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Subject: Excel, Struts and Downloading

Subject: Excel, Struts and Downloading

2007-05-27       - By Jon Wynacht

 Back
Reply:     1     2     3     4  

Hi,

I used to run Struts 1.2.9, POI 2.5 and could generate Excel files  
from a servlet and download them without issue. I recently upgraded  
to Struts 1.3.5 and POI 3 and it looks like I broke that capability.  
I'm getting the following error:

java.lang.IllegalStateException: getOutputStream() has already been  
called for this response

I've searched through the Net and the archives here for info but  
nothing really seems to fit for my situation; it's mostly JSP.

I'm calling an Action servlet which makes a call to the model and  
gets some data, creates a new workbook and then does this:

<snip>
    response.setContentType("application/vnd.ms-excel");
                response.setHeader("Content-disposition",  
"attachment;filename=\"attendees.xls\"");
                response.addHeader("Content-description", "Event  
Attendees");
                ServletOutputStream stream = response.getOutputStream
();
                wb.write(stream);
                stream.close();
    ...
    forward = "SUCCESS";
    ...
    return mapping.findForward(forward);
</snip>

It's what I did before I upgraded and things worked fine. Now they don't

Any ideas? Am I missing something really obvious or was I bending the  
rules a bit and taking chances with my data in my previous config?

Cheers and thanks,

Jon

Jon Wynacht
jon@(protected)
http://www.objectevolution.com



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