if(request.getHeader("User-Agent").toUpperCase().indexOf("MSIE") > 0){    response.setHeader("Content-disposition", "attachment; filename="            + URLEncoder.encode(product.getRealName1(), "UTF-8"));    }else{        response.setHeader("Content-disposition", "attachment; filename="            + new String(product.getRealName1().getBytes("utf-8"), "ISO8859-1"));}