You could use apache directly, as described here https://commons.apache.org/proper/commons-fileupload/streaming.html.
@Controller
public class UploadController {
@RequestMapping("/upload")
public String upload(HttpServletRequest request) throws IOException, FileUploadException {
ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iterator = upload.getItemIterator(request);
while (iterator.hasNext()) {
FileItemStream item = iterator.next();
if (!item.isFormField()) {
InputStream inputStream = item.openStream();
//...
}
}
}
}
Make sure to disable springs multipart resolving mechanism.
application.yml:
spring:
http:
multipart:
enabled: false