java 前端上传文件后端解析并转发到第三方存储，Hutool 工具

单个文件上传

  @PostMapping("/upload")public MyResponse<?> upload(MultipartFile file) {if (multipartFiles == null || multipartFiles.length == 0) {throw new MessageException("未选择文件");}InputStreamResource inputStreamResource = new InputStreamResource(file.getInputStream(), file.getOriginalFilename());MultiResource multiResource = new MultiResource(inputStreamResource);HttpResponse response = HttpRequest.post(url).form("file", multiResource).execute();resultJson = response.body();return MyResponse.success(multipartFiles.length);}

多个文件上传

  @PostMapping("/upload")public MyResponse<?> upload(MultipartFile[] multipartFiles) {if (multipartFiles == null || multipartFiles.length == 0) {throw new MessageException("未选择文件");}MultiResource multiResource = new MultiResource(Arrays.stream(multipartFiles).map(multipartFile -> {try {return new InputStreamResource(multipartFile.getInputStream(), multipartFile.getOriginalFilename());} catch (IOException e) {throw new MessageException("输入流打开失败", e);}}).collect(Collectors.toList()));HttpResponse httpResponse = HttpRequest.post("https://demo.shansing.net/api/uploadFiles")//.timeout(myConfig.getLongTimeout()).form("files", multiResource).execute();return MyResponse.success(multipartFiles.length);}

转自 

Hutool 中转 MultipartFile 文件上传 - 闪星空间 (shansing.com)