What Is poi-5.2.3.jar?

What Is poi-5.2.3.jar?

✍: FYIcenter.com

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:


/* ====================================================================
   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


   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */
package org.apache.poi.hpsf;

import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.poi.util.CodePageUtil;
import org.apache.poi.util.IOUtils;
import org.apache.poi.util.Internal;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.LittleEndianByteArrayInputStream;
import org.apache.poi.util.LittleEndianConsts;
import org.apache.poi.util.StringUtil;

public class UnicodeString {
    private static final Logger LOG = LogManager.getLogger(UnicodeString.class);

    private byte[] _value;

    public void read(LittleEndianByteArrayInputStream lei) {
        final int length = lei.readInt();
        final int unicodeBytes = length*2;
        _value = IOUtils.safelyAllocate(unicodeBytes, CodePageString.getMaxRecordLength());
        // If Length is zero, this field MUST be zero bytes in length. If Length is
        // nonzero, this field MUST be a null-terminated array of 16-bit Unicode characters, followed by
        // zero padding to a multiple of 4 bytes. The string represented by this field SHOULD NOT
        // contain embedded or additional trailing null characters.
        if (length == 0) {

        final int offset = lei.getReadIndex();

        if (_value[unicodeBytes-2] != 0 || _value[unicodeBytes-1] != 0) {
            String msg = "UnicodeString started at offset #" + offset + " is not NULL-terminated";
            throw new IllegalPropertySetDataException(msg);
    public byte[] getValue() {
        return _value;

    public String toJavaString() {
        if ( _value.length == 0 ) {
            return null;

        String result = StringUtil.getFromUnicodeLE( _value, 0, _value.length >> 1 );

        final int terminator = result.indexOf( '\0' );
        if ( terminator == -1 ) {
            LOG.atWarn().log("String terminator (\\0) for UnicodeString property value not found. " +
                    "Continue without trimming and hope for the best.");
            return result;
        if ( terminator != result.length() - 1 ) {
            LOG.atWarn().log("String terminator (\\0) for UnicodeString property value occured before the end of " +
                    "string. Trimming and hope for the best.");
        return result.substring( 0, terminator );

    public void setJavaValue( String string ) throws UnsupportedEncodingException {
        _value = CodePageUtil.getBytesInCodePage(string + "\0", CodePageUtil.CP_UNICODE);

    public int write( OutputStream out ) throws IOException {
        LittleEndian.putUInt( _value.length / 2, out );
        out.write( _value );
        return LittleEndianConsts.INT_SIZE + _value.length;


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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