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Apache POI contains support for reading few variants of encrypted office files: Binary formats (.xls, .ppt, .doc, ...) encryption is format-dependent and needs to be implemented per format differently. Use Biff8EncryptionKey.setCurrentUserPassword(String password) to specify the decryption password before opening the file or (where applicable) before saving. Setting a null password before saving r
POI-HSSF and POI-XSSF/SXSSF - Java API To Access Microsoft Excel Format Files HSSF is the POI Project's pure Java implementation of the Excel '97(-2007) file format. XSSF is the POI Project's pure Java implementation of the Excel 2007 OOXML (.xlsx) file format. HSSF and XSSF provides ways to read spreadsheets create, modify, read and write XLS spreadsheets. They provide: low level structures for t
This page provides instructions on how to download and verify the Apache POI release artifacts. There are different versions available depending on how stable your code should be. The latest stable release is Apache POI 5.4.0 Archives of all prior releases Apache POI releases are available under the Apache License, Version 2.0. See the NOTICE file contained in each release artifact for applicable
Capabilities This release of the how-to outlines functionality for the current svn trunk. Those looking for information on previous releases should look in the documentation distributed with that release. HSSF allows numeric, string, date or formula cell values to be written to or read from an XLS file. Also in this release is row and column sizing, cell styling (bold, italics, borders,etc), and s
FileOutputStream out = new FileOutputStream("slideshow.ppt");
Want to use HSSF and XSSF read and write spreadsheets in a hurry? This guide is for you. If you're after more in-depth coverage of the HSSF and XSSF user-APIs, please consult the HOWTO guide as it contains actual descriptions of how to use this stuff. Index of Features How to create a new workbook How to create a sheet How to create cells How to create date cells Working with different types of ce
The Javadocs for the latest (development) version of Apache POI can be accessed online here, or build from a source code checkout by running the javadocs Ant task. The latest (development) Javadocs are generally updated every few weeks, so may lag the most recent development slightly. For recent releases, the Javadocs for the latest stable release each the family can also be browsed online: Apache
7 July 2025 - Source repository switched from Subversion to Git Apache POI switched hosting of the source repository from Subversion to Git After Subversion served the project well for many years, it was time to enable more up-to-date workflows by using more of the features offered by Git-based platforms like GitHub. Therefore the source-code is now officially available at the previous read-only m
The POI library can now be compiled as a Ruby extension, allowing the API to be called from Ruby language programs. Ruby users can therefore read and write OLE2 documents, such as Excel files with ease The bindings are generated by compiling POI with gcj, and generating the Ruby wrapper using SWIG. The aim is the keep the POI api as-is. However, where java standard library objects are used, an eff
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