Hallo,
ich denke da hilft Dir dies weiter (es kann aber bereits eine neuere Version geben):

GETTING THE POI JAVA CLASSES
You can download the Java classes from the Jakarta Web site. To do
that, follow these steps:

a) Navigate to http://jakarta.apache.org/poi/*.

b) Click "Download."

c) A list of "download mirrors" will be displayed. These all have the
same software on them, so pick one that's close to you to get the best
download speeds.

d) On the mirror site, you'll have to choose between "dev"
(development) or "release." The development code will have the latest
and greatest features, but may have bugs in it. The released code has
been tested more thoroughly, but may lag behind in features. For my
company, I chose "release."

e) The next choice will be "bin" or "src." These are the pre-compiled
and "source code" versions of POI, respectively. Rather than compile
it myself, I decided to click "bin."

f) Finally, it lists the files for download. At this time, the latest
version is 2.5.1. The file that I downloaded is called poi-bin-2.5.1-
final-20040804.zip.

g) Inside this ZIP file are the Java classes, documentation, and legal
information. The documentation is in the "docs" subdirectory and the
legal information is in the "legal" subdirectory. The JAR files in the
main directory of the ZIP file are the Java classes themselves.

h) The .JAR files are needed on the iSeries to create Excel documents.
To keep things simple, upload them to the /QIBM/userdata/Java400/ext
directory on the iSeries.

i) If for some reason you're not allowed to put things in this
directory, you can put them elsewhere in the IFS. If you do this, you
must include the JAR files in your Java CLASSPATH. The CLASSPATH is
not necessary if you put them in the location specified in step H,
above.