Liferay ClassNotFoundException：DLFileEntryImpl
在我的6.1.0门户实例上使用6.1.0 SDK-Portlet，它使用ServiceBuilder和DL-Api这一行：
DynamicQuery query = DynamicQueryFactoryUtil.forClass(DLFileEntry.class) 产生此错误：
16:46:46,319 ERROR [DynamicQueryFactoryImpl:83] Unable find model com.liferay.portlet.documentlibrary.model.impl.DLFileEntryImpl java.lang.ClassNotFoundException: com.liferay.portlet.documentlibrary.model.impl.DLFileEntryImpl at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1688) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1533) at com.liferay.portal.dao.orm.hibernate.DynamicQueryFactoryImpl.getImplClass(DynamicQueryFactoryImpl.java:78) at com.liferay.portal.dao.orm.hibernate.DynamicQueryFactoryImpl.getImplClass(DynamicQueryFactoryImpl.java:59) at com.liferay.portal.dao.orm.hibernate.DynamicQueryFactoryImpl.forClass(DynamicQueryFactoryImpl.java:33) at com.liferay.portal.kernel.dao.orm.DynamicQueryFactoryUtil.forClass(DynamicQueryFactoryUtil.java:23) at de.acocon.liferay.service.service.bean.DocLibBean.findByExtraSettings(DocLibBean.java:403) at de.acocon.liferay.service.service.bean.DocLibBean.findByIdeaId(DocLibBean.java:395) at de.acocon.liferay.service.service.bean.DocLibBean.fillUploadedFileListByIdea(DocLibBean.java:417) at de.acocon.liferay.service.service.bean.IdeaController.init(IdeaController.java:149) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.sun.faces.vendor.WebContainerInjectionProvider.invokeAnnotatedMethod(WebContainerInjectionProvider.java:117) at com.sun.faces.vendor.WebContainerInjectionProvider.invokePostConstruct(WebContainerInjectionProvider.java:99) at com.sun.faces.mgbean.BeanBuilder.invokePostConstruct(BeanBuilder.java:223) at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:105) at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409) at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269) 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.ELText$ELTextVariable.writeText(ELText.java:224) at com.sun.faces.facelets.compiler.TextInstruction.write(TextInstruction.java:85) at com.sun.faces.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:82) at com.sun.faces.facelets.compiler.UILeaf.encodeAll(UILeaf.java:183) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1759) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1759) at org.icefaces.impl.context.DOMPartialViewContext.processPartial(DOMPartialViewContext.java:153) at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183) at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183) at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:981) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1756) at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:390) at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131) at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121) 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.lifecycle.LifecycleWrapper.render(LifecycleWrapper.java:45) at com.liferay.faces.bridge.BridgePhaseResourceImpl.execute(BridgePhaseResourceImpl.java:115) at com.liferay.faces.bridge.BridgeImpl.doFacesRequest(BridgeImpl.java:115) at javax.portlet.faces.GenericFacesPortlet.serveResource(GenericFacesPortlet.java:178) at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:118) at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:71) at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:93) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 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:72) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:70) 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:684) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329) at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:634) at com.liferay.portlet.InvokerPortletImpl.invokeResource(InvokerPortletImpl.java:746) at com.liferay.portlet.InvokerPortletImpl.serveResource(InvokerPortletImpl.java:503) at com.liferay.portal.action.LayoutAction.processPortletRequest(LayoutAction.java:941) at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:664) at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:244) 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:174) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:533) at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:510) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 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:72) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:113) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:113) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:113) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121) at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:201) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121) at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:240) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:70) 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:684) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329) at com.liferay.portal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:135) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 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:72) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:113) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:113) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121) at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:123) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121) at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:201) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121) at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:241) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121) at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:240) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121) at com.liferay.portal.servlet.filters.sso.ntlm.NtlmPostFilter.processFilter(NtlmPostFilter.java:83) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121) at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:80) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121) at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:208) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:184) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:92) at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:164) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:92) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:164) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:92) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:184) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:92) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:70) 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:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:680)
我搜索了几个小时的原因，但我没找到它。 我也尝试将portal-impl.jar添加到我的lib /文件夹中，但这没有帮助，也不好;）
请说我应该使用新版本，因为我无法改变它 – >客户为王
谢谢你的帮助！
它似乎是一个classLoader问题，在liferay中有不同的类加载器（粗略解释）：
- 插件类加载器：加载插件的类，即从’/ my-portlet / WEB-INF / lib /’
- Portal类加载器：从
portal-impl.jar加载门户类 - 全局类加载器：加载服务器类，即
../tomcat-7.0.27/lib/ext/类
因此，有不同的方法可以将DynamicQuery类从一个classLoader加载到另一个classLoader中。
以下是根据实现类所在的位置使用DynamicQuery方法：
-
如果Implementation类在您的自定义portlet中，那么：不要使用特殊的类加载器 – 它应该是开箱即用的。
-
如果Implementation类是门户网站的一部分（即来自
portal-impl.jar如User，Role或Group或者就像你的DLFileEntry），那么使用以下命令：Classloader loader = PortalClassLoaderUtil.getClassLoader(); DynamicQuery query = DynamicQueryFactoryUtil.forClass(DLFileEntry.class, loader); -
如果实现类在另一个portlet中，则使用以下命令：
ClassLoader classLoader = (ClassLoader) PortletBeanLocatorUtil.locate(ClpSerializer.SERVLET_CONTEXT_NAME,"portletClassLoader"); DynamicQuery query = DynamicQueryFactoryUtil.forClass(DLFileEntry.class, classLoader);
所以回答你的问题 ：第二种方法应该适合你。
从Liferay论坛post转载的信息
请尝试以下代码：
DynamicQuery query = DynamicQueryFactoryUtil.forClass(DLFileEntry.class, DLFileEntry.class.getClassLoader());
对我来说它有效。
在我的例子中，我们使用自定义表。 每当我尝试从EntityServiceImpl类中获取数据时，我都会收到同样的错误。 实体是我桌子的名称。 在这里，我们揭露了我们的生活服务。 使用代码解决问题
ClassLoader classLoader = (ClassLoader) PortletBeanLocatorUtil.locate(ClpSerializer.getServletContextName(),"portletClassLoader"); DynamicQuery query = DynamicQueryFactoryUtil.forClass(Entity.class, classLoader);
但是使用ClpSerializer.getServletContextName（）而不是ClpSerializer.SERVLET_CONTEXT_NAME。 如kgiannakakis所述。