SpringMVC文件下载（一）

一、java代码

@RequestMapping(value = "/file/ajax/file_download")public ResponseEntity<byte[]> transportFileDownload(HttpServletRequest req,Integer id) throws IOException {UploadFile uf = uploadFileService.get(id);String uploadDir = req.getSession().getServletContext().getRealPath("/")+ Constants.FILE_UPLOAD_PATH;String filePath = uploadDir + uf.getFileUrl();File file = new File(filePath);HttpHeaders headers = new HttpHeaders();String fileName = new String(uf.getFileName().getBytes("UTF-8"),"iso-8859-1");// 为了解决中文名称乱码问题headers.setContentDispositionFormData("attachment", fileName);headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),headers, HttpStatus.CREATED);}

二、前台调用

<a href="${ctx}/file/ajax/file_download?id=${id}" >