JSP generating Excel spreadsheet (XLS) to download

Question

I have this application I\'m developing in JSP and I wish to export some data from the database in XLS (MS Excel format).

Is it possible under tomcat to just write a

Answer 1

  try {
            String absoluteDiskPath =  test.xls";
            File f = new File(absoluteDiskPath);
            response.setContentType("application/xlsx");
            response.setHeader("Content-Disposition", "attachment; filename=" + absoluteDiskPath);
            String name = f.getName().substring(f.getName().lastIndexOf("/") + 1, f.getName().length());
            InputStream in = new FileInputStream(f);
            out.clear(); //clear outputStream prevent illegalStateException write binary data to outputStream
            ServletOutputStream outs = response.getOutputStream();
            int bit = 256;
            int i = 0;
            try {
                while ((bit) >= 0) {
                    bit = in.read();
                    outs.write(bit);
                }
                outs.flush();
                outs.close();
                in.close();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            } finally {
                try {
                    if(outs != null)
                        outs.close(); 
                    if(in != null)
                        in.close(); 
                }catch (Exception ioe2) {
                    ioe2.printStackTrace(); 
                }
            }
    } catch (Exception ex) {
        ex.printStackTrace();

    }