spring + hibernate class not found

我有一个简单的web应用程序，我试图运行并遇到问题。我将Java EE 6应用程序迁移到Spring。看来hibernate开始很好，但是当Spring试图创建一个指向实体的命名bean时，我得到了ClassNotFoundException。spring + hibernate class not found

任何想法为什么在WAR的WEB-INF/lib中的jar没有被spring看到？我有某种代理问题？

让我知道你想看到什么文件的片段，如果有的话。

编辑：附加堆栈跟踪 - 我修改了堆栈跟踪中的全限定类名称以简化操作。我还附加了我的弹簧豆配置。此外，FYI，我的实体类都在不同的jar文件（按设计）。我相信这是造成一些问题，但我不知道为什么。

n]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: api/model/principal/Group 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1011) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:957) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:490) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:626) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479) 
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389) 
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294) 
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112) 
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791) 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) 
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) 
    at java.util.concurrent.FutureTask.run(FutureTask.java:166) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:722) 
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [server.administration.GroupExampleBean]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: api/model/principal/Group 
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163) 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1004) 
    ... 23 more 
Caused by: java.lang.NoClassDefFoundError: api/model/principal/Group 
    at server.administration.GroupExampleBean.<init>(GroupExampleBean.java:20) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525) 
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148) 
    ... 25 more 
Caused by: java.lang.ClassNotFoundException: api.model.principal.Group 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714) 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559) 
    ... 31 more

我的Spring应用程序上下文：

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
      xmlns:context="http://www.springframework.org/schema/context" 
      xmlns:tx="http://www.springframework.org/schema/tx" 
      xmlns:jdbc="http://www.springframework.org/schema/jdbc" 
      xmlns:jpa="http://www.springframework.org/schema/jpa" 
      xsi:schemaLocation="http://www.springframework.org/schema/beans 
      http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
      http://www.springframework.org/schema/context 
      http://www.springframework.org/schema/context/spring-context-3.2.xsd 
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd 
        http://www.springframework.org/schema/jdbc 
        http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd 
        http://www.springframework.org/schema/jpa 
        http://www.springframework.org/schema/jpa/spring-jpa-3.2.xsd"> 
    <jpa:repositories base-package="examples" /> 
    <context:component-scan base-package="examples"/> 
    <context:annotation-config/> 

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="dataSource" ref="dataSource"/> 
     <property name="jpaVendorAdapter"> 
      <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
       <property name="generateDdl" value="true" /> 
       <property name="database" value="HSQL" /> 
       <property name="databasePlatform" value="org.hibernate.dialect.HSQLDialect" /> 
      </bean> 
     </property> 
     <property name="persistenceUnitName" value="persistenceUnit" /> 
    </bean> 

    <bean id="transactionMa## Heading ##nager" class="org.springframework.orm.jpa.JpaTransactionManager"> 
     <!--<property name="entityManagerFactory" ref="entityManagerFactory"/>--> 
    </bean> 

    <!-- 
    can be: HSQL/H2/Derby 
    --> 
    <jdbc:embedded-database id="dataSource" type="HSQL"/> 

    <tx:annotation-driven transaction-manager="transactionManager" /> 

    <!-- For some reason the annotations are not being picked up yet --> 
    <!--<bean id="startupListener" class="examples.web.application.StartupListener"/>--> 

    <!-- Spring will manage the JPA Listeners 
    <jpa:auditing auditor-aware-ref="auditorAware" /> 
    <bean id="auditorAware" class="org.springframework.data.jpa.example.auditing.AuditorAwareImpl" /> 
    --> 

    <!-- 
    <jpa:repositories base-package="org.springframework.data.jpa.example.repository.simple" /> 
    --> 
</beans>

感谢，

沃尔特

来源

2013-02-25 Walter

检查，看看是否WEB-INF/lib目录中的内容被捆绑到你的战争或移动到您从开始展开的目录。 – duffymo 2013-02-25 20:11:10

什么是完整的堆栈跟踪和错误消息？通常这个消息告诉你哪个类找不到。 – beny23 2013-02-25 20:16:50

我已经检查过WAR文件，它们在那里。然而，在查看了hibernate的日志之后，由于检测注释类的启动时间是0ms，所以它没有出现hibernate检测到的任何实体。我没有进一步检查休眠。 – Walter 2013-02-25 20:31:44

我想通了，我在我的persistence.xml指向外部罐子来指定。

沃尔特

来源

2013-03-04 20:19:35 Walter

spring + hibernate class not found

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