這幾天一直被這個問題困擾，Spring boot啟動沒報錯，就是掃描不到需要注冊的類。今天終于發現，Spring boot的啟動類需要放在需要掃描類的上層目錄，這樣才能掃描到同級或者子類需要注冊的類。 但是在網上我發現一個其他問題，有人說用 @ComponentScan直接寫需要掃描類的路徑，但是我試驗一直沒成功。不知道為什么，麻煩幫忙看下！ 剛接觸spring boot 先謝謝各位了 。
下圖是我要掃描的dao和service，但是啟動后一直報錯。報的錯一看就是沒掃描到類ReadingListRepository，這個類繼承JpaRepository
2017-04-25 22:45:57.349 WARN 7864 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'readingListController': Unsatisfied dependency expressed through field 'readingListRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.dawn.oket.dao.ReadingListRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2017-04-25 22:45:57.349 INFO 7864 --- [ main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2017-04-25 22:45:57.349 INFO 7864 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000227: Running hbm2ddl schema export
2017-04-25 22:45:57.349 INFO 7864 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
2017-04-25 22:45:57.359 INFO 7864 --- [ main] o.apache.catalina.core.StandardService : Stopping service Tomcat
2017-04-25 22:45:57.399 INFO 7864 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-04-25 22:45:57.681 ERROR 7864 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field readingListRepository in org.dawn.oket.service.ReadingListController required a bean of type 'org.dawn.oket.dao.ReadingListRepository' that could not be found.
Action:
Consider defining a bean of type 'org.dawn.oket.dao.ReadingListRepository' in your configuration.
Disconnected from the target VM, address: '127.0.0.1:52934', transport: 'socket'
Process finished with exit code 1
uj5u.com熱心網友回復：
這個注解掃描該類同級包下的類以及子包的類，如果有其他不同父子級的包，可以使用basePackage指定具體的包，推薦將啟動類放在最上層的包中uj5u.com熱心網友回復：
請問樓主這個問題解決了嗎？我也遇到這個問題了。弄了好幾天了。網上說的檔案夾位置，掃描類這些方法都試過了。還是不行uj5u.com熱心網友回復：
@EnableJpaRepositoriesuj5u.com熱心網友回復：
Repository類，加注解：@Repositoryuj5u.com熱心網友回復：
把你的啟動類放在最上層的包中uj5u.com熱心網友回復：
ReadingListRepository這個寫成普通的java 類，不要用介面，然后在類上面加上@Service就可以了uj5u.com熱心網友回復：
application不要寫在common里面，拿出來寫uj5u.com熱心網友回復：
位置放錯了，@ComponentScan 放在@SpringBootApplication 上面就行了uj5u.com熱心網友回復：
沒加注解沒加注解uj5u.com熱心網友回復：
@ComponentScan指定basePackages了還是沒有，轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/72998.html
標籤：Java相關