I'm using ExcelWriter from SoftArtisan to generate excel spreadsheet. When i deploy my XXX.war under tomcat, it works fine. I can open excel files but under Jbuilder it doesn't seem to work fine, i cannot generate my excel file when i send my request. I run my servlet under Jbuilder and send the request through IE but same problem, it doesn't work, can you help please ? thanks. Or is there a plug-in to generate excel file under JBuilder ?