spring + hibernate class not found

我有一個簡單的web應用程序，我試圖運行並遇到問題。我將Java EE 6應用程序遷移到Spring。看來hibernate開始很好，但是當Spring試圖創建一個指向實體的命名bean時，我得到了ClassNotFoundException。spring + hibernate class not found

任何想法爲什麼在WAR的WEB-INF/lib中的jar沒有被spring看到？我有某種代理問題？

讓我知道你想看到什麼文件的片段，如果有的話。

編輯：附加堆棧跟蹤 - 我修改了堆棧跟蹤中的全限定類名稱以簡化操作。我還附加了我的彈簧豆配置。此外，FYI，我的實體類都在不同的jar文件（按設計）。我相信這是造成一些問題，但我不知道爲什麼。

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應用程序上下文：

<?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>

感謝，

沃爾特

來源

2013-02-25 Walter

檢查，看看是否WEB-INF/lib目錄中的內容被捆綁到你的戰爭或移動到您從開始展開的目錄。 – duffymo 2013-02-25 20:11:10

什麼是完整的堆棧跟蹤和錯誤消息？通常這個消息告訴你哪個類找不到。 – beny23 2013-02-25 20:16:50

我已經檢查過WAR文件，它們在那裏。然而，在查看了hibernate的日誌之後，由於檢測註釋類的啓動時間是0ms，所以它沒有出現hibernate檢測到的任何實體。我沒有進一步檢查休眠。 – Walter 2013-02-25 20:31:44

我想通了，我在我的persistence.xml指向外部罐子來指定。

沃爾特

來源

2013-03-04 20:19:35 Walter

spring + hibernate class not found

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