how to convert programatically powerpoint to xml and back

Question

I need to convert powerpoint file to a text based file such as xml o html programatically and do some proccesses in it and again convert the textbased file top powerpoint. I prefer to do it with java.

Answer 1

Take a look at this: POI and specifically POI-HSLF

You need to read the ppt and extract the contents and form your xml doc. Post manipulation you need to create back the ppt.