Null component Catalina:type=JspMonitor,name=jsp,WebModule=//localhost/,J2EEAppl

 

2011-9-6 23:09:19 org.apache.coyote.http11.Http11Protocol init

信息: Initializing Coyote HTTP/1.1 on http-8082

2011-9-6 23:09:19 org.apache.catalina.startup.Catalina load

信息: Initialization processed in 989 ms

2011-9-6 23:09:19 org.apache.catalina.core.StandardService start

信息: Starting service Catalina

2011-9-6 23:09:19 org.apache.catalina.core.StandardEngine start

信息: Starting Servlet Engine: Apache Tomcat/6.0.18

2011-9-6 23:09:26 org.apache.tomcat.util.modeler.Registry registerComponent

严重: Null component Catalina:type=JspMonitor,name=jsp,WebModule=//localhost/,J2EEApplication=none,J2EEServer=none

java.lang.reflect.InvocationTargetException

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)

Caused by: java.lang.UnsupportedClassVersionError: Bad version number in .class file (unable to load class com.ait.deasang.system.action.SysOnlineUser)

at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1851)

at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:890)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1354)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)

at org.apache.catalina.startup.WebAnnotationSet.loadClassAnnotation(WebAnnotationSet.java:145)

at org.apache.catalina.startup.WebAnnotationSet.loadApplicationListenerAnnotations(WebAnnotationSet.java:73)

at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:56)

at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:297)

at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1068)

at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)

at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4252)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)

at org.apache.catalina.core.StandardService.start(StandardService.java:516)

at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)

at org.apache.catalina.startup.Catalina.start(Catalina.java:578)

... 6 more

解决：你的JDK 版本不兼容,操作步骤...

1.打开MyEclipse
2.Window
3.Preferences
4.选择Java节点
5.Installed JREs
6.可以看到当前使用的JVM是什么版本，路径在哪里，现在我们要改正和Tomcat一样的虚拟机.
6.Edit
7.JRE home directory
8.Browse 找到:C:\Sun\SDK\jdk\jre(找到你的安装目录)
9.ok