休眠-未找到类

我有Hibernate的典型初学者问题-即使我在cfg.xml中生成并映射了实体，也找不到类。这是日志：

com.sun.faces.mgbean.ManagedBeanCreationException: An error occurred performing resource injection on managed bean pickListView
    at com.sun.faces.mgbean.BeanBuilder.invokePostConstruct(BeanBuilder.java:229)
    at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:105)
    at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:408)
    at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:268)
    at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244)
    at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)
    at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
    at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
    at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44)
    at org.jboss.el.parser.AstValue.getValue(AstValue.java:63)
    at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182)
    at javax.faces.component.UIOutput.getValue(UIOutput.java:170)
    at javax.faces.component.UIInput.getValue(UIInput.java:284)
    at org.primefaces.component.picklist.PickListRenderer.encodeMarkup(PickListRenderer.java:66)
    at org.primefaces.component.picklist.PickListRenderer.encodeEnd(PickListRenderer.java:59)
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:881)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1786)
    at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:851)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:439)
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:124)
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286)
    at com.liferay.faces.bridge.application.ViewHandlerCompatImpl.renderView(ViewHandlerCompatImpl.java:52)
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
    at com.liferay.faces.bridge.BridgePhaseRenderImpl.execute(BridgePhaseRenderImpl.java:227)
    at com.liferay.faces.bridge.BridgePhaseRenderImpl.execute(BridgePhaseRenderImpl.java:85)
    at com.liferay.faces.bridge.BridgeImpl.doFacesRequest(BridgeImpl.java:112)
    at javax.portlet.faces.GenericFacesPortlet.doView(GenericFacesPortlet.java:255)
    at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:328)
    at javax.portlet.faces.GenericFacesPortlet.doDispatch(GenericFacesPortlet.java:204)
    at javax.portlet.GenericPortlet.render(GenericPortlet.java:233)
    at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:103)
    at com.liferay.portlet.ScriptDataPortletFilter.doFilter(ScriptDataPortletFilter.java:55)
    at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:100)
    at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:64)
    at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:112)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:96)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:605)
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:544)
    at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:583)
    at com.liferay.portlet.InvokerPortletImpl.invokeRender(InvokerPortletImpl.java:656)
    at com.liferay.portlet.InvokerPortletImpl.render(InvokerPortletImpl.java:362)
    at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(render_005fportlet_jsp.java:1233)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at com.liferay.portal.servlet.DirectRequestDispatcher.include(DirectRequestDispatcher.java:57)
    at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.doDispatch(ClassLoaderRequestDispatcherWrapper.java:78)
    at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.include(ClassLoaderRequestDispatcherWrapper.java:53)
    at com.liferay.portlet.PortletContainerImpl._doRender(PortletContainerImpl.java:655)
    at com.liferay.portlet.PortletContainerImpl.render(PortletContainerImpl.java:138)
    at com.liferay.portlet.SecurityPortletContainerWrapper.render(SecurityPortletContainerWrapper.java:141)
    at com.liferay.portlet.RestrictPortletContainerWrapper.render(RestrictPortletContainerWrapper.java:126)
    at com.liferay.portal.kernel.portlet.PortletContainerUtil.render(PortletContainerUtil.java:156)
    at com.liferay.portal.layoutconfiguration.util.PortletRenderer._render(PortletRenderer.java:125)
    at com.liferay.portal.layoutconfiguration.util.PortletRenderer.render(PortletRenderer.java:72)
    at com.liferay.portal.layoutconfiguration.util.RuntimePageImpl.doProcessTemplate(RuntimePageImpl.java:452)
    at com.liferay.portal.layoutconfiguration.util.RuntimePageImpl.doDispatch(RuntimePageImpl.java:284)
    at com.liferay.portal.layoutconfiguration.util.RuntimePageImpl.processTemplate(RuntimePageImpl.java:113)
    at com.liferay.portal.layoutconfiguration.util.RuntimePageImpl.processTemplate(RuntimePageImpl.java:124)
    at com.liferay.portal.layoutconfiguration.util.RuntimePageUtil.processTemplate(RuntimePageUtil.java:69)
    at org.apache.jsp.html.portal.layout.view.portlet_jsp._jspService(portlet_jsp.java:556)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:96)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:605)
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:544)
    at com.liferay.portal.action.LayoutAction.includeLayoutContent(LayoutAction.java:302)
    at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:405)
    at com.liferay.portal.action.LayoutAction.doExecute(LayoutAction.java:200)
    at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:95)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
    at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:178)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:549)
    at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:526)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:293)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.jsoncontenttype.JSONContentTypeFilter.processFilter(JSONContentTypeFilter.java:42)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:96)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
    at com.liferay.portal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:156)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:359)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:123)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:293)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:243)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.jsoncontenttype.JSONContentTypeFilter.processFilter(JSONContentTypeFilter.java:42)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:267)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.sso.ntlm.NtlmPostFilter.processFilter(NtlmPostFilter.java:83)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:88)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
    at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:226)
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:185)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
    at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:165)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:165)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:185)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:96)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: com.sun.faces.spi.InjectionProviderException
    at com.sun.faces.vendor.WebContainerInjectionProvider.invokeAnnotatedMethod(WebContainerInjectionProvider.java:115)
    at com.sun.faces.vendor.WebContainerInjectionProvider.invokePostConstruct(WebContainerInjectionProvider.java:95)
    at com.sun.faces.mgbean.BeanBuilder.invokePostConstruct(BeanBuilder.java:223)
    ... 201 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.sun.faces.vendor.WebContainerInjectionProvider.invokeAnnotatedMethod(WebContainerInjectionProvider.java:113)
    ... 203 more
Caused by: org.hibernate.MappingException: entity class not found: Kat
    at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:138)
    at org.hibernate.tuple.PropertyFactory.getGetter(PropertyFactory.java:497)
    at org.hibernate.tuple.PropertyFactory.buildIdentifierAttribute(PropertyFactory.java:87)
    at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:163)
    at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:520)
    at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:148)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163)
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135)
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:401)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1859)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1930)
    at org.hzzo.beans.PickListView.fetchData(PickListView.java:129)
    at org.hzzo.beans.PickListView.init(PickListView.java:31)
    ... 208 more
Caused by: java.lang.ClassNotFoundException: Kat
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at org.hibernate.internal.util.ReflectHelper.classForName(ReflectHelper.java:193)
    at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:133)
    ... 224 more

