在IE中打開或下載文件<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
response.reset();
response.setContentType("application/vnd.ms-excel;charset=utf-8");
//IEでOpen
response.setHeader("Content-Disposition","inline; filename=/"" + fileName + "/"");
//DownLoadダイアログをPopUp
//response.setHeader("Content-Disposition","attachment; filename=/"" + fileName + "/"");
OutputStream os = response.getOutputStream();
WriteToExcel(os);
os.close();
response.flushBuffer();