title: problem when exporting to excel with JSF
body: <p>I'm using JSF/ICEFaces. The page is ICEFaces however I'm using the JSF datatable because ICEFaces had slow performance for some reason. Anyway, unlike the ICEFaces datatable, the JSF table doesn't come with export to excel so I'm writing my own. I decided to use Apache POI as below. The code executes well but I don't see pop up to save excel file. Am I missing something?</p>
  
  <pre><code>    public void ExportWithPoi(ActionEvent e) throws IOException{
           HSSFWorkbook wb = new HSSFWorkbook();
           HSSFSheet sheet = wb.createSheet();
  //       ArrayList&lt;PerfStatBean&gt; statFilterResults;
           Iterator&lt;PerfStatBean&gt; statsIterator = statFilterResults.iterator();
           int i=0;
                   HSSFRow row;
                   row = sheet.createRow((short)0);
                   row.createCell((short)0).setCellValue("Current Application ID");
                   row.createCell((short)1).setCellValue("Event Name");
                   row.createCell((short)2).setCellValue("Generic Method Name");          
                   while(statsIterator.hasNext()){
                       i++;                   
                       row = sheet.createRow((short)i);   
                       PerfStatBean perfBean = statsIterator.next();
                       row.createCell((short)0).setCellValue(perfBean.getCurrent_appl_id());
                       row.createCell((short)1).setCellValue(perfBean.getCurrent_appl_id());
                       row.createCell((short)2).setCellValue(perfBean.getGeneric_method_name());
  
                   }
                   HttpServletResponse res = (HttpServletResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse();
                   res.setContentType("application/vnd.ms-excel");
                   res.setHeader("Content-disposition",  "attachment; filename=PerfCollector.xls");
  
  
                   try {
                       ServletOutputStream out = res.getOutputStream();
  
                        wb.write(out);
                       out.flush();
                        out.close();
                  } catch (IOException ex) {
                          ex.printStackTrace();
                  }
  
                 FacesContext faces = FacesContext.getCurrentInstance();
                 faces.responseComplete();
      }
  </code></pre>
  
  <p>And the excel button is:</p>
  
  <pre><code>            &lt;h:commandButton id="excelBtn"
                 rendered="#{statsDisplayAndFilter.renderNextBtn}"
                  image="./xmlhttp/css/rime/css-images/excel.png"
                  actionListener="#{statsDisplayAndFilter.ExportWithPoi}"/&gt;
  </code></pre>
  
  <p>Thanks,</p>
  
  <p>Tam</p>