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/util/HexRead.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.util;

import java.io.*;
import java.util.List;
import java.util.ArrayList;

/**
 * Utilities to read hex from files.
 * TODO - move to test packages
 */
public class HexRead {
    /**
     * This method reads hex data from a filename and returns a byte array.
     * The file may contain line comments that are preceded with a # symbol.
     *
     * @param filename  The filename to read
     * @return The bytes read from the file.
     * @throws IOException If there was a problem while reading the file.
     */
    public static byte[] readData( String filename ) throws IOException {
        File file = new File( filename );
        try (InputStream stream = new FileInputStream(file)) {
            return readData(stream, -1);
        }
    }

    /**
     * Same as readData(String) except that this method allows you to specify sections within
     * a file.  Sections are referenced using section headers in the form:
     * <pre>
     *  [sectioname]
     * </pre>
     *
     * @see #readData(String)
     */
    public static byte[] readData(InputStream stream, String section ) throws IOException {
        try {
            StringBuilder sectionText = new StringBuilder();
            boolean inSection = false;
            int c = stream.read();
            while ( c != -1 ) {
                switch ( c ) {
                    case '[':
                        inSection = true;
                        break;
                    case '\n':
                    case '\r':
                        inSection = false;
                        sectionText = new StringBuilder();
                        break;
                    case ']':
                        inSection = false;
                        if ( sectionText.toString().equals( section ) ) return readData( stream, '[' );
                        sectionText = new StringBuilder();
                        break;
                    default:
                        if ( inSection ) sectionText.append( (char) c );
                }
                c = stream.read();
            }
        } finally {
            stream.close();
        }

        throw new IOException( "Section '" + section + "' not found" );
    }

    public static byte[] readData( String filename, String section ) throws IOException {
        return readData(new FileInputStream( filename ), section);
    }

    @SuppressWarnings("fallthrough")
    static public byte[] readData( InputStream stream, int eofChar )
            throws IOException
    {
        int characterCount = 0;
        byte b = (byte) 0;
        List<Byte> bytes = new ArrayList<>();
        final char a = 'a' - 10;
        final char A = 'A' - 10;
        while ( true ) {
            int count = stream.read();
            int digitValue = -1;
            if ( '0' <= count && count <= '9' ) {
                digitValue = count - '0';
            } else if ( 'A' <= count && count <= 'F' ) {
                digitValue = count - A;
            } else if ( 'a' <= count && count <= 'f' ) {
                digitValue = count - a;
            } else if ( '#' == count ) {
                readToEOL( stream );
            } else if ( -1 == count || eofChar == count ) {
                break;
            }
            // else: ignore the character

            if (digitValue != -1) {
                b <<= 4;
                b += (byte) digitValue;
                characterCount++;
                if ( characterCount == 2 ) {
                    bytes.add( Byte.valueOf( b ) );
                    characterCount = 0;
                    b = (byte) 0;
                }
            }
        }
        Byte[] polished = bytes.toArray(new Byte[0]);
        byte[] rval = new byte[polished.length];
        for ( int j = 0; j < polished.length; j++ ) {
            rval[j] = polished[j].byteValue();
        }
        return rval;
    }

    static public byte[] readFromString(String data) {
        try {
            return readData(new ByteArrayInputStream( data.getBytes(StringUtil.UTF8) ), -1);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    static private void readToEOL( InputStream stream ) throws IOException {
        int c = stream.read();
        while ( c != -1 && c != '\n' && c != '\r' ) {
            c = stream.read();
        }
    }
}

⏎ org/apache/poi/util/HexRead.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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