Java Platform SE 7
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Getting Involved
Component APIs
Low-level Component APIs
Apache Wide
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Apache POI - the Java API for Microsoft Documents
Project News
15 September 2017 - POI 3.17 available
The Apache POI team is pleased to announce the release of 3.17.
Featured are a handful of new areas of functionality and numerous bug fixes.
A summary of changes is available in the
A full list of changes is available in the .
People interested should also follow the
to track progress.
page for more details.
POI 3.17 is the last release to support Java 6. The next feature-release will be 4.0.0 and will reqiure Java 8 or newer.
15 August 2017 - Initial support for JDK 9
We did some work to verify that compilation with Java 9 is working and
that all unit-tests pass.
See the details in the .
20 March 2017 - CVE- - Possible DOS (Denial of Service) in Apache POI versions prior to 3.15
Apache POI in versions prior to release 3.15 allows remote attackers to cause a denial of service (CPU consumption)
via a specially crafted OOXML file, aka an XML Entity Expansion (XEE) attack.
Users with applications which accept content from external or untrusted sources are advised to upgrade to
Apache POI 3.15 or newer.
Thanks to Xiaolong Zhu and Huijun Chen from Huawei Technologies Co., Ltd. for reporting the vulnerability.
Mission Statement
The Apache POI Project's mission is to create and maintain Java APIs for manipulating various file formats
based upon the 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). We have a complete API for porting other OOXML and OLE2 formats and welcome others to participate.
OLE2 files include most Microsoft Office files such as XLS, DOC, and PPT as well as MFC serialization API based file formats.
The project provides APIs for the
Office OpenXML Format is the new standards based XML file format found in Microsoft Office 2007 and 2008.
This includes XLSX, DOCX and PPTX. The project provides a low level API to support the Open Packaging Conventions
For each MS Office application there exists a component module that attempts to provide a common high level Java api to both OLE2 and OOXML
document formats. This is most developed for .
Work is progressing for
The project has some support for . Microsoft opened the specifications
to this format in October 2007. We would welcome contributions.
There are also projects for
As a general policy we collaborate as much as possible with other projects to
provide this functionality.
Examples include:
which there are serializers for HSSF;
with whom we collaborate in documenting the
for which we provide format interpretors.
When practical, we donate
components directly to those projects for POI-enabling them.
Why should I use Apache POI?
A major use of the Apache POI api is for
applications
such as web spiders, index builders, and content management systems.
So why should you use POIFS, HSSF or XSSF?
You'd use POIFS if you had a document written in OLE 2 Compound Document Format, probably written using
MFC, that you needed to read in Java. Alternatively, you'd use POIFS to write OLE 2 Compound Document Format
if you needed to inter-operate with software running on the Windows platform. We are not just bragging when
we say that POIFS is the most complete and correct implementation of this file format to date!
You'd use HSSF if you needed to read or write an Excel file using Java (XLS). You'd use
XSSF if you need to read or write an OOXML Excel file using Java (XLSX). The combined
SS interface allows you to easily read and write all kinds of Excel files (XLS and XLSX)
using Java. Additionally there is a specialized SXSSF implementation which allows to write
very large Excel (XLSX) files in a memory optimized way.
Components
The Apache POI Project provides several component modules some of which may not be of interest to you.
Use the information on our
page to determine which
jar files to include in your classpath.
Contributing
So you'd like to contribute to the project? Great! We need enthusiastic,
hard-working, talented folks to help us on the project, no matter your
background. So if you're motivated, ready, and have the time: Download the
source from the
, join the
, and we'll be happy to
help you get started on the project!
To view the
tasks, an internet connection is required.
Please read our .
When your contribution is ready submit a patch to our
by&Andrew C. Oliver,&Glen Stampoultzis,&Avik Sengupta,&Rainer Klute,&David Fisher}