This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I wouldn't call that "a solution". The mere fact that Office 2007 formats are a zipped collection of XML files, and can be treated as such, is not at all the same as what you gain by using a library such as jExcelAPI for Office 2003 files, and POI for Office 2003 and Office 2007 files.