poifsviewer.java

Office格式转换代码

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache POI" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache POI", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.poi.poifs.dev;

import java.io.*;

import java.util.*;

import org.apache.poi.poifs.filesystem.POIFSFileSystem;

/**
 * A simple viewer for POIFS files
 *
 * @author Marc Johnson (mjohnson at apache dot org)
 */

public class POIFSViewer
{

    /**
     * Display the contents of multiple POIFS files
     *
     * @param args the names of the files to be displayed
     */

    public static void main(final String args[])
    {
        if (args.length < 0)
        {
            System.err.println("Must specify at least one file to view");
            System.exit(1);
        }
        boolean printNames = (args.length > 1);

        for (int j = 0; j < args.length; j++)
        {
            viewFile(args[ j ], printNames);
        }
    }

    private static void viewFile(final String filename,
                                 final boolean printName)
    {
        if (printName)
        {
            StringBuffer flowerbox = new StringBuffer();

            flowerbox.append(".");
            for (int j = 0; j < filename.length(); j++)
            {
                flowerbox.append("-");
            }
            flowerbox.append(".");
            System.out.println(flowerbox);
            System.out.println("|" + filename + "|");
            System.out.println(flowerbox);
        }
        try
        {
            POIFSViewable fs      =
                new POIFSFileSystem(new FileInputStream(filename));
            List          strings = POIFSViewEngine.inspectViewable(fs, true,
                                        0, "  ");
            Iterator      iter    = strings.iterator();

            while (iter.hasNext())
            {
                System.out.print(iter.next());
            }
        }
        catch (IOException e)
        {
            System.out.println(e.getMessage());
        }
    }
}   // end public class POIFSViewer