FileInputStream is = new FileInputStream(new File("C:\\Users\\ys\\Desktop\\内蒙\\kedacom相关操作手册\\pmchelp.pdf"));
// resp.setContentType("application/octet-stream");
resp.setContentType("application/pdf");
//resp.setHeader("Content-Disposition", "attachment;fileName="+"20170315160623.pdf");
ServletOutputStream sos = resp.getOutputStream();
byte[] bytes = new byte[1024];int count = 0;
while ((count = is.read(bytes)) != -1) {
sos.write(bytes, 0, count);
}
is.close();sos.close();