docx4j 3.3.0 is currently under development, in branch VERSION_3_3_0 on GitHub:
https://github.com/plutext/docx4j/tree/VERSION_3_3_0
Please see CHANGELOG.md for what is in it, but the most notable enhancement right now is document protection (read only, track revisions etc) for docx/pptx/xlsx, with or without password. For the API, please see https://github.com/plutext/docx4j/blob/ ... tings.java and ProtectDocument.java
We'll publish interim builds from time to time. The current one is ...