Go语言视频零基础入门到精通

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String fileIdStr = request.getParameter("fileId");
if(StringUtils.isBlank(fileIdStr)){
  response.sendRedirect(request.getContextPath()+"/pages/client/error.jsp");
  return;
}
Long fileId = Long.parseLong(fileIdStr);
DevApplicationService fileService = (DevApplicationService)Application.lookupBean(DevApplicationServiceImpl.BEAN_NAME);
File tmpFile =  (File) fileService.get(File.class,fileId);
response.setContentType(tmpFile.getContentType());
response.setHeader("Content-Disposition", "attachment; filename=" +new String(tmpFile.getFileName().replace(' ','_').getBytes("gb2312"),"iso8859-1"));
try {
  String filePath = tmpFile.getPath();
  FileInputStream inputStream = null;
  if (!StringUtils.isEmpty(filePath)) {
   inputStream = new FileInputStream(FileUtil.REPOSITORY_PATH+java.io.File.separator + filePath);
  }

  String fileName = FilenameUtils.getName(filePath);
  fileName = new String(fileName.getBytes("GBK"), "ISO8859_1");
  response.addHeader("Content-Disposition",
    "attachment; filename=" + fileName);
  response.setContentType("application/file");
  BufferedInputStream fif = new BufferedInputStream(inputStream);
  ServletOutputStream outputStream = response.getOutputStream();
  int ch;

  while ((ch = fif.read()) != -1) {
   outputStream.write(ch);
  }

  outputStream.flush();
  outputStream.close();
  inputStream.close();
} catch (Exception ex) {
     String simplename = ex.getClass().getSimpleName();
     if(!"ClientAbortException".equals(simplename)){
           ex.printStackTrace();
      }
}finally{
  out.clear();
  out = pageContext.pushBody();
}