Displaying MS-Office documents and spreadsheets inline in a J2EE application

What's the best way to do this? Essentially, I want to be able to display text files and other MS-Office documents inline and allow the us开发者_开发知识库er to provide comments in context (not in the document but as "metadata" around the document).

There are many versions of the MS formats. So one would probably need to convert all of them to the same formats. Then having a zip with a Content.xml, you can translate it in you own XHTML format. And you can at least can display a simple-styled content.

MS docs -[converter]-> single format -[XSLT+java]-> prepared HTML -[web app]->