春季啓動1.4：類路徑資源[]不能被解析到URL，因爲它不存在

沒有JPA項目正常工作與1.3，但投用1.4以下異常：春季啓動1.4：類路徑資源[]不能被解析到URL，因爲它不存在

2016-07-31_19:29:21.758 [main] ERROR org.springframework.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: Unable to resolve persistence unit root URL 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1076) ~[spring-context-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:851) ~[spring-context-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174) [spring-boot-1.4.0.RELEASE.jar!/:1.4.0.RELEASE] 
    at at.oebb.ticketshop.automat.backend.Application.main(Application.java:21) [classes!/:na] 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_31] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_31] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_31] 
    at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_31] 
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [ts-automat-0.0.1.jar:na] 
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [ts-automat-0.0.1.jar:na] 
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [ts-automat-0.0.1.jar:na] 
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:58) [ts-automat-0.0.1.jar:na] 
Caused by: javax.persistence.PersistenceException: Unable to resolve persistence unit root URL 
    at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.determineDefaultPersistenceUnitRootUrl(DefaultPersistenceUnitManager.java:603) ~[spring-orm-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.preparePersistenceUnitInfos(DefaultPersistenceUnitManager.java:443) ~[spring-orm-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.afterPropertiesSet(DefaultPersistenceUnitManager.java:424) ~[spring-orm-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:310) ~[spring-orm-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:373) ~[spring-orm-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:362) ~[spring-orm-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    ... 24 common frames omitted 
Caused by: java.io.FileNotFoundException: class path resource [] cannot be resolved to URL because it does not exist 
    at org.springframework.core.io.ClassPathResource.getURL(ClassPathResource.java:187) ~[spring-core-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.determineDefaultPersistenceUnitRootUrl(DefaultPersistenceUnitManager.java:600) ~[spring-orm-4.3.1.RELEASE.jar!/:4.3.1.RELEASE] 
    ... 31 common frames omitted

來源

2016-07-31 Andras Hatvani

@EnableAutoConfiguration(exclude = HibernateJpaAutoConfiguration.class) 必須在應用程序類中設置，並且必須在應用程序屬性/ yml中設置 spring.data.jpa.repositories.enabled=false。

來源

2016-08-01 11:49:03

如果它不起作用，只需更新您的SpringBoot到1.4.1.BUILD-SNAPSHOT。

同樣的問題： https://github.com/spring-projects/spring-boot/issues/6314

來源

2016-09-19 02:50:14 absurd

我更新到1.4.1.RELEASE，仍然有問題。它對你有用嗎？ – pegasus

如果您沒有使用@entity註釋的類，則可以使用spring boot jdbc starter而不是jpa –

這發生在春季啓動1.4版時，你有你的依賴彈簧數據JPA罐子和你有你的項目，@entity註解無類。

爲了解決這個問題，您可以在您的pom文件中使用jdbc starter而不是jpa。

<dependency> 
    <groupId>org.springframework.boot</groupId> 
    <artifactId>spring-boot-starter-jdbc</artifactId> 
</dependency>

來源

2016-10-25 17:46:18

春季啓動1.4：類路徑資源[]不能被解析到URL，因爲它不存在

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