方法中的代码：

     Configuration cfg = new Configuration();
     cfg.configure("hibernate.cfg.xml"); // populates the data of the
                                         // configuration file

     // creating seession factory object
     SessionFactory factory = cfg.buildSessionFactory();

     // creating session object
     Session session = factory.openSession();

     // creating transaction object
     Transaction t = session.beginTransaction();

     Query query = session.createQuery("from Kat");                
     List<Kat> list = query.list();
     for (Kat l : list) {
         System.out.println("ID: " + l.getId());
     }

     t.commit();
     session.close();

     return list;

我已经开始使用具有许多表的数据库，但是在犯了这个错误之后，我试图使其变得更简单，所以现在我只尝试了一个表。不知道我在做什么错。这是我的配置文件：

hibernate.cfg.xml文件：

<hibernate-configuration>
 <session-factory name="">
  <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
  <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/eu</property>
  <property name="hibernate.connection.username">root</property>
  <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
  <mapping class="org/hzzo/hibernate/Kat" package="org/hzzo/hibernate" resource="org/hzzo/hibernate/Kat.hbm.xml"/>
 </session-factory>
</hibernate-configuration>

我已经通过教程完成了所有工作，创建了类，创建了配置文件，这是库列表：

• antlr.jar
• cglib-nodep.jar
• dom4j.jar
• hibernate-commons-annotations.jar
• hibernate-core.jar
• hibernate-jpa-jar
• jandex.jar
• javassist.jar
• jboss-logging.jar
• jboss-logging-annotations.jar
• jboss-transaction-api.jar

有什么建议？

编辑：这是我的Kat.hbm.xml文件：

<hibernate-mapping>
    <class name="Kat" table="kat" catalog="eu">
        <id name="id" type="int">
            <column name="id" />
            <generator class="assigned" />
        </id>
        <property name="naziv" type="string">
            <column name="naziv" length="30" />
        </property>
        <property name="cijena" type="string">
            <column name="cijena" length="40" />
        </property>
    </class>
</hibernate-mapping>