AWS official reference documentation: https://docs.aws.amazon.com/s3/index.html
AWS basic introduction: https://docs.aws.amazon.com/zh_cn/AmazonS3/latest/gsg/index.html
We introduce you to Amazon S3, to help you create an account, and then through a simple example to show you the process for the first time use of Amazon S3. Also it provides tips and links to advanced product features and resources.
AWS Developer's Guide: https://docs.aws.amazon.com/zh_cn/AmazonS3/latest/dev/index.html
Amazon S3 provides a conceptual description, and the detailed description of the various functions.
AWS SDK for Java 2.0 Developer's Guide: https://docs.aws.amazon.com/zh_cn/sdk-for-java/v2/developer-guide/welcome.html