Question

    public void upload(List<CommonsMultipartFile> fileUpload) {
        for(CommonsMultipartFile file : fileUpload)
            {
                try
                {
                    String contentType = file.getContentType();
                    String newName = generateFileKey(file);
                    AmazonS3UploadRequest uploadRequest = new AmazonS3UploadRequest.Builder()
                            .bucket(bucket)
                            .contentType(contentType)
                            .newResourceName(newName)
                            .resourceStream(file.getInputStream(), Long.valueOf(file.getBytes().length))
                            .build();
                    uploadToS3(uploadRequest);
                } 
                catch (Exception e)
                {
                    LOG.error("Error while uploading files to s3: ", e);
                    throw new ServiceRuntimeException("Error writing file to s3 bucket");
                }
            }
    }

   public String uploadToS3(AmazonS3UploadRequest uploadRequest) { 

        ObjectMetadata objectMetadata = new ObjectMetadata();
        objectMetadata.setContentLength(uploadRequest.getResourceLength());
        objectMetadata.setContentType(uploadRequest.getContentType());
        Upload upload = transferManager.upload(uploadRequest.getBucket(), uploadRequest.getNewResourceName(), uploadRequest.getResourceStream(), objectMetadata);
    }

我将pdf文件上传到amazon S3存储桶，所有文件都上传成功但是大文件（15页pdf等）是空的。亚马逊transferManager - 正在通过spring注入。 Amazon凭据是从TansferManager中的.property文件注入的。注意：.png / .jpeg文件也被上传为空。嗯，我有点困惑......发生了什么。需要一些投入。提前谢谢。

Answer 1

尝试使用 Apache Commons 中的FileUpload 类通过Streaming API。该页面上的代码段可以正常使用。

Answer 2

尝试使用此代码将您的PDF上传到amazon s3，我假设您拥有AWS S3 app Id和密钥。

AWSCredentials credentials = new BasicAWSCredentials(appId, appSecret);
AmazonS3 s3Client = new AmazonS3Client(credentials);

String bucketPath = "YOUR_S3_BUCKET";

public void upload(List < CommonsMultipartFile > fileUpload) {
    for (CommonsMultipartFile file: fileUpload) {
        try {
            String contentType = file.getContentType();
            String pdfName = generateFileKey(file);
            InputStream is = file.getInputStream();
            ObjectMetadata meta = new ObjectMetadata();
            meta.setContentLength(is.available());
            s3Client.putObject(new PutObjectRequest(bucketPath, pdfName, is, meta).withCannedAcl(CannedAccessControlList.PublicRead));
        } catch (Exception e) {
            LOG.error("Error while uploading files to s3: ", e);
            throw new ServiceRuntimeException("Error writing file to s3 bucket");
        }
    }
}

将文件上传到Amazon S3存储桶：上传工作正常，但有些大文件为空

2 个答案: