AWS S3 local server for integration testing

You can try installing minio server on your laptop/system, its open source & single static binary. Server is S3 compatible. Then you can try minio-java client library for all operations, following is basic operations example.

Installing minio server [GNU/Linux]

$ wget https://dl.minio.io/server/minio/release/linux-amd64/minio$ chmod 755 minio$ ./minio --help  

Hope it helpsDisclaimer: I work for Minio

Late answer, will be useful mostly for Docker users. There's a great S3 compatible storage software called Riak CS and there's docker-riak-cs image that allows to quickly launch the server.

I've been using it for nearly 2 years for local development and integration testing with great success. It has some limitations, but nothing major that comes in the way, see api / compatibility documentation.

If you need Docker-less solution, you can set it up locally for each build, all setup and configuration scripts are available in docker-riak-cs repository.

You can try localstack, which is an open source local AWS cloud stack made for testing. It provides implementations of several of AWS services, including S3.

It looks like a very popular open source project on GitHub.