xlsxjarspackage collects all the external jars required for the
xlxspackage. These external jars are quite large in size (10MB) and have a slow release cycle. By separating the Java and R development, the storage footprint on CRAN is reduced.
The Java library comes from the Apache project, see
http://poi.apache.org/index.html for License and Copyright of
this piece of software. The POI Apache project provides a Java API to
Microsoft Documents (Excel, Word, PowerPoint, Outlook, Visio, etc.)
By using the
rJava package that links R and Java, we can use
the excellent work already done by the folks at the Apache project and
provide this functionality in R.
Current version corresponds to release 3.10 of the POI project.