java s3_Java多部件上传到S3

我的方法接收一个缓冲的读卡器,并转换文件中的每一行。但是,我需要将这个转换的输出上传到一个S3桶。这些文件非常大,所以我希望能够将我的上传流到S3对象中。

要做到这一点,我想我需要使用多部分上传,但是我不确定我是否正确地使用它,因为似乎没有什么上传。

以下是我的方法:

public void transform(BufferedReader reader)

{

Scanner scanner = new Scanner(reader);

String row;

List partETags = new ArrayList<>();

InitiateMultipartUploadRequest request = new InitiateMultipartUploadRequest("output-bucket", "test.log");

InitiateMultipartUploadResult result = amazonS3.initiateMultipartUpload(request);

while (scanner.hasNext()) {

row = scanner.nextLine();

InputStream inputStream = new ByteArrayInputStream(row.getBytes(Charset.forName("UTF-8")));

log.info(result.getUploadId());

UploadPartRequest uploadRequest = new UploadPartRequest()

.withBucketName("output-bucket")

.withKey("test.log")

.withUploadId(result.getUploadId())

.withInputStream(inputStream)

.withPartNumber(1)

.withPartSize(5 * 1024 * 1024);

partETags.add(amazonS3.uploadPart(uploadRequest).getPartETag());

}

log.info(result.getUploadId());

CompleteMultipartUploadRequest compRequest = new CompleteMultipartUploadRequest(

"output-bucket",

"test.log",

result.getUploadId(),

partETags);

amazonS3.completeMultipartUpload(compRequest);

}