I have done the following configuartion to integrate the FCKeditor with java for Image Upload. Everything is working fine.
1:Placec FCKeditior2.3jar in \WEB-INF\lib folder
2: Th follwing should be add in fckconfig.js file
<!-- File Upload -->
FCKConfig.LinkBrowserURL = FCKConfig.BasePath + "filemanager/browser/default/browser.html?Connector=connectors/jsp/connector" ;
FCKConfig.LinkUploadURL = FCKConfig.BasePath + 'filemanager/upload/simpleuploader?Type=File' ;
<!-- Image Upolad -->
FCKConfig.ImageBrowserURL = FCKConfig.BasePath + "filemanager/browser/default/browser.html?Type=Image&Connector=connectors/jsp/connector" ;
FCKConfig.ImageUploadURL = FCKConfig.BasePath + 'filemanager/upload/simpleuploader?Type=Image' ;
<!-- Flash upload -->
FCKConfig.FlashBrowserURL = FCKConfig.BasePath + "filemanager/browser/default/browser.html?Type=Flash&Connector=connectors/jsp/connector" ;
FCKConfig.FlashUploadURL = FCKConfig.BasePath + 'filemanager/upload/simpleuploader?Type=Flash' ;
3: place the following entries in web.xml
<servlet>
<servlet-name>Connector</servlet-name>
<servlet-class>com.fredck.FCKeditor.connector.ConnectorServlet</servlet-class>
<init-param>
<param-name>baseDir</param-name>
<param-value>/UserFiles/</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Connector</servlet-name>
<url-pattern>/FCKeditor/editor/filemanager/browser/default/connectors/jsp/connector</url-pattern>
<!-- <url-pattern>/editor/filemanager/browser/default/connectors/jsp/connector</url-pattern> -->
</servlet-mapping>
<servlet>
<servlet-name>SimpleUploader</servlet-name>
<servlet-class>com.fredck.FCKeditor.uploader.SimpleUploaderServlet</servlet-class>
<init-param>
<param-name>baseDir</param-name>
<param-value>/UserFiles/</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>enabled</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>AllowedExtensionsFile</param-name>
<param-value></param-value>
</init-param>
<init-param>
<param-name>DeniedExtensionsFile</param-name>
<param-value>php|php3|php5|phtml|asp|aspx|ascx|jsp|cfm|cfc|pl|bat|exe|dll|reg|cgi</param-value>
</init-param>
<init-param>
<param-name>AllowedExtensionsImage</param-name>
<param-value>jpg|gif|jpeg|png|bmp</param-value>
</init-param>
<init-param>
<param-name>DeniedExtensionsImage</param-name>
<param-value></param-value>
</init-param>
<init-param>
<param-name>AllowedExtensionsFlash</param-name>
<param-value>swf|fla</param-value>
</init-param>
<init-param>
<param-name>DeniedExtensionsFlash</param-name>
<param-value></param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SimpleUploader</servlet-name>
<url-pattern>/FCKeditor/editor/filemanager/upload/simpleuploader</url-pattern>
</servlet-mapping>
1:Placec FCKeditior2.3jar in \WEB-INF\lib folder
2: Th follwing should be add in fckconfig.js file
<!-- File Upload -->
FCKConfig.LinkBrowserURL = FCKConfig.BasePath + "filemanager/browser/default/browser.html?Connector=connectors/jsp/connector" ;
FCKConfig.LinkUploadURL = FCKConfig.BasePath + 'filemanager/upload/simpleuploader?Type=File' ;
<!-- Image Upolad -->
FCKConfig.ImageBrowserURL = FCKConfig.BasePath + "filemanager/browser/default/browser.html?Type=Image&Connector=connectors/jsp/connector" ;
FCKConfig.ImageUploadURL = FCKConfig.BasePath + 'filemanager/upload/simpleuploader?Type=Image' ;
<!-- Flash upload -->
FCKConfig.FlashBrowserURL = FCKConfig.BasePath + "filemanager/browser/default/browser.html?Type=Flash&Connector=connectors/jsp/connector" ;
FCKConfig.FlashUploadURL = FCKConfig.BasePath + 'filemanager/upload/simpleuploader?Type=Flash' ;
3: place the following entries in web.xml
<servlet>
<servlet-name>Connector</servlet-name>
<servlet-class>com.fredck.FCKeditor.connector.ConnectorServlet</servlet-class>
<init-param>
<param-name>baseDir</param-name>
<param-value>/UserFiles/</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Connector</servlet-name>
<url-pattern>/FCKeditor/editor/filemanager/browser/default/connectors/jsp/connector</url-pattern>
<!-- <url-pattern>/editor/filemanager/browser/default/connectors/jsp/connector</url-pattern> -->
</servlet-mapping>
<servlet>
<servlet-name>SimpleUploader</servlet-name>
<servlet-class>com.fredck.FCKeditor.uploader.SimpleUploaderServlet</servlet-class>
<init-param>
<param-name>baseDir</param-name>
<param-value>/UserFiles/</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>enabled</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>AllowedExtensionsFile</param-name>
<param-value></param-value>
</init-param>
<init-param>
<param-name>DeniedExtensionsFile</param-name>
<param-value>php|php3|php5|phtml|asp|aspx|ascx|jsp|cfm|cfc|pl|bat|exe|dll|reg|cgi</param-value>
</init-param>
<init-param>
<param-name>AllowedExtensionsImage</param-name>
<param-value>jpg|gif|jpeg|png|bmp</param-value>
</init-param>
<init-param>
<param-name>DeniedExtensionsImage</param-name>
<param-value></param-value>
</init-param>
<init-param>
<param-name>AllowedExtensionsFlash</param-name>
<param-value>swf|fla</param-value>
</init-param>
<init-param>
<param-name>DeniedExtensionsFlash</param-name>
<param-value></param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SimpleUploader</servlet-name>
<url-pattern>/FCKeditor/editor/filemanager/upload/simpleuploader</url-pattern>
</servlet-mapping>