Question

我是SpringBoot的新手，目前正在了解使用hibernate的spring应用程序的基本功能。

我有一个包com.yyyyyyyyyyy.com。如果我把所有@Entity定义放在那里，应用程序运行成功。我很高兴能够快速起来跑步。

现在我将一个实体移动到com.yyyyyyyyyyy.y18n.bo，因为它后来应该在别处使用，而且hibernate会抛出以下错误：

Caused by: org.hibernate.AnnotationException: @OneToOne or @ManyToOne on com.yyyyyyyyyyy.coaching.bo.Topic.descriptionStrings references an unknown entity: com.yyyyyyyyyyy.i18n.bo.Localized

（请参阅下面的完整--debug应用程序启动）

我知道@ComponentScan应该用于指定扫描哪些包进行注释。

我仔细检查过javax.persistence.Entity在所有地方使用，而不是hibernate包中的那个。

这是我的程序入口点：

@SpringBootApplication(scanBasePackages={"com.yyyyyyyyyyy"})
//@Configuration
//@ComponentScan(basePackages={"com.yyyyyyyyyyy.coaching", "com.yyyyyyyyyyy.i18n"})
@Import(AppConfig.class)
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

它没有找到带有scanBasePackages的实体，主类上有ComponentScan，也没有使用@Import和另一个配置类“AppConfig”。我也尝试使用ApplicationBuilder而不是SpringApplication，就像这个新的SpringApplicationBuilder（）。sources（AppConfig.class）.main（DemoApplication.class）.run（args）;但无济于事。

我从调试输出中看到的是行：

2015-11-18 08:08:48.407 DEBUG 13780 --- [           main] o.s.b.a.AutoConfigurationPackages        : @EnableAutoConfiguration was declared on a class in the package 'com.yyyyyyyyyyy.coaching'. Automatic @Repository and @Entity scanning is enabled.

我认为这不会受到伤害，因为它来自@SpringBootApplication注释

AppConfig类似乎也没有被包含，因为我添加了未打印的调试输出。

@Configuration
//@Profile("production")
@ComponentScan(basePackages={"com.yyyyyyyyyyy.coaching", "com.yyyyyyyyyyy.i18n"})
public class AppConfig {
    public AppConfig() {
        System.out.println("------------------------------Init AppConfig-------------------------");
    }
    @PostConstruct
    public void doSomething() {
        System.out.println("------------------------------Done AppConfig-------------------------");
    }
}

对此有何帮助/想法？感谢。

编辑，prj结构：

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.3.0.RELEASE)

