Spring Boot：+ Spring Data Rest：在类路径资源中定义名称为“entityManagerFactory”的 bean 创建时出错

Martin 发表于 Dev

马丁

我是这一切的初学者，我不明白为什么一旦我将 spring-boot-starter-data-rest 添加到我的依赖项中，我的项目就不再编译。我正在使用 Spring Boot、Thymeleaf 和 H2。任何帮助都受到高度赞赏。

这是错误消息：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/orm/hibernate5/SpringBeanContainer
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:625) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:605) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1083) ~[spring-context-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:853) ~[spring-context-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) ~[spring-context-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at com.schnitzel.hunt.AppConfig.main(AppConfig.java:15) [main/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/orm/hibernate5/SpringBeanContainer
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:620) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    ... 19 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/orm/hibernate5/SpringBeanContainer
    at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration.lambda$determineHibernatePropertiesCustomizers$0(HibernateJpaConfiguration.java:119) ~[spring-boot-autoconfigure-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties.lambda$getAdditionalProperties$0(HibernateProperties.java:109) ~[spring-boot-autoconfigure-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1378) ~[na:na]
    at org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties.getAdditionalProperties(HibernateProperties.java:109) ~[spring-boot-autoconfigure-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties.determineHibernateProperties(HibernateProperties.java:91) ~[spring-boot-autoconfigure-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration.getVendorProperties(HibernateJpaConfiguration.java:138) ~[spring-boot-autoconfigure-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.entityManagerFactory(JpaBaseConfiguration.java:138) ~[spring-boot-autoconfigure-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$44b50107.CGLIB$entityManagerFactory$4(<generated>) ~[spring-boot-autoconfigure-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$44b50107$$FastClassBySpringCGLIB$$11c968a.invoke(<generated>) ~[spring-boot-autoconfigure-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$44b50107.entityManagerFactory(<generated>) ~[spring-boot-autoconfigure-2.1.0.RELEASE.jar:2.1.0.RELEASE]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.2.RELEASE.jar:5.1.2.RELEASE]
    ... 20 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.orm.hibernate5.SpringBeanContainer
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582) ~[na:na]
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190) ~[na:na]
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499) ~[na:na]

这是我的依赖块

dependencies {

    compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-rest', version: '2.1.0.RELEASE'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version: '2.0.6.RELEASE'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: '2.0.5.RELEASE'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-thymeleaf', version: '2.0.5.RELEASE'
    compile group: 'com.h2database', name: 'h2', version: '1.4.197'
    compile group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.1'
    compile group: 'org.javassist', name: 'javassist', version: '3.23.1-GA'
    testCompile group: 'junit', name: 'junit', version: '4.12'

}

这是我的 AppConfig 的主要方法

@SpringBootApplication

public class AppConfig {

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

编辑：包结构

我不确定向您展示包结构的最佳方式是什么，所以我做了一个截图。

封装结构

索达拉

当库版本出现问题时，可能会出现 ClassNotFoundException 或 NotSuchMethodException 等异常。这里有几个版本的 spring。它们并非都彼此兼容。

最简单的方法是使用 Spring Initializr 网站来获得正确的依赖项。

在您的情况下，您可以降级 spring-boot-starter-data-rest 版本并使用与 spring-boot-starter-data-jpa 相同的版本。或者做相反的事情：增加版本。就我而言，我将对所有 spring 依赖项使用相同的版本号

希望能帮助到你

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编辑于 2021-07-7

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