What Is fop.jar? I got it from the fop-2.7-bin.zip.

fop.jar in fop-2.7-bin.zip is the JAR file for FOP 2.7, which is a print formatter driven by XSL formatting objects (XSL-FO). You can obtain fop.jar from the build folder of the fop-2.7-bin.zip file.

Below is the information about the fop.jar (2.2) file:

JAR File Size and Download Location:

JAR name: fop.jar, fop-2.7.jar
Target JDK version: 1.7
File name: fop.jar
File size: 4442817 bytes
Release date: 20-Jan-2022
Download: Apache FOP Website

Java source code files for fop.jar:

⏎ org/apache/fop/configuration/DefaultConfigurationBuilder.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.
 */

/* $Id: Accessibility.java 1343632 2012-05-29 09:48:03Z vhennebert $ */
package org.apache.fop.configuration;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class DefaultConfigurationBuilder {

    private static final Log LOG = LogFactory.getLog(DefaultConfigurationBuilder.class.getName());

    public DefaultConfiguration build(InputStream confStream) throws ConfigurationException {
        try {
            DocumentBuilder builder = DefaultConfiguration.DBF.newDocumentBuilder();
            Document document = builder.parse(confStream);
            return new DefaultConfiguration(document.getDocumentElement());
        } catch (DOMException e) {
            throw new ConfigurationException("xml parse error", e);
        } catch (ParserConfigurationException e) {
            throw new ConfigurationException("xml parse error", e);
        } catch (IOException e) {
            throw new ConfigurationException("xml parse error", e);
        } catch (SAXException e) {
            throw new ConfigurationException("xml parse error", e);
        } finally {
            try {
                confStream.close();
            } catch (IOException e) {
                throw new IllegalStateException(e);
            }
        }
    }

    public DefaultConfiguration buildFromFile(File file) throws ConfigurationException {
        try {
            DocumentBuilder builder = DefaultConfiguration.DBF.newDocumentBuilder();
            Document document = builder.parse(file);
            return new DefaultConfiguration(document.getDocumentElement());
        } catch (DOMException e) {
            throw new ConfigurationException("xml parse error", e);
        } catch (ParserConfigurationException e) {
            throw new ConfigurationException("xml parse error", e);
        } catch (IOException e) {
            throw new ConfigurationException("xml parse error", e);
        } catch (SAXException e) {
            throw new ConfigurationException("xml parse error", e);
        }
    }
}

⏎ org/apache/fop/configuration/DefaultConfigurationBuilder.java

Or download all of them as a single archive file:

File name: fop-2.7-src.zip
File size: 3401312 bytes
Release date: 2022-01-20
Download 

⇒ "fop" Command in fop-2.7-bin.zip

⇐ What Is fop-2.7-bin.zip

⇑ Download and Installing of FOP 2.x

⇑⇑ FAQ for FOP (Formatting Object Processor)