2015-11-18 08:08:47.048  INFO 13780 --- [           main] c.yyyyyyyyyyy.coaching.DemoApplication   : Starting DemoApplication on Suse with PID 13780 (started by Klaus in C:\Users\Klaus\Downloads\demo (1)\demo)
2015-11-18 08:08:47.051  INFO 13780 --- [           main] c.yyyyyyyyyyy.coaching.DemoApplication   : No profiles are active
2015-11-18 08:08:47.051 DEBUG 13780 --- [           main] o.s.boot.SpringApplication               : Loading source class com.yyyyyyyyyyy.coaching.DemoApplication
2015-11-18 08:08:47.098 DEBUG 13780 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Loaded config file 'classpath:/application.properties'
2015-11-18 08:08:47.098 DEBUG 13780 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped (empty) config file 'classpath:/application.properties' for profile default
2015-11-18 08:08:47.103  INFO 13780 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@1fc32e4f: startup date [Wed Nov 18 08:08:47 CET 2015]; root of context hierarchy
2015-11-18 08:08:47.106 DEBUG 13780 --- [           main] ationConfigEmbeddedWebApplicationContext : Bean factory for org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@1fc32e4f: org.springframework.beans.factory.support.DefaultListableBeanFactory@7a1a3478: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,org.springframework.context.event.internalEventListenerProcessor,org.springframework.context.event.internalEventListenerFactory,demoApplication]; root of factory hierarchy
2015-11-18 08:08:48.286  INFO 13780 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Overriding bean definition for bean 'beanNameViewResolver' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.class]]
2015-11-18 08:08:48.407 DEBUG 13780 --- [           main] o.s.b.a.AutoConfigurationPackages        : @EnableAutoConfiguration was declared on a class in the package 'com.yyyyyyyyyyy.coaching'. Automatic @Repository and @Entity scanning is enabled.
2015-11-18 08:08:48.995  INFO 13780 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [class org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$4e01ef7c] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2015-11-18 08:08:49.038 DEBUG 13780 --- [           main] ationConfigEmbeddedWebApplicationContext : Unable to locate MessageSource with name 'messageSource': using default [org.springframework.context.support.DelegatingMessageSource@2e17a321]
2015-11-18 08:08:49.038 DEBUG 13780 --- [           main] ationConfigEmbeddedWebApplicationContext : Using ApplicationEventMulticaster [org.springframework.context.event.SimpleApplicationEventMulticaster@521bb1a4]
2015-11-18 08:08:49.368 DEBUG 13780 --- [           main] .t.TomcatEmbeddedServletContainerFactory : Code archive: C:\Users\Klaus\.m2\repository\org\springframework\boot\spring-boot\1.3.0.RELEASE\spring-boot-1.3.0.RELEASE.jar
2015-11-18 08:08:49.369 DEBUG 13780 --- [           main] .t.TomcatEmbeddedServletContainerFactory : Code archive: C:\Users\Klaus\.m2\repository\org\springframework\boot\spring-boot\1.3.0.RELEASE\spring-boot-1.3.0.RELEASE.jar
2015-11-18 08:08:49.369 DEBUG 13780 --- [           main] .t.TomcatEmbeddedServletContainerFactory : None of the document roots [src/main/webapp, public, static] point to a directory and will be ignored.
2015-11-18 08:08:49.419  INFO 13780 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2015-11-18 08:08:49.433  INFO 13780 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
2015-11-18 08:08:49.434  INFO 13780 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.0.28
2015-11-18 08:08:49.566  INFO 13780 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2015-11-18 08:08:49.566  INFO 13780 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 2467 ms
[..]
2015-11-18 08:08:49.960  INFO 13780 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'characterEncodingFilter' to: [/*]
2015-11-18 08:08:49.960  INFO 13780 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2015-11-18 08:08:49.961  INFO 13780 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2015-11-18 08:08:49.961  INFO 13780 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'requestContextFilter' to: [/*]
2015-11-18 08:08:49.982 DEBUG 13780 --- [ost-startStop-1] o.s.b.c.web.OrderedRequestContextFilter  : Initializing filter 'requestContextFilter'
2015-11-18 08:08:49.984 DEBUG 13780 --- [ost-startStop-1] o.s.b.c.web.OrderedRequestContextFilter  : Filter 'requestContextFilter' configured successfully
2015-11-18 08:08:49.985 DEBUG 13780 --- [ost-startStop-1] .s.b.c.w.OrderedHttpPutFormContentFilter : Initializing filter 'httpPutFormContentFilter'
2015-11-18 08:08:49.985 DEBUG 13780 --- [ost-startStop-1] .s.b.c.w.OrderedHttpPutFormContentFilter : Filter 'httpPutFormContentFilter' configured successfully
2015-11-18 08:08:49.985 DEBUG 13780 --- [ost-startStop-1] o.s.b.c.w.OrderedHiddenHttpMethodFilter  : Initializing filter 'hiddenHttpMethodFilter'
2015-11-18 08:08:49.985 DEBUG 13780 --- [ost-startStop-1] o.s.b.c.w.OrderedHiddenHttpMethodFilter  : Filter 'hiddenHttpMethodFilter' configured successfully
2015-11-18 08:08:49.985 DEBUG 13780 --- [ost-startStop-1] o.s.b.c.w.OrderedCharacterEncodingFilter : Initializing filter 'characterEncodingFilter'
2015-11-18 08:08:49.985 DEBUG 13780 --- [ost-startStop-1] o.s.b.c.w.OrderedCharacterEncodingFilter : Filter 'characterEncodingFilter' configured successfully
2015-11-18 08:08:50.825  INFO 13780 --- [           main] liquibase                                : Successfully acquired change log lock
2015-11-18 08:08:50.917  INFO 13780 --- [           main] liquibase                                : Reading from broadleaf.DATABASECHANGELOG
2015-11-18 08:08:50.926  INFO 13780 --- [           main] liquibase                                : Successfully released change log lock
2015-11-18 08:08:51.116  INFO 13780 --- [           main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2015-11-18 08:08:51.128  INFO 13780 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [
    name: default
    ...]
2015-11-18 08:08:51.210  INFO 13780 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {4.3.11.Final}
2015-11-18 08:08:51.211  INFO 13780 --- [           main] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
2015-11-18 08:08:51.214  INFO 13780 --- [           main] org.hibernate.cfg.Environment            : HHH000021: Bytecode provider name : javassist
2015-11-18 08:08:51.394  INFO 13780 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {4.0.5.Final}
2015-11-18 08:08:51.441  INFO 13780 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2015-11-18 08:08:51.557  WARN 13780 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
2015-11-18 08:08:51.567  INFO 13780 --- [           main] o.apache.catalina.core.StandardService   : Stopping service Tomcat
2015-11-18 08:08:51.574  INFO 13780 --- [           main] .b.l.ClasspathLoggingApplicationListener : Application failed to start with classpath: [ ...
2015-11-18 08:08:51.578 ERROR 13780 --- [           main] o.s.boot.SpringApplication               : Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1051) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:828) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE]
    at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:347) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:295) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1112) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1101) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE]
    at com.yyyyyyyyyyy.coaching.DemoApplication.main(DemoApplication.java:23) [classes/:na]
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:1249) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.access$600(EntityManagerFactoryBuilderImpl.java:120) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:860) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
    at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
    at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60) ~[spring-orm-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343) ~[spring-orm-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318) ~[spring-orm-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
... 16 common frames omitted
Caused by: org.hibernate.AnnotationException: @OneToOne or @ManyToOne on com.yyyyyyyyyyy.coaching.bo.Topic.descriptionStrings references an unknown entity: com.yyyyyyyyyyy.i18n.bo.Localized

Answer 1

将DemoApplication类移至com.yyyyyyyyyyy包，一切都应该有效。 com.yyyyyyyyyyy中的所有内容都应自动选取。

检查this弹簧引导如何推荐结构化

更新：

也如您在ref文档中看到的那样添加将@EntityScan(basePackages={"com.yyyyyyyyyyy.coaching", "com.yyyyyyyyyyy.i18n"})添加到DemoApplication即可。

Spring @ComponentScan没有被选中，可能是由于@SpringBootApplication中的@EnableAutoConfiguration？

1 个答案: