parsing - Spreadsheet Parser in Java/Groovy -

Hello I am looking to parse spreadsheets (XLS / ODS) in Groovy I use Ruby library for Ruby And I was trying to see the same work in Groove because Java has already been installed on a development server, and I would like to keep the number of technologies on the server in the simplest core.

I know that the ODS format is XML XML and can be parsed in this way, but I would like to process the file using spreadsheet concepts, not with XML concepts.

The ability to process XLS files is not important, but I have to save several XLS files in ODS (as it is for parsing data from customers).

Thanks

I will suggest access to .xls files.

I have never had to work with .ods format, so there is no information on that.