javadocset: https://github.com/Kapeli/javadocset#readme

Simple command line tool for generating a Dash docset from Javadoc-generated documentation

Usage

1. Download a compiled binary from http://kapeli.com/javadocset.zip or compile it yourself from source using Xcode.
2. Use it: ./javadocset <any docset name you want> <path to Javadoc-generated API folder>

Example usage: ./dash_javadocset aws-java-sdk-1.10.20 /Users/tianyil/Downloads/aws-java-sdk-1.10.20/documentation/javadoc

Note: I have a compiled version of javadocset tool, it is executable. Just download it and execute in your folder.