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/render/RendererConfig.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.
 */

/* $Id$ */

package org.apache.fop.render;

import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.configuration.Configuration;
import org.apache.fop.fonts.FontConfig;

/**
 * Implementations of this interface have all the renderer-specific configuration data found in the
 * FOP-conf. This object is just a data object that is created by the {@link RendererConfigParser}
 * when the FOP conf is parsed.
 */
public interface RendererConfig {

    /**
     * Returns the render-specific font configuration information.
     * @return the font config
     */
    FontConfig getFontInfoConfig();

    /**
     * Implementations of this interface parse the relevant renderer-specific configuration data
     * within the FOP-conf and create a {@link RendererConfig}.
     */
    public interface RendererConfigParser {

        /**
         * Builds the object that contains the renderer configuration data.
         *
         * @param userAgent the user agent
         * @param rendererConfiguration the Avalon config object for parsing the data
         * @return the configuration data object
         * @throws FOPException if an error occurs while parsing the fop conf
         */
        RendererConfig build(FOUserAgent userAgent, Configuration rendererConfiguration) throws FOPException;

        /**
         * The MIME type of the renderer.
         *
         * @return the mime type
         */
        String getMimeType();
    }
}

⏎ org/apache/fop/render/RendererConfig.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)