java.lang.ClassNotFoundException 如何解决？错误如下：

Question

This product is licensed to zhangthe9
The following plugins are disabled at the moment:
* Click plugin (set -Drebel.click_plugin=true to enable)
Reloads menu.xml menu definitions of Apache Click projects.
* JRuby Plugin (set -Drebel.jruby_plugin=true to enable)
* Jersey plugin (set -Drebel.jersey_plugin=true to enable)
Reloads Jersey configuration from Java annotations.
* Lift plugin (set -Drebel.lift_plugin=true to enable)
Supports reloading singleton objects that extend RestHelper, MVCHelper,
LiftScreen or Wizard.
* Oracle ADF Core plugin (set -Drebel.adf_core_plugin=true to enable)
JRebel ADF Core Plugin
* Oracle ADF Faces plugin (set -Drebel.adf_faces_plugin=true to enable)
JRebel ADF Faces Plugin
* Seam-Wicket plugin (set -Drebel.seam_wicket_plugin=true to enable)
Integration with load time weaving seam annotations to wicket classes
(-javaagent:<path-to-jboss-seam-wicket-jar>)
* WebObjects plugin (set -Drebel.webobjects_plugin=true to enable)
WebObjects JRebel Plugin
#############################################################
java.lang.ClassNotFoundException: org.apache.catalina.startup.Catalina
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.apache.catalina.startup.Bootstrap.init(Bootstrap.java:215)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:390)

Answer 1

应该是少jar包

Answer 2

没找到这个类，少jar包了吧