What is Apache POI Java Library?

Apache POI Java library is a set of JAR files for manipulating various file formats based upon the Microsoft Office Open XML standards (OOXML) and Microsoft's OLE 2 Compound Document format (OLE2). In short, you can read and write MS Excel files using Java. In addition, you can read and write MS Word and MS PowerPoint files using Java. Apache POI is your Java Excel solution (for Excel 97-2008).

The name, POI, was originally an acronym for "Poor Obfuscation Implementation", referring humorously to the fact that the file formats seemed to be deliberately obfuscated, but poorly, since they were successfully reverse-engineered.

Releases of Apache POI Java library:

5.2.3    2022-09-16
5.0.0    2021-01-17
4.1.2    2020-07-06
4.0.0    2018-09-05
3.17     2017-09-13
3.15     September 21, 2016
3.14     March 2, 2016
3.13     September 29, 2015
3.12     May 11, 2015
3.11     December 21, 2014
3.10.1   August 18, 2014
3.9      December 3, 2012
3.8      March 26, 2012
3.7      October 29, 2010
3.6      December 14, 2009
3.5      September 28, 2009
3.2      October 19, 2008
3.1      June 29, 2008
3.0.2    February 4, 2008
2.5.1    February 29, 2004
2.0      January 26, 2004
1.5.1    June 16, 2002
1.2.0    January 19, 2002
1.1.0    January 4, 2002
1.0.2    January 11, 2002

For more information, see Apache POI home page.

⇒ Components of Apache POI Java Library

⇐ Downloading and Installing Apache POI Java Library

⇑ Downloading and Installing Apache POI Java Library

⇑⇑ FAQ for Apache POI (Poor Obfuscation Implementation)