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Spring Data Jpa入门

分类: 技术问答 • 2022-06-10 14:50:32
问题描述：

我有一个下面的项目结构。Spring Data Jpa入门

enter image description here

，我有一个主弹簧引导应用类，如下

@SpringBootApplication 
@ComponentScan(basePackages={"com.portal.*"}) 
@EnableJpaRepositories(basePackages={"com.portal.repository"}) 
public class Application { 

    @Autowired 
    private ResourceDataService resourceDataService; 
    public static void main(String[] args) { 
     SpringApplication.run(Application.class, args); 
    } 

    @RequestMapping("/") 
    public void list(){ 

     resourceDataService.find(); 
    } 

}

和支持类是如下

@Service 
public class ResourceDataService { 

    private CalenderRepo resourceRepo; 

    @Autowired 
    public ResourceDataService(CalenderRepo resourceRepo){ 
     this.resourceRepo = resourceRepo; 
    } 

    public void find(){ 
     resourceRepo.findAll(); 
    } 


@Repository 
public interface CalenderRepo extends CrudRepository<Calendar, Long> { 

    Calendar findOneByCalendarMonth(String calendar_Month); 
}

它抛出一个低于错误。

[main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'application': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.portal.services.ResourceDataService main.Application.resourceDataService; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'resourceDataService' defined in file [C:\Users\M1023004\workspaceNew\MongoLab\Project\target\classes\com\portal\services\ResourceDataService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.portal.repository.CalenderRepo]: : Error creating bean with name 'calenderRepo': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not an managed type: class java.util.Calendar; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'calenderRepo': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not an managed type: class java.util.Calendar

有人可以帮我解决这个错误。

此外，如果你有任何良好的春季资料jpa的参考文件，请在这里分享。

编辑-1：

我已经将application.java移动到com.portal。我提示以下错误：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'application': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.portal.services.ResourceDataService com.portal.Application.resourceDataService; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'resourceDataService' defined in file [C:\Users\M1023004\workspaceNew\MongoLab\Project\target\classes\com\portal\services\ResourceDataService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.portal.repository.CalenderRepo]: : Error creating bean with name 'calenderRepo': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property calendarMonth found for type Calendar! Did you mean 'Calendar_Month','calendar_Month'?; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'calenderRepo': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property calendarMonth found for type Calendar! Did you mean 'Calendar_Month','calendar_Month'? 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) ~[spring-context-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE] 
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:764) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE] 
    at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:357) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:305) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1124) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1113) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE] 
    at com.portal.Application.main(Application.java:18) [classes/:na] 
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.portal.services.ResourceDataService com.portal.Application.resourceDataService; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'resourceDataService' defined in file [C:\Users\M1023004\workspaceNew\MongoLab\Project\target\classes\com\portal\services\ResourceDataService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.portal.repository.CalenderRepo]: : Error creating bean with name 'calenderRepo': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property calendarMonth found for type Calendar! Did you mean 'Calendar_Month','calendar_Month'?; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'calenderRepo': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property calendarMonth found for type Calendar! Did you mean 'Calendar_Month','calendar_Month'? 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    ... 17 common frames omitted 
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'resourceDataService' defined in file [C:\Users\M1023004\workspaceNew\MongoLab\Project\target\classes\com\portal\services\ResourceDataService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.portal.repository.CalenderRepo]: : Error creating bean with name 'calenderRepo': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property calendarMonth found for type Calendar! Did you mean 'Calendar_Month','calendar_Month'?; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'calenderRepo': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property calendarMonth found for type Calendar! Did you mean 'Calendar_Month','calendar_Month'? 
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1192) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    ... 19 common frames omitted 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'calenderRepo': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property calendarMonth found for type Calendar! Did you mean 'Calendar_Month','calendar_Month'? 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1192) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    ... 32 common frames omitted 
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property calendarMonth found for type Calendar! Did you mean 'Calendar_Month','calendar_Month'? 
    at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:75) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:327) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:307) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:270) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:241) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.repository.query.parser.Part.<init>(Part.java:76) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:235) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.repository.query.parser.PartTree$Predicate.buildTree(PartTree.java:373) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:353) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:87) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:61) ~[spring-data-jpa-1.9.2.RELEASE.jar:na] 
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:95) ~[spring-data-jpa-1.9.2.RELEASE.jar:na] 
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:206) ~[spring-data-jpa-1.9.2.RELEASE.jar:na] 
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:73) ~[spring-data-jpa-1.9.2.RELEASE.jar:na] 
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:416) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:206) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:251) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:237) ~[spring-data-commons-1.11.2.RELEASE.jar:na] 
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:92) ~[spring-data-jpa-1.9.2.RELEASE.jar:na] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    ... 43 common frames omitted
+1

我建议你将你的'Application'到'com.portal'并删除所有注释，但' @ SpringBootApplication'。这将自动启用您需要的所有功能，将其移动到另一个软件包会使事情难以发挥作用。 –

+0

我已经试过你的方式..仍然没有运气..我编辑我的帖子。 – Geek

+1

而不是张贴片段，发布完整的堆栈跟踪。该消息是清楚顺便说一句，你正在使用错误的'日历'你使用'java.util.Calendar'而不是你自己的类型 - >'不是一个托管类型：类java.util.Calendar'修复你的回购定义。 –

答

在CalenderRepo您使用java.util.Calendar代替com.portal.model.Calendar。导入正确的类。

+0

为什么downvote？ – qtips

+1

很好的答案+1兄弟:) – ozgur

+0

@jackk感谢您的鼓励:) – qtips

答 

public interface CalenderRepo extends CrudRepository<Calendar, Long>

你错了进口类：类java.util.Calendar

修正：

public interface CalenderRepo extends CrudRepository<com.portal.model.Calendar, Long>

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