Problem installing FCKEditor in my Java WebApp

Hi there!

I tried to install FCKEditor in my java WebApp.

I actually implemented it in the Javascript way, till there no problem, i can see it working in my webapp.

Then i wanted to activate the connector, and there i met some problem!

I did the modification explained in the java documentation:

  <web-app version="2.4">
    ...
    <servlet>
      <servlet-name>Connector</servlet-name>
        <servlet-class>
          net.fckeditor.connector.ConnectorServlet
      </servlet-class>
      <load-on-startup>1</load-on-startup>
    </servlet>
    ...
    <servlet-mapping>
      <servlet-name>Connector</servlet-name>
      <url-pattern>
        /fckeditor/editor/filemanager/connectors/*
      </url-pattern>
    </servlet-mapping>
    ...
  </web-app>

and also added the fckeditor.properties file with the following content:

connector.userActionImpl=net.fckeditor.requestcycle.impl.UserActionImpl

But when i'm starting the webapp, i get the following error:

GRAVE: La servlet /Annuaire a généré une exception "load()"
java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileItemFactory
   at java.lang.Class.getDeclaredConstructors0(Native Method)
   at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
   at java.lang.Class.getConstructor0(Unknown Source)
   at java.lang.Class.newInstance0(Unknown Source)
   at java.lang.Class.newInstance(Unknown Source)
   at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1048)
   at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:925)
   at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3857)
   at org.apache.catalina.core.StandardContext.start(StandardContext.java:4118)
   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:589)
   at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:536)
   at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:471)
   at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1102)
   at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
   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:683)
   at org.apache.catalina.startup.Catalina.start(Catalina.java:537)
   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:271)
   at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:409)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.fileupload.FileItemFactory
   at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1332)
   at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1181)
   at java.lang.ClassLoader.loadClassInternal(Unknown Source)
   ... 31 more

Please help me!