Facing problem with posting Excel file for download - Content in browser

Question

I am trying to post an Excel file to download from a servlet to a JSP. The content is written properly but to the IE browser and not in an Excel. I even tried giving the ContentType as Word/CSV etc. But nothing works, the content gets displayed only in the browser.
PLEASE HELP.
Code snippet in calling JSP:
DownloadServlet downServlet = new DownloadServlet();
downServlet.download(response);
Code in Servlet:
public class DownloadServlet extends HttpServlet{
public void download(HttpServletResponse response) throws IOException {
          /*PrintWriter out = response.getWriter( );
          response.setContentType("text/html");
          out.println("<H1>Hello from a Servlet</h2>"); */
     /*HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("Sheet1");*/
String strData = "This is a Test for Download";
byte[] b = strData.getBytes();
//response.reset();
response.setHeader("Content-disposition", "attachment; filename=" + "Download.xls");
response.setContentType( "application/msword" );
//response.addHeader( "Content-Description", "Download Excel file" );
ServletOutputStream out = response.getOutputStream();
out.write(b);
//out.flush();
out.close();          
}

Answer 1

Hi Naresh,
My thoughts on a possible solution, convert the last character value to a HEX value and check if it falls within the ASCII/Unicode CP range, Obviously this becomes easier if you are just looking at a single language character set.
The below FM and code helps you check if the character falls within the ASCII char set.
DATA: l_in_char TYPE string,
      l_out     TYPE xstring.
CALL FUNCTION 'NLS_STRING_CONVERT_FROM_SYS'
  EXPORTING
    lang_used                   = sy-langu
    SOURCE                      = l_in_char
  TO_FE                       = 'MS '
IMPORTING
   RESULT                      = l_out
  SUBSTED                     =
EXCEPTIONS
   illegal_syst_codepage       = 1
   no_fe_codepage_found        = 2
   could_not_convert           = 3
   OTHERS                      = 4.
IF l_out LT '0' OR l_out GT '7F'.
  WRITE: 'error'.
ENDIF.
Links: http://www.asciitable.com/
          http://www.utf8-chartable.de/unicode-utf8-table.pl
Regards,
Chen
Edited by: Chen K V on Apr 21, 2011 11:25 AM