How do i specify the filename for a binary file generated by a JSP?

I am writing a report generator that has the ability to generate Excel files. The user clicks on a link (exporter.jsp), the page's content-type has been set to "application/vnd.ms-excel" which naturally prompts the user to either save to a file or open directly in Excel.
It works fine, but requires the user to manually rename the generated file from "exporter.jsp" to "whatever.xls". Furthermore, Firefox will not let you rename the file in save dialog box, it just automatically saves the file as "exporter.jsp", you must rename it from the file browser.
How do specify the output file name from within JSP?
Btw, right clicking and selecting "save link as" allows for specifying the file name, but the file that is created is empty.
Thanks

You need to set the content-disposition header as well as the content-type.
here is one article on the subject
res.setContentType("application/vnd.ms-excel");
res.setHeader("Content-Disposition", "attachment; filename=" + filename);

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