File Format APIs for Java
Open Source Java APIs for Spreadsheets
Read, Write, Convert & Manipulate Microsoft Excel XLS & XLSX files using Java APIs.
Spreadsheet File Format APIs for Java Include
Apache POI HSSF
HSSF provides the facility to add Excel 'binary spreadsheet format (XLS) processing capabilities to your own Java applications.
XSSF gives Java developers the power to create, read, write and manipulate Excel 2007 OOXML (XLSX) files in Java applications.
Open Source Java Library supports reading and writing XLSX spreadsheet file format, in a fast and scalable way.
Open Source Java Library for Converting Microsoft Excel File Format.
Free Java Library that fully support spreadsheet creation and management. Add & Modify Charts to Excel Workbook, convert spreadsheet to PDF & so on.