AWS Lambda上传文件已损坏

Question

我有这段代码可以在本地主机上完美运行（文件正确上传到aws s3存储桶），但是当我将应用程序上传到aws lambda时，文件以损坏的形式上传到s3（显示空白/奇怪字节字符）。有人知道我在这里做错了吗？如果我上传txt文件，事情不会中断，所以我很困惑。

  @RequestMapping(value = "/uploadNew",  method = RequestMethod.POST, consumes = MediaType.MULTIPART_FORM_DATA )
    public ResponseEntity uploadNew( @RequestParam("files") MultipartFile file) throws IOException {

        //put the object into the bucket
        ObjectMetadata data = new ObjectMetadata();
        data.setContentType(file.getContentType());
        data.setContentLength(file.getSize());
        BasicAWSCredentials awsCreds = new BasicAWSCredentials("xxxxx", "xxxxx");
        AmazonS3 s3client = AmazonS3ClientBuilder.standard().withRegion(Regions.US_EAST_1).withCredentials(new AWSStaticCredentialsProvider(awsCreds)).build();
        PutObjectResult objectResult = s3client.putObject("xxxxx", file.getOriginalFilename(), file.getInputStream(), data);