‘configurationClass‘ must be assignable to [org.hibernate.cfg.Configuration]

先贴出报错：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'auth2Filter' defined in ServletContext resource [/WEB-INF/applicationContext-authz.xml]: Cannot resolve reference to bean 'oauthService' while setting bean property 'oauthService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'oauthService': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clientDetailsDAO' defined in ServletContext resource [/WEB-INF/applicationContext-dao.xml]: Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/applicationContext-dao.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: 'configurationClass' must be assignable to [org.hibernate.cfg.Configuration]
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1325)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)
    ... 121 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'oauthService': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clientDetailsDAO' defined in ServletContext resource [/WEB-INF/applicationContext-dao.xml]: Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/applicationContext-dao.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: 'configurationClass' must be assignable to [org.hibernate.cfg.Configuration]

我的项目是Eclipse使用JBoss容器启动一个EJB的老项目（jboss-5.1.0.GA、EJB3.0），启动后出现上述报错。通过一天不断尝试错误，本地解决这个问题。

解决方法：项目中新增四个jar包：hibernate-annotations.jar、hibernate-commons-annotations.jar、hibernate-entitymanager.jar、hibernate-validator.jar。（直接从 jboss-5.1.0.GA\common\lib目录中获取）

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如果没有解决你的问题，可以看看下面的分析，或许对你有启发！！！

分析问题：

这个报错是是由hibernate引起，具体原因暂时没有时间去分析，而且设计底层代码，难度也比较大，需要花费大量时间。通过平时做项目的经验，大部分是两个原因：（1）缺少jar包；（2）jar包冲突。经过分析发现，目录 jboss-5.1.0.GA\common\lib 下存在hibernate 的jar包，项目部署的war包中也存在部分hibernate的jar包。

第一步：考虑jar包冲突，删除 jboss-5.1.0.GA\common\lib 中和项目相同的jar包（先备份哈），发现报错更多了，一堆“NoClassDefFoundError”报错，没办法再把删掉的jar包一个一个拷回来。最终又全部拷回来了。（这一步比较花时间，需要耐心！）

第二步：考虑缺少jar包，从 jboss-5.1.0.GA\common\lib 中把项目缺少的相关hibernate的jar包拷贝到项目中。如果有冲突就先删掉，来来回回可能需要尝试几遍。我尝试到这里已经不再报上面的错误。新增的jar包有四个：hibernate-annotations.jar、hibernate-commons-annotations.jar、hibernate-entitymanager.jar、hibernate-validator.jar。

第三步：经过第二步后，还是有报错，又新增了以下jar包：cglib-2.2.jar、asm-3.1.jar。（版本可能需要根据Spring的版本进行调整，我的是Spring3.0.6）

最后算是没有这个报错了。