What Is poi-5.2.3.jar?

poi-5.2.3.jar is one of the JAR files for Apache POI 5.2.3, which provides an API for Microsoft document files of Word, Excel, PowerPoint, and Visio.

poi-5.2.3.jar supports Apache POI components that read and write Microsoft's OLE 2 Compound document format, which is used in early versions of Microsoft Office tools like Word 97, Excel 97, PowerPoint 97, etc.

poi-5.2.3.jar is distributed as part of the poi-bin-5.2.3-20220909.zip download file.

JAR File Size and Download Location:

JAR name: poi-5.2.3.jar
Target JDK version: 9

File name: poi.jar, poi-5.2.3.jar
File size: 2964641 bytes
Release date: 09-09-2022
Download: Apache POI Website

Here are Java Source Code files for poi-5.2.3.jar:

⏎ org/apache/poi/poifs/dev/POIFSDump.java

/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */
package org.apache.poi.poifs.dev;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.Iterator;

import org.apache.poi.poifs.common.POIFSConstants;
import org.apache.poi.poifs.filesystem.DirectoryEntry;
import org.apache.poi.poifs.filesystem.DocumentInputStream;
import org.apache.poi.poifs.filesystem.DocumentNode;
import org.apache.poi.poifs.filesystem.Entry;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.poifs.filesystem.POIFSStream;
import org.apache.poi.poifs.property.PropertyTable;
import org.apache.poi.poifs.storage.HeaderBlock;
import org.apache.poi.util.IOUtils;

/**
 * Dump internal structure of a OLE2 file into file system
 */
public final class POIFSDump {

    private POIFSDump() {}

    public static void main(String[] args) throws IOException {
        if (args.length == 0) {
            System.err.println("Must specify at least one file to dump");
            System.exit(1);
        }
        
        boolean dumpProps = false, dumpMini = false;
        for (String filename : args) {
            if (filename.equalsIgnoreCase("-dumprops") ||
                    filename.equalsIgnoreCase("-dump-props") ||
                    filename.equalsIgnoreCase("-dump-properties")) {
                dumpProps = true;
                continue;
            }
            if (filename.equalsIgnoreCase("-dumpmini") ||
                    filename.equalsIgnoreCase("-dump-mini") ||
                    filename.equalsIgnoreCase("-dump-ministream") ||
                    filename.equalsIgnoreCase("-dump-mini-stream")) {
                dumpMini = true;
                continue;
            }

            System.out.println("Dumping " + filename);
            try (FileInputStream is = new FileInputStream(filename);
                 POIFSFileSystem fs = new POIFSFileSystem(is)) {
                DirectoryEntry root = fs.getRoot();
                String filenameWithoutPath = new File(filename).getName();
                File dumpDir = new File(filenameWithoutPath + "_dump");
                File file = new File(dumpDir, root.getName());
                if (!file.exists() && !file.mkdirs()) {
                    throw new IOException("Could not create directory " + file);
                }
    
                dump(root, file);
    
                if (dumpProps) {
                    HeaderBlock header = fs.getHeaderBlock();
                    dump(fs, header.getPropertyStart(), "properties", file);
                }
                if (dumpMini) {
                    PropertyTable props = fs.getPropertyTable();
                    int startBlock = props.getRoot().getStartBlock();
                    if (startBlock == POIFSConstants.END_OF_CHAIN) {
                        System.err.println("No Mini Stream in file");
                    } else {
                        dump(fs, startBlock, "mini-stream", file);
                    }
                }
            }
        }
    }
    
    public static void dump(DirectoryEntry root, File parent) throws IOException {
        for(Iterator<Entry> it = root.getEntries(); it.hasNext();){
            Entry entry = it.next();
            if(entry instanceof DocumentNode){
                DocumentNode node = (DocumentNode)entry;
                DocumentInputStream is = new DocumentInputStream(node);
                byte[] bytes = IOUtils.toByteArray(is);
                is.close();

                try (OutputStream out = new FileOutputStream(new File(parent, node.getName().trim()))) {
                    out.write(bytes);
                }
            } else if (entry instanceof DirectoryEntry){
                DirectoryEntry dir = (DirectoryEntry)entry;
                File file = new File(parent, entry.getName());
                if(!file.exists() && !file.mkdirs()) {
                    throw new IOException("Could not create directory " + file);
                }
                dump(dir, file);
            } else {
                System.err.println("Skipping unsupported POIFS entry: " + entry);
            }
        }
    }
    public static void dump(POIFSFileSystem fs, int startBlock, String name, File parent) throws IOException {
        File file = new File(parent, name);
        try (FileOutputStream out = new FileOutputStream(file)) {
            POIFSStream stream = new POIFSStream(fs, startBlock);

            byte[] b = IOUtils.safelyAllocate(fs.getBigBlockSize(), POIFSFileSystem.getMaxRecordLength());
            for (ByteBuffer bb : stream) {
                int len = bb.remaining();
                bb.get(b);
                out.write(b, 0, len);
            }
        }
    }
}

⏎ org/apache/poi/poifs/dev/POIFSDump.java

Or download all of them as a single archive file:

File name: poi-5.2.3-src.zip
File size: 2479830 bytes
Release date: 2022-09-09
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