java.lang.NoClassDefFoundError:javax/faces/FacesException

Question

我正在尝试将从Eclipse工作区导入的Web应用程序部署到NetBeans.但它没有部署,而是给了我以下的例外.

15 Jul, 2011 5:59:04 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.apache.myfaces.component.html.util.StreamingDestroyerListener
java.lang.NoClassDefFoundError: javax/faces/FacesException
        at org.apache.myfaces.shared_tomahawk.config.MyfacesConfig.<clinit>(MyfacesConfig.java:80)
        at org.apache.myfaces.component.html.util.StreamingDestroyerListener.contextInitialized(StreamingDestroyerListener.java:32)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:521)
        at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1359)
        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 org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:297)
        **at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)
        at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)**
        at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1500)
        at org.apache.catalina.manager.ManagerServlet.deploy(ManagerServlet.java:849)
        at org.apache.catalina.manager.ManagerServlet.doGet(ManagerServlet.java:351)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        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.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:199)
        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.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:558)
        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:298)
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
        **at java.lang.Thread.run(Thread.java:619)**

我错过了一些JAR吗？

Answer 1

这NoClassDefFoundError意味着在编译期间类存在于类路径中.Tomahawk import javax.faces.FacesException;在代码库中占有一席之地.这是核心JSF API的一个类.

这意味着webapp的类路径中缺少JSF库.该项目在Netbeans中显然与已经捆绑了JSF的服务器相关联,例如Glassfish,JBoss AS等.Eclipse中的项目似乎与服务器没有正确关联,或者有问题的服务器没有捆绑的JSF如雄猫,码头等

stacktrace暗示您正在使用Tomcat.您需要单独下载 JSF并将JAR文件放在webapp中/WEB-INF/lib(您的Tomahawk库也在那里).

Answer 2

是的，CNF 异常总是意味着缺少 JAR。类加载器找不到这个：

javax.faces.FacesException

您可以通过将类名剪切并粘贴到findjar.com中来找到它，如下所示：

http://www.findjar.com/index.x?query=javax.faces.FacesException