We use it at work with python code. I’ve setup CI with CodeBuild but not had the occasion to dig into CodeDeploy

I would suggest you build a fat jar and push that to S3 or similar. Beanstalk ain’t pretty but it’s pretty effective for handling deployments, restarts, os updates, and logical groupings of apps.

Jar in CodeBuild and then use codedeploy to publish/deploy into Beanstalk or an env