolidayScheduleRepository.findByHDay(java.lang.String)!
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:106) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:214) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:77) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$null$0(RepositoryFactorySupport.java:410) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_131]
    at java.util.Iterator.forEachRemaining(Iterator.java:116) ~[na:1.8.0_131]
    at java.util.Collections$UnmodifiableCollection$1.forEachRemaining(Collections.java:1049) ~[na:1.8.0_131]
    at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) ~[na:1.8.0_131]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_131]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_131]
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_131]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_131]
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_131]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$new$2(RepositoryFactorySupport.java:412) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at java.util.Optional.map(Optional.java:215) ~[na:1.8.0_131]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:403) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:241) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$2(RepositoryFactoryBeanSupport.java:258) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.util.Lazy.get(Lazy.java:62) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:261) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:101) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1760) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1697) ~[spring-beans-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    ... 29 common frames omitted
Caused by: java.lang.IllegalArgumentException: Unable to locate Attribute  with the the given name [hDay] on this ManagedType [com.twd.holidayschedule.HolidaySchedule]
    at org.hibernate.metamodel.internal.AbstractManagedType.checkNotNull(AbstractManagedType.java:128) ~[hibernate-core-5.2.10.Final.jar:5.2.10.Final]
    at org.hibernate.metamodel.internal.AbstractManagedType.getAttribute(AbstractManagedType.java:113) ~[hibernate-core-5.2.10.Final.jar:5.2.10.Final]
    at org.springframework.data.jpa.repository.query.QueryUtils.toExpressionRecursively(QueryUtils.java:569) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryCreator$PredicateBuilder.getTypedPath(JpaQueryCreator.java:377) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryCreator$PredicateBuilder.build(JpaQueryCreator.java:300) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryCreator.toPredicate(JpaQueryCreator.java:205) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryCreator.create(JpaQueryCreator.java:117) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryCreator.create(JpaQueryCreator.java:54) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.repository.query.parser.AbstractQueryCreator.createCriteria(AbstractQueryCreator.java:111) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.repository.query.parser.AbstractQueryCreator.createQuery(AbstractQueryCreator.java:90) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.repository.query.parser.AbstractQueryCreator.createQuery(AbstractQueryCreator.java:78) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.PartTreeJpaQuery$QueryPreparer.<init>(PartTreeJpaQuery.java:129) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.PartTreeJpaQuery$CountQueryPreparer.<init>(PartTreeJpaQuery.java:257) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:72) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:103) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
    ... 51 common frames omitted

Answer 1

这是一个艰难的问题，我强烈建议您遵守标准的Java约定，例如使用小写字母（camelCase格式）启动所有字段名称。我相信这就是它无法找到这个领域的原因。

您希望它在存储库

中看起来像这样

`List<HolidaySchedule> findByHDay(String hDay);`

和

@Column(name="HSD_DAY") private String hDay;

在您的模型中。

从这开始，看看它在哪里。

请参阅下面的Spring Reference

https://docs.spring.io/spring-data/jpa/docs/1.11.6.RELEASE/reference/html/#jpa.query-methods.query-creation

Answer 2

另一个解决方案是使用原生查询，但更好的解决方案是 Chad

所建议的

List<HolidaySchedule> findByHDay(String hDay);`

下面的

是此问题的原生查询

public interface HolidayScheduleRepository extends CrudRepository<HolidaySchedule,Long>{

     @Query("SELECT * FROM TWD_HSD_HOLIDAY_SCHEDULE WHERE HSD_DAY = :hday")
    List<HolidaySchedule> findByHDay(@Param("hday) String hday);

}

Answer 3

另一种方法，也适用

存储库：

    public interface HolidayScheduleRepository extends CrudRepository<HolidaySchedule,Long>{

     @Query("SELECT hs FROM HolidaySchedule hs WHERE hs.HDay = ?1")
    List<HolidaySchedule> findByHDay( String hday);

}

在控制器中，jsut @autowired并使用它，它将起作用

参考这个 How do you create a Spring JPA repository findBy query using a property that contains a keyword?

spring boot CrudRepository findby函数无法映射

3 个答案: