spring boot 上传下载文件

 

在application-prod中的配置

在application-local中的配置

上传

@PostMapping("uploadDemand/{id}") @ApiOperation("报价单上传文件") public String uploadDemand(@RequestParam("file") MultipartFile file,@PathVariable String id) { // 获取原始名字 String fileName = file.getOriginalFilename(); // 获取后缀名 String suffixName = fileName.substring(fileName.lastIndexOf(".")); Integer fileType = null; if (suffixName.toLowerCase().equals(".xls") || suffixName.toLowerCase().equals(".xlsx")){ fileType = 0; } if (suffixName.toLowerCase().equals(".pdf")) { fileType = 1; } // 文件保存路径 String filePath = uploadFilePath; // 文件重命名，防止重复 String fileNamesPath = filePath + UUID.randomUUID() + fileName; // 文件对象 File dest = new File(fileNamesPath); // 判断路径是否存在，如果不存在则创建 if(!dest.getParentFile().exists()) { dest.getParentFile().mkdirs(); } try { // 保存到服务器中 file.transferTo(dest); return "上传成功"; } catch (Exception e) { e.printStackTrace(); } return "上传失败"; }

下载

@GetMapping("/downloadTemplate") @ApiOperation("下载") public void downloadOfferDemandFile(HttpServletResponse response,@RequestParam(value="fileName") String fileName,@RequestParam(value="filePath") String filePath){ StringBuilder filePathAddres = new StringBuilder(); // 文件下载地址 filePathAddres.append(filePath); File file = new File(filePathAddres.toString()); try { FileUtils.downloadFile(file,fileName,response); } catch (IOException e) { e.printStackTrace(); } }

FileUtils类

/** * 文件下载 * * @param file * 创建的文件对象 new File() * @param response * HttpServletResponse响应 * @param fileName * 指定下载文件的名称 * @throws IOException * 当文件不存在或者创建文件流时 会抛此异常 */ public static void downloadFile(File file, String fileName, HttpServletResponse response) throws IOException { if (!file.exists()) { throw new FileNotFoundException("file not found:" + file.getAbsolutePath()); } BufferedInputStream bufferStream = new BufferedInputStream(new FileInputStream(file)); byte[] buffer = new byte[1024]; int n; if (fileName != null) { response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); response.setHeader("Content-Disposition", "attachment;filename="+ URLEncoder.encode(fileName, "utf-8")); // response.setHeader("Content-disposition", // "attachment; filename=" + new String(fileName.getBytes("gb2312"), "iso-8859-1")); } while (-1 != (n = bufferStream.read(buffer))) { response.getOutputStream().write(buffer, 0, n); } response.getOutputStream().flush(); bufferStream.close(); }