Index > JavaからPDFファイルを扱う(PDFファイルのアクロバットリーダでの表示、印刷など)
Sun, May 20, 2007

JavaからPDFファイルを扱う(PDFファイルのアクロバットリーダでの表示、印刷など)

Javaで書いたプログラムからPDFを扱う場合に便利なコードが iTextのソースアーカイブに入っていたのでメモ。 すぐ利用できるようにJavadocも用意。

Javaで印刷するには、Java2Dを使って描画して印刷、という普通の方法が あります。 しかし、場合によっては、iTextを使って、PDFを生成して、 このクラス(Executable.java)経由で印刷ダイアログを出して、印刷、 という方が便利な場合もあるかと思います。

com.lowagie.tools.Executable.java

/*
 * $Id: Executable.java,v 1.7 2006/09/12 08:27:37 blowagie Exp $
 * $Name:  $
 *
 * Copyright 2005 by Bruno Lowagie / Roger Mistelli
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */
package com.lowagie.tools;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;

/**
 * This class enables you to call an executable that will show a PDF file.
 */
public class Executable {

    /**
     * The path to Acrobat Reader.
     */
    public static String acroread = null;


    /**
     * Performs an action on a PDF document.
     * @param fileName
     * @param parameters
     * @param waitForTermination
     * @return a process
     * @throws IOException
     */
    private static Process action(final String fileName,
            String parameters, boolean waitForTermination) throws IOException {
        Process process = null;
        if (parameters.trim().length() > 0) {
            parameters = " " + parameters.trim();
        }
        else {
            parameters = "";
        }
        if (acroread != null) {
            process = Runtime.getRuntime().exec(
                    acroread + parameters + " \"" + fileName + "\"");
        }
        else if (isWindows()) {
            if (isWindows9X()) {
                process = Runtime.getRuntime().exec(
                        "command.com /C start acrord32" + parameters + " \"" + fileName + "\"");
            }
            else {
                process = Runtime.getRuntime().exec(
                    "cmd /c start acrord32" + parameters + " \"" + fileName + "\"");
            }
        }
        else if (isMac()) {
            if (parameters.trim().length() == 0) {
                process = Runtime.getRuntime().exec(
                    new String[] { "/usr/bin/open", fileName });
            }
            else {
                process = Runtime.getRuntime().exec(
                        new String[] { "/usr/bin/open", parameters.trim(), fileName });
            }
        }
        try {
            if (process != null && waitForTermination)
                process.waitFor();
        } catch (InterruptedException ie) {
        }
        return process;
    }

    /**
     * Opens a PDF document.
     * @param fileName
     * @param waitForTermination
     * @return a process
     * @throws IOException
     */
    public static final Process openDocument(String fileName,
            boolean waitForTermination) throws IOException {
        return action(fileName, "", waitForTermination);
    }

    /**
     * Opens a PDF document.
     * @param file
     * @param waitForTermination
     * @return a process
     * @throws IOException
     */
    public static final Process openDocument(File file,
            boolean waitForTermination) throws IOException {
        return openDocument(file.getAbsolutePath(), waitForTermination);
    }

    /**
     * Opens a PDF document.
     * @param fileName
     * @return a process
     * @throws IOException
     */
    public static final Process openDocument(String fileName) throws IOException {
        return openDocument(fileName, false);
    }

    /**
     * Opens a PDF document.
     * @param file
     * @return a process
     * @throws IOException
     */
    public static final Process openDocument(File file) throws IOException {
        return openDocument(file, false);
    }

    /**
     * Prints a PDF document.
     * @param fileName
     * @param waitForTermination
     * @return a process
     * @throws IOException
     */
    public static final Process printDocument(String fileName,
            boolean waitForTermination) throws IOException {
        return action(fileName, "/p", waitForTermination);
    }

    /**
     * Prints a PDF document.
     * @param file
     * @param waitForTermination
     * @return a process
     * @throws IOException
     */
    public static final Process printDocument(File file,
            boolean waitForTermination) throws IOException {
        return printDocument(file.getAbsolutePath(), waitForTermination);
    }

