我正在尝试创建一个 Spring MVC Portlet（版本 3.0.0）以部署在 Weblogic Portal（10.3.2）中，但是当我转到已放置我的 Portlet 的门户页面时出现以下错误：
The portlet "helloWorld" is not available. The portlet class org.springframework.web.portlet.DispatcherPortlet is not found. javax.portlet.UnavailableException: The portlet "helloWorld" is not available. The portlet class org.springframework.web.portlet.DispatcherPortlet is not found.
at com.bea.portlet.container.PortletStub.createPortletInstance(PortletStub.java:1087)
at com.bea.portlet.container.PortletStub.getPortletInstance(PortletStub.java:1020)
at com.bea.portlet.container.PortletStub.init(PortletStub.java:231)
at com.bea.portlet.container.AppContainer.invokeRender(AppContainer.java:972)
at com.bea.netuix.servlets.controls.content.JavaPortletContent.fireRender(JavaPortletContent.java:267)
at com.bea.netuix.servlets.controls.content.JavaPortletContent.renderInternal(JavaPortletContent.java:162)
at com.bea.netuix.servlets.controls.content.JavaPortletContent.beginRender(JavaPortletContent.java:108)
at com.bea.netuix.servlets.controls.application.laf.ContentControlRenderer.beginRender(ContentControlRenderer.java:48)
at com.bea.netuix.nf.ControlLifecycle$7.visit(ControlLifecycle.java:481)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:518)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walk(ControlTreeWalker.java:220)
at com.bea.netuix.nf.Lifecycle.processLifecycles(Lifecycle.java:399)
at com.bea.netuix.nf.Lifecycle.processLifecycles(Lifecycle.java:361)
at com.bea.netuix.nf.Lifecycle.processLifecycles(Lifecycle.java:352)
at com.bea.netuix.nf.Lifecycle.run(Lifecycle.java:326)
at com.bea.netuix.nf.UIControl.render(UIControl.java:582)
at com.bea.netuix.servlets.controls.PresentationContext.render(PresentationContext.java:488)
at com.bea.netuix.servlets.util.RenderToolkit.renderChild(RenderToolkit.java:152)
at com.bea.netuix.servlets.jsp.taglib.skeleton.Child.doTag(Child.java:63)
at jsp_servlet._framework._skeletons._bighorn.__flowlayout._jspService(__flowlayout.java:175)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:502)
at weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImpl.java:429)
at com.bea.netuix.servlets.controls.application.laf.JspTools.renderJsp(JspTools.java:148)
at com.bea.netuix.servlets.controls.application.laf.JspControlRenderer.beginRender(JspControlRenderer.java:72)
at com.bea.netuix.servlets.controls.application.laf.PresentationControlRenderer.beginRender(PresentationControlRenderer.java:65)
at com.bea.netuix.nf.ControlLifecycle$7.visit(ControlLifecycle.java:481)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:518)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walk(ControlTreeWalker.java:220)
at com.bea.netuix.nf.Lifecycle.processLifecycles(Lifecycle.java:399)
at com.bea.netuix.nf.Lifecycle.processLifecycles(Lifecycle.java:361)
at com.bea.netuix.nf.Lifecycle.runOutbound(Lifecycle.java:208)
at com.bea.netuix.nf.Lifecycle.run(Lifecycle.java:162)
at com.bea.netuix.servlets.manager.UIServlet.runLifecycle(UIServlet.java:465)
at com.bea.netuix.servlets.manager.UIServlet.doPost(UIServlet.java:291)
at com.bea.netuix.servlets.manager.UIServlet.doGet(UIServlet.java:231)
at com.bea.netuix.servlets.manager.UIServlet.service(UIServlet.java:216)
at com.bea.netuix.servlets.manager.SingleFileServlet.service(SingleFileServlet.java:275)
at com.bea.netuix.servlets.manager.PortalServlet.service(PortalServlet.java:719)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.bea.p13n.servlets.PortalServletFilter.doFilter(PortalServletFilter.java:336)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.bea.content.manager.servlets.ContentServletFilter.doFilter(ContentServletFilter.java:178)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3592)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2202)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2108)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1432)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
是否可以在 Weblogic Portal 中使用 Spring Portlet MVC，还是我在这里浪费时间？上面看起来有点像 ClassNotFoundException 但我在 portlet 的 WEB-INF/lib 文件夹中有我需要的所有 spring jar，所以我不确定它可能意味着什么。
任何帮助将不胜感激。