[Spreadsheet 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 Aspose.Cells for Java A pure Java class library to read, write, edit, render, manipulate, print and convert Excel spreadsheet files without using Microsoft Excel. Apache POI HSSF HSSF provides the facility to add Excel 'binary spreadsheet format (XLS) processing capabilities to your own Java applications. Apache POI-XSSF XSSF gives Java developers the power to create, read, write and manipulate Excel 2007 OOXML (XLSX) files in Java applications. FastExcel Open Source Java Library supports reading and writing XLSX spreadsheet file format, in a fast and scalable way. JXLS JXLS is a free Java Library for Excel Report Generation that uses special markup in Excel templates to define output formatting. DOCX4J Open Source Java Library supports reading and writing XLSX spreadsheet file format, in a fast and scalable way. Documents4J Open Source Java Library for Converting Microsoft Excel File Format. GcExcel-Java Free Java Library that fully support spreadsheet creation and management. Add & Modify Charts to Excel Workbook, convert spreadsheet to PDF & so on.]