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Génération d'un fichier Excel et java.lang.IllegalStateException: SRVE0199E: Elément OutputStream déja obtenu
Bonjour,
Je veux dans un premier temps créer un fichier Excel à partir de mon action.
de ce fait j'ai ce code :
Code:
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protected ActionForward onexecute(ActionMapping _mapping, ActionForm _form, HttpServletRequest _request, HttpServletResponse _response)
throws IOException, ServletException {
HSSFWorkbook wb = new HSSFWorkbook();
// generate the Excel file and put it in the HTTP response
OutputStream outputStream = null;
try
{
outputStream = generateFile(_response, wb, "OK");
}
catch(Exception e)
{
LOGGER.error(e.getMessage(), e);
}
finally
{
if(outputStream != null)
{
outputStream.flush();
outputStream.close();
}
}
return _mapping.findForward("success");
}
protected OutputStream generateFile(final HttpServletResponse _response,
HSSFWorkbook wb,
String arreteCourantText) throws IOException
{
// stream of bytes
OutputStream outputStream;
// set the HTTP response headers
_response.setContentType("application/octet-stream");
_response.addHeader("Content-Disposition", "attachment; filename=\"monFichier.xls\"");
_response.setHeader("Pragma", "public");
_response.setHeader("Cache-Control", "cache");
_response.setHeader("Cache-control", "must-revalidate");
// put the Excel file in the HTTP response as a stream of bytes
outputStream = _response.getOutputStream();
byte[] bytes = wb.getBytes();
POIFSFileSystem fs = new POIFSFileSystem();
fs.createDocument(new ByteArrayInputStream(bytes), "Workbook");
fs.writeFilesystem(outputStream);
HSSFSheet sheet = wb.createSheet("test");
HSSFRow row = sheet.createRow(0);
HSSFCell cell = row.createCell((short)0);
cell.setCellValue(10);
return outputStream;
}
} |
par contre dans le console j'ai le message d'erreur suivant ....
java.lang.IllegalStateException: SRVE0199E: Elément OutputStream déjà obtenu
[10/10/11 16:36:37:868 CEST] 00000024 WebApp E SRVE0026E: [Erreur de servlet]-[action]: java.lang.IllegalStateException: Cannot forward. Response already committed.
et dans l'ihm j'ai (ce qui est en piece jointe)
Merci de votre aide :)
