Read XLSX file in Java [closed]
Apache POI 3.5 have added support to all the OOXML (docx, xlsx, etc.)
See the XSSF sub project
AFAIK there are no xlsx-libraries available yet. But there are some for old xls:
One library is jxls which internally uses the already mentioned POI.
2 other links: Handle Excel files, Java libraries to read and write Excel XLS document files.