    /**
     * Prints a PDF document.
     * @param fileName
     * @return a process
     * @throws IOException
     */
    public static final Process printDocument(String fileName) throws IOException {
        return printDocument(fileName, false);
    }

    /**
     * Prints a PDF document.
     * @param file
     * @return a process
     * @throws IOException
     */
    public static final Process printDocument(File file) throws IOException {
        return printDocument(file, false);
    }

    /**
     * Prints a PDF document without opening a Dialog box.
     * @param fileName
     * @param waitForTermination
     * @return a process
     * @throws IOException
     */
    public static final Process printDocumentSilent(String fileName,
            boolean waitForTermination) throws IOException {
        return action(fileName, "/p /h", waitForTermination);
    }

    /**
     * Prints a PDF document without opening a Dialog box.
     * @param file
     * @param waitForTermination
     * @return a process
     * @throws IOException
     */
    public static final Process printDocumentSilent(File file,
            boolean waitForTermination) throws IOException {
        return printDocumentSilent(file.getAbsolutePath(), waitForTermination);
    }

    /**
     * Prints a PDF document without opening a Dialog box.
     * @param fileName
     * @return a process
     * @throws IOException
     */
    public static final Process printDocumentSilent(String fileName) throws IOException {
        return printDocumentSilent(fileName, false);
    }

    /**
     * Prints a PDF document without opening a Dialog box.
     * @param file
     * @return a process
     * @throws IOException
     */
    public static final Process printDocumentSilent(File file) throws IOException {
        return printDocumentSilent(file, false);
    }

    /**
     * Launches a browser opening an URL.
     *
     * @param url the URL you want to open in the browser
     * @throws IOException
     */
    public static final void launchBrowser(String url) throws IOException {
        try {
            if (isMac()) {
                Class macUtils = Class.forName("com.apple.mrj.MRJFileUtils");
                Method openURL = macUtils.getDeclaredMethod("openURL", new Class[] {String.class});
                openURL.invoke(null, new Object[] {url});
            }
            else if (isWindows())
                Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler " + url);
            else { //assume Unix or Linux
                String[] browsers = {
                   "firefox", "opera", "konqueror", "mozilla", "netscape" };
                String browser = null;
                for (int count = 0; count < browsers.length && browser == null; count++)
                   if (Runtime.getRuntime().exec(new String[] {"which", browsers[count]}).waitFor() == 0)
                      browser = browsers[count];
                if (browser == null)
                   throw new Exception("Could not find web browser.");
                else
                   Runtime.getRuntime().exec(new String[] {browser, url});
                }
             }
          catch (Exception e) {
             throw new IOException("Error attempting to launch web browser");
          }
    }

    /**
     * Checks the Operating System.
     * 
     * @return true if the current os is Windows
     */
    public static boolean isWindows() {
        String os = System.getProperty("os.name").toLowerCase();
        return os.indexOf("windows") != -1 || os.indexOf("nt") != -1;
    }

    /**
     * Checks the Operating System.
     * 
     * @return true if the current os is Windows
     */
    public static boolean isWindows9X() {
        String os = System.getProperty("os.name").toLowerCase();
        return os.equals("windows 95") || os.equals("windows 98");
    }

    /**
     * Checks the Operating System.
     * 
     * @return true if the current os is Apple
     */
    public static boolean isMac() {
        String os = System.getProperty("os.name").toLowerCase();
        return os.indexOf("mac") != -1;
    }

    /**
     * Checks the Operating System.
     * 
     * @return true if the current os is Linux
     */
    public static boolean isLinux() {
        String os = System.getProperty("os.name").toLowerCase();
        return os.indexOf("linux") != -1;
    }
}

Executableクラスの使い方

使い方といっても、とても簡単なので、 iText の Javadoc を見ればわかる話ですが、

たとえば、以下のコードを実行すると ウインドウズ標準に印刷ダイアログを出して印刷を促すことができます。

File file=new File("test.pdf");
com.lowagie.tools.Executable.printDocument(file);
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