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2002-03-15 20:41:58 -05:00
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2002-02-18 11:12:48 -05:00
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<title>PoiFS</title>
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2002-03-15 20:41:58 -05:00
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2002-02-18 11:12:48 -05:00
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<td valign="top" align="left"><a href="http://jakarta.apache.org/index.html"><img hspace="0" vspace="0" border="0" src="images/jakarta-logo.gif"></a></td><td width="100%" valign="top" align="left" bgcolor="#ffffff"><img hspace="0" vspace="0" border="0" align="right" src="images/header.gif"></td>
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2002-02-18 11:12:48 -05:00
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<td colspan="2" bgcolor="#525d76"><span class="c1"><a class="black" href="http://www.apache.org/">www.apache.org ></a><a class="black" href="http://jakarta.apache.org/">jakarta.apache.org ></a><a href="http://jakarta.apache.org/poi/" class="black">jakarta.apache.org/poi</a></span></td>
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2002-02-18 11:12:48 -05:00
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<span class="s1">Navigation</span>
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<br>
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<a class="s1" href="../index.html">Main</a>
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<a class="s1" href="how-to.html">How To</a>
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<br>
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<a class="s1" href="fileformat.html">File System Documentation</a>
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<br>
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<a class="s1" href="usecases.html">Use Cases</a>
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<title>PoiFS</title>
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<td bgcolor="#f3dd61"><span class="title">PoiFS</span></td>
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</table>
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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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<td bgcolor="#525D76"><font color="#ffffff" size="+1"><font face="Arial,sans-serif"><b>Overview</b></font></font></td>
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<tr>
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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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2002-03-15 20:41:58 -05:00
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<table width="100%" border="0" cellspacing="0" cellpadding="0">
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<td align="center"><i>Copyright © 2002 Apache Software Foundation</i></td>
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<td align="right" width="100%"><a href="http://krysalis.org/"><img alt="Krysalis Logo" src="images/krysalis-compatible.png"></a><a href="http://xml.apache.org/cocoon/"><img alt="Cocoon Logo" src="images/built-with-cocoon.png"></a></td>
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