/**
* 文件下载
*
* @param request
* @param response
* @throws PageNotFoundException
* @throws IOException
* @throws Exception
*/
@RequestMapping(value = "/download/{fid}")
public void downloadFile(
HttpServletRequest request, HttpServletResponse response, @PathVariable long fid)
throws PageNotFoundException, IOException {
Attachment file = attachmentService.getFileById(fid);
if (file == null) {
throw new PageNotFoundException();
}
String fileName = file.getFileName(); // 得到下载文件的名字
// int fileSize = (int) file.getFileSize() * 1024;
try {
String agent = WebUtil.getClientInfo(request);
if (null != agent && -1 != agent.indexOf("MSIE")) {
fileName = URLEncoder.encode(fileName, "UTF-8");
fileName = StringUtil.replace(fileName, "+", "%20");
} else {
fileName = new String(fileName.getBytes("UTF-8"), "iso-8859-1");
// fileName = StringUtil.replace(fileName, " ", "%20");
}
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
response.setHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
response.setContentType(FileUploadUtil.getFileMimeType(file.getFileType())); // 设置response的编码方式
// response.setContentLength( fileSize ); // 暂时去除文件大小的输出，防止浏览器接受数据不完整
try {
OutputStream myout = response.getOutputStream(); // 从response对象中得到输出流,准备下载
FileInputStream fis = new FileInputStream(file.getFileUrl()); // 读出文件到i/o流
BufferedInputStream buff = new BufferedInputStream(fis);
int read = 0;
byte[] temp = new byte[1024]; // 相当于我们的缓存
while ((read = buff.read(temp)) != -1) {
myout.write(temp, 0, read);
}
// 将写入到客户端的内存的数据,刷新到磁盘
myout.flush();
buff.close();
myout.close();
} catch (IOException e) {
log.error("download error, file id is " + fid, e);
throw e;
}
}
/**
* 文件下载
*
* @param request
* @param response
* @throws PageNotFoundException
* @throws IOException
* @throws Exception
*/
@RequestMapping(value = "/download")
public String downloadFile(HttpServletRequest request) throws PageNotFoundException, IOException {
long fid = WebUtil.getValueLong(request, "fid", -1);
return "redirect:/system/attachment/download/" + fid;
}
