2002-02-18 11:12:48 -05:00
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<title>PoiFS</title>
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<font face="arial,helvetica,sanserif">
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<font size="+1" color="#000000">Navigation</font><font size="-1">
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<ul>
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<li>
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<a href="../index.html"><font size="-1">Main</font></a>
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</li>
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<li>
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<a href="how-to.html"><font size="-1">How To</font></a>
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<li>
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2002-02-23 08:48:22 -05:00
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<a href="fileformat.html"><font size="-1">File System Documentation</font></a>
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<li>
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2002-02-18 11:12:48 -05:00
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<a href="usecases.html"><font size="-1">Use Cases</font></a>
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</li>
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</ul>
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</font>
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<br>
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</font></td><td align="left" valign="top" width="*">
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<title>PoiFS</title>
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<center>
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<table width="80%">
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<td bgcolor="#F3DD61"><font face="Arial,sans-serif" size="+1">
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<center>
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<b>PoiFS</b>
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</center>
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</font></td>
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</table>
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</center>
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<font size="-2" color="#000000">
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<p>
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<a href="mailto:"></a>
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</p>
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</font>
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<br>
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<div align="right">
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<table cellspacing="0" cellpadding="2" border="0" width="100%">
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<td bgcolor="#525D76"><font color="#ffffff" size="+1"><font face="Arial,sans-serif"><b>Overview</b></font></font></td>
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<br>
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<p align="justify">POIFS is a pure Java implementation of the OLE 2 Compound
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Document format.</p>
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<p align="justify">By definition, all APIs developed by the POI project are
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based somehow on the POIFS API.</p>
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<p align="justify">A common confusion is on just what POIFS buys you or what OLE
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2 Compound Document format is exactly. POIFS does not buy you
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DOC, or XLS, but is necessary to generate or read DOC or XLS
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files. You see, all file formats based on the OLE 2 Compound
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Document Format have a common structure. The OLE 2 Compound
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Document Format is essentially a convoluted archive
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format. Think of POIFS as a "zip" library. Once you can get
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the data in a zip file you still need to interpret the
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data. As a general rule, while all of our formats <b>use</b>
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POIFS, most of them attempt to abstract you from it. There
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are some circumstances where this is not possible, but as a
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general rule this is true.</p>
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<p align="justify">If you're an end user type just looking to generate XLS
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files, then you'd be looking for HSSF not POIFS; however, if
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you have legacy code that uses MFC property sets, POIFS is
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for you! Regardless, you may or may not need to know how to
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use POIFS but ultimately if you use technologies that come
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from the POI project, you're using POIFS underneith. Perhaps
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we should have a branding campaign "POIFS Inside!". ;-)</p>
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<p align="justify">TODO: copy POIFS docs and port to XML (in progress). For now
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please reference <a href="http://poi.sourceforge.net">old
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site</a>.</p>
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</td>
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</table>
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</div>
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<br>
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</td>
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</tr>
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</table>
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<br>
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<table cellpadding="0" cellspacing="0" border="0" width="100%">
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<tr>
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<td>
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<hr size="1" noshade="">
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</td>
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<td align="center"><font color="#525D76" size="-1" face="arial,helvetica,sanserif"><i>
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Copyright ©2002 Apache Software Foundation
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</i></font></td><td width="5%" align="right"><img src="images/cocoon2-small.jpg" align="right" border="0" vspace="0" hspace="0"></td>
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</html>
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