1. transfer data from jsp to an excel sheet coderanch.com
2. Excel Data Population using Java coderanch.com
3. How to extract data from Excel workbook using jsp coderanch.com
4. Code for transfering data from JSP to Excel Sheet coderanch.com
Do you need to preserve whatever formatting (fonts, bold, alignment, etc.) is used as well? If so, a library like POI is indeed your only choice. If it's only the actual values you're interested in, you might as well just create a CSV file and stream that to the client (using one of the many available Java CSV libraries).
5. How to extract data from JSP to excel sheet? forums.oracle.com
6. Jsp and data in Excel forums.oracle.com