Amazon S3 - Batch File Upload Using Java API?

Question

We're looking to begin using S3 for some of our storage needs and I'm looking for a way to perform a batch upload of 'N' files. I've already written code using the Java API to perform single file uploads, but is there a way to provide a list of files to pass to an S3 bucket?

I did look at the following question is-it-possible-to-perform-a-batch-upload-to-amazon-s3, but it is from two years ago and I'm curious if the situation has changed at all. I can't seem to find a way to do this in code.

What we'd like to do is to be able to set up an internal job (probably using scheduled tasking in Spring) to transition groups of files every night. I'd like to have a way to do this rather than just looping over them and doing a put request for each one, or having to zip batches up to place on S3.

Answer 1

The easiest way to go if you're using the AWS SDK for Java is the TransferManager. Its uploadFileList method takes a list of files and uploads them to S3 in parallel, or uploadDirectory will upload all the files in a local directory.