今天调试一个jboss应用的时候发现这个错误。
严重: Unable to instantiate ExpressionFactory 'com.sun.el.ExpressionFactoryImpl' 2008-9-12 11:36:47 org.apache.catalina.core.StandardContext listenerStart 严重: Exception sending context initialized event to listener instance of class com.sun.faces.config.ConfigureListener com.sun.faces.config.ConfigurationException: It appears the JSP version of the container is older than 2.1 and unable to locate the EL RI expression factory, com.sun.el.ExpressionFactoryImpl. If not using JSP or the EL RI, make sure the context initialization parameter, com.sun.faces.expressionFactory, is properly set. at com.sun.faces.config.ConfigureListener.registerELResolverAndListenerWithJsp(ConfigureListener.java:545) at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:211) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3692) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4127) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:603) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:535) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:470) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1118) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1020) at org.apache.catalina.core.StandardHost.start(StandardHost.java:718) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1012) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442) at org.apache.catalina.core.StandardService.start(StandardService.java:450) at org.apache.catalina.core.StandardServer.start(StandardServer.java:680) at org.apache.catalina.startup.Catalina.start(Catalina.java:540) 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:585) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:271) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:409)
看提示是说jsp的版本有问题，其实是缺少了一个jar包 el-ri.jar
可以在这里下载：<a href=”http://code.google.com/p/seam-forum/downloads/detail?name=el-ri.jar&can=2&q=” target”_blank”>http://code.google.com/p/seam-forum/downloads/detail?name=el-ri.jar&can=2&q=</a>
将这个包放在jbosshome/server/default/lib中
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