|Apache | POI||
POI-OpenXML4J - Java API To Access Office Open XML documents
OpenXML4J is the POI Project's pure Java implementation of the Open Packaging Conventions (OPC) defined in ECMA-376.
Every OpenXML file comprises a collection of byte streams called parts, combined into a container called a package. POI OpenXML4J provides a physical implementation of the OPC that uses the Zip file format.
OpenXML4J was originally developed by http://openxml4j.org/ and contributed to POI in 2008. Thanks to the support and guidance of Julien Chable