I took the sample xlsx parser that converts to CVS (XLSX2CSV), tweaked it a little, and made it into a general-purpose xlsx SAX parser. It's written in Groovy, and uses a closure for a callback. It's fairly simple, but it serves my purposes, and I thought others might want to take it and build on it, if no one's already done such a thing.
Would there be any interest in my sharing it back? If so, how would I contribute it? I have a test case as well.
