If you mean XML-tablea file like this (created using the Save As option in Excel):
<?xml version="1.0"?>
<?mso-application progid="Excel.Sheet"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:x="urn:schemas-microsoft-com:office:excel"
xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:html="http://www.w3.org/TR/REC-html40">
<DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
Then the answer is: No, you cannot open it using Apache POI .
POI supports Microsoft Excel 97 (-2007) (BIFF8) .xls and Microsoft Excel XML (2007+) (OOXML) .xlsx file formats.
- , - ZIP XML .
( : .xlsx.zip ZIP)
.NET/#, XML- Excel, POI: http://spreadsheet.codeplex.com/
, , Google .