java.lang.NoClassDefFoundError: javax/el/ExpressionFactory



2014-8-4 15:35:00 org.apache.catalina.core.StandardContext listenerStart
严重: Error configuring application listener of class com.sun.faces.config.ConfigureListener
java.lang.NoClassDefFoundError: javax/el/ExpressionFactory
 at java.lang.Class.getDeclaredConstructors0(Native Method)
 at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
 at java.lang.Class.getConstructor0(Class.java:2671)
 at java.lang.Class.newInstance0(Class.java:321)
 at java.lang.Class.newInstance(Class.java:303)
 at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3713)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4216)
 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
 at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:927)
 at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:890)
 at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
 at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1218)
 at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
 at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
 at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1306)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1570)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1579)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1559)
 at java.lang.Thread.run(Thread.java:595)
2014-8-4 15:35:00 org.apache.catalina.core.StandardContext listenerStart
严重: Skipped installing application listeners due to previous error(s)

问题是：.classpath文件下多了一句话

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
 <classpathentry exported="true" kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
 <classpathentry exported="true" kind="con" path="melibrary.com.genuitec.eclipse.j2eedt.core.MYECLIPSE_JAVAEE_5_CONTAINER"/>
 <classpathentry kind="src" path="src"/>
 <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
 <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
 <classpathentry kind="output" path="WebRoot/WEB-INF/classes"/>
</classpath>

将<classpathentry exported="true" kind="con" path="melibrary.com.genuitec.eclipse.j2eedt.core.MYECLIPSE_JAVAEE_5_CONTAINER"/>去掉