POI Jar Package Introduction

From official website:

Component	Application Type	Maven Artifactid	Notes
Poifs	OLE2 Filesystem	Poi	Required to work with ole2/poifs based files
Hpsf	OLE2 Property Sets	Poi
Hssf	Excel XLS	Poi	For HSSF only, if common SS are needed see below
Hslf	PowerPoint PPT	Poi-scratchpad
Hwpf	Word DOC	Poi-scratchpad
Hdgf	Visio VSD	Poi-scratchpad
Hpbf	Publisher PUB	Poi-scratchpad
Hsmf	Outlook MSG	Poi-scratchpad
DDF	Escher Common drawings	Poi
Hwmf	WMF drawings	Poi-scratchpad
Openxml4j	OOXML	poi-ooxml plus either poi-ooxml-schemas or ooxml-schemas and ooxml-security	See notes below for differences between these options
Xssf	Excel XLSX	Poi-ooxml
Xslf	PowerPoint PPTX	Poi-ooxml
Xwpf	Word DOCX	Poi-ooxml
Common SL	PowerPoint PPT and PPTX	poi-scratchpad and poi-ooxml	SL code is in the core POI jar, but implementations am in Poi-scratchpad and poi-ooxml.
Common SS	Excel XLS and XLSX	Poi-ooxml	Workbookfactory and friends all require poi-ooxml, not just core poi

This table maps artifacts into the jar file name. "Version-yyyymmdd" is the POI version stamp. You can see what the latest stamp are on the downloads page.

Maven Artifactid	Prerequisites	JAR
Poi	Commons-logging, Commons-codec, log4j	Poi-version-yyyymmdd.jar
Poi-scratchpad	Poi	Poi-scratchpad-version-yyyymmdd.jar
Poi-ooxml	POI, Poi-ooxml-schemas	Poi-ooxml-version-yyyymmdd.jar
Poi-ooxml-schemas	XMLBeans	Poi-ooxml-schemas-version-yyyymmdd.jar
Poi-examples	Poi, Poi-scratchpad, Poi-ooxml	Poi-examples-version-yyyymmdd.jar
Ooxml-schemas	XMLBeans	Ooxml-schemas-1.3.jar
Ooxml-security	XMLBeans For Signing:bcpkix-jdk15on, Bcprov-jdk15on, Xmlsec, Slf4j-api	Ooxml-security-1.1.jar

POI Jar Package Introduction