public void downFile(HttpServletResponse response,File file,String zipName) throws IOException{
InputStream fis = new BufferedInputStream(new FileInputStream(file));
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
response.setContentType("application/zip");
response.setHeader("Content-disposition", "attachment;filename="+ new String(zipName.getBytes("UTF-8"), "ISO8859-1"));
OutputStream outputStream = new BufferedOutputStream(response.getOutputStream());
outputStream.write(buffer);
outputStream.flush();
outputStream.close();
}