ByteArrayResource大文件读取整个文件可能是内存消耗问题。
您可以使用以下命令在spring mvc控制器中代理文件上传
InputStreamResource：
@RequestMapping(value = "/upload", method = RequestMethod.POST)public ResponseEntity<?> uploadImages(@RequestPart("images") final MultipartFile[] files) throws IOException { linkedMultiValueMap<String, Object> map = new linkedMultiValueMap<>(); String response; HttpStatus httpStatus = HttpStatus.CREATED; try { for (MultipartFile file : files) { if (!file.isEmpty()) { map.add("images", new MultipartInputStreamFileResource(file.getInputStream(), file.getOriginalFilename())); } } HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.MULTIPART_FORM_DATA); String url = "http://example.com/upload"; HttpEntity<linkedMultiValueMap<String, Object>> requestEntity = new HttpEntity<>(map, headers); response = restTemplate.postForObject(url, requestEntity, String.class); } catch (HttpStatusCodeException e) { httpStatus = HttpStatus.valueOf(e.getStatusCode().value()); response = e.getResponseBodyAsString(); } catch (Exception e) { httpStatus = HttpStatus.INTERNAL_SERVER_ERROR; response = e.getMessage(); } return new ResponseEntity<>(response, httpStatus);}class MultipartInputStreamFileResource extends InputStreamResource { private final String filename; MultipartInputStreamFileResource(InputStream inputStream, String filename) { super(inputStream); this.filename = filename; } @Override public String getFilename() { return this.filename; } @Override public long contentLength() throws IOException { return -1; // we do not want to generally read the whole stream into memory ... }}
