Python中文网

一个关于 编程问题的解答网站.

有 Java 编程相关的问题?

你可以在下面搜索框中键入要查询的问题!

java ClassNotFoundException在eclipse中突然出现

我正在使用Eclipse3.4.1、jre6、Tomcat6、JSF1.2和RichFaces3。应用程序运行正常,突然在浏览器中产生以下错误

Sorry, a fatal error has occurred. The error has been logged.Please log in again. 

eclipse中的控制台显示:-

SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.ClassNotFoundException: org.college.ui.bean.SearchUserBean
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.apache.myfaces.shared_impl.util.ClassUtils.classForName(ClassUtils.java:141)
at org.apache.myfaces.shared_impl.util.ClassUtils.simpleClassForName(ClassUtils.java:160)
at org.apache.myfaces.shared_impl.util.ClassUtils.newInstance(ClassUtils.java:268)
at org.apache.myfaces.config.ManagedBeanBuilder.buildManagedBean(ManagedBeanBuilder.java:49)
at org.apache.myfaces.el.VariableResolverImpl.resolveVariable(VariableResolverImpl.java:314)
at org.apache.myfaces.trinidadinternal.el.TrinidadVariableResolver.resolveVariable(TrinidadVariableResolver.java:54)
at org.apache.myfaces.el.ValueBindingImpl$ELVariableResolver.resolveVariable(ValueBindingImpl.java:570)
at org.apache.commons.el.NamedValue.evaluate(NamedValue.java:124)
at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:140)
at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:386)
at javax.faces.component.UIOutput.getValue(UIOutput.java:80)
at org.apache.myfaces.shared_impl.renderkit.RendererUtils.getStringValue(RendererUtils.java:223)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.renderInput(HtmlTextRendererBase.java:135)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.encodeEnd(HtmlTextRendererBase.java:53)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:539)
at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(RendererUtils.java:419)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlGridRendererBase.renderChildren(HtmlGridRendererBase.java:229)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlGridRendererBase.encodeEnd(HtmlGridRendererBase.java:101)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:539)
at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(RendererUtils.java:419)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlGridRendererBase.renderChildren(HtmlGridRendererBase.java:229)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlGridRendererBase.encodeEnd(HtmlGridRendererBase.java:101)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:539)
at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(RendererUtils.java:419)
at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChildren(RendererUtils.java:400)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlGroupRendererBase.encodeEnd(HtmlGroupRendererBase.java:78)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:539)
at javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:498)
at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:366)
at org.apache.myfaces.shared_impl.taglib.UIComponentBodyTagBase.doEndTag(UIComponentBodyTagBase.java:57)
at org.apache.jsp.pages.login_jsp._jspx_meth_h_005fpanelGroup_005f0(login_jsp.java:254)
at org.apache.jsp.pages.login_jsp._jspx_meth_h_005fform_005f0(login_jsp.java:199)
at org.apache.jsp.pages.login_jsp._jspx_meth_f_005fview_005f0(login_jsp.java:165)
at org.apache.jsp.pages.login_jsp._jspService(login_jsp.java:129)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:419)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:43)
at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:43)
at org.apache.myfaces.trinidadinternal.context.FacesContextFactoryImpl$OverrideDispatch.dispatch(FacesContextFactoryImpl.java:260)
at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:211)
at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:182)
at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:709)
at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:680)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:60)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)

谢谢你的耐心。请告诉我可能的原因。我检查了我的脸。配置、bean和jsp页面等。一切都很好地绑定。事实上,它工作得很好,突然间产生了一个奇怪而可怕的错误

提前谢谢。请在结束问题或对我如此天真大喊大叫之前回答我


共 (2) 个答案

  1. # 1 楼答案

    这是在eclipse和tomcat中部署应用程序的典型问题。 正如shazin所说,你可以做Project Clean Maven Clean等

    这应该足够了,但对我来说,有时候这并不能解决问题

    如果不起作用,请尝试转到服务器选项卡,右键单击tomcat服务器并进行“清理”。Tomcat将再次发布这些项目

  2. # 2 楼答案

    做一个Project->Clean如果您使用的是Maven,也可以进行Maven清理