split.java

来自「java编程java编程java编程java编程java编程java编程java」· Java 代码 · 共 102 行

/*
 * $Id: Split.java,v 1.3 2002/02/28 09:08:58 blowagie Exp $
 * $Name:  $
 *
 * This code is free software. It may only be copied or modified
 * if you include the following copyright notice:
 *
 * --> Copyright 2002 by Bruno Lowagie <--
 *
 * This code is part of the 'iText Tutorial'.
 * You can find the complete tutorial at the following address:
 * http://www.lowagie.com/iText/tutorial/
 *
 * This code 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.
 *
 * [e-mail]
 */

import java.io.*;

import com.lowagie.text.*;
import com.lowagie.text.pdf.*;

public class Split extends java.lang.Object {
    
    /**
     * @param args the command line arguments
     */
    public static void main (String args[]) {
        if (args.length != 4) {
            System.err.println("This tools needs 4 parameters:\njava Split srcfile destfile1 destfile2 pagenumber");
        }
        else {
            try {
                int pagenumber = Integer.parseInt(args[3]);
                
                // we create a reader for a certain document
                PdfReader reader = new PdfReader(args[0]);
                // we retrieve the total number of pages
                int n = reader.getNumberOfPages();
                System.out.println("There are " + n + " pages in the original file.");
                
                if (pagenumber < 2 || pagenumber > n) {
                    throw new DocumentException("You can't split this document at page " + pagenumber + "; there is no such page.");
                }
                
                // step 1: creation of a document-object
                Document document1 = new Document(reader.getPageSizeWithRotation(1));
                Document document2 = new Document(reader.getPageSizeWithRotation(pagenumber));
                // step 2: we create a writer that listens to the document
                PdfWriter writer1 = PdfWriter.getInstance(document1, new FileOutputStream(args[1]));
                PdfWriter writer2 = PdfWriter.getInstance(document2, new FileOutputStream(args[2]));
                // step 3: we open the document
                document1.open();
                PdfContentByte cb1 = writer1.getDirectContent();
                document2.open();
                PdfContentByte cb2 = writer2.getDirectContent();
                PdfImportedPage page;
                int rotation;
                int i = 0;
                // step 4: we add content
                while (i < pagenumber - 1) {
                    i++;
                    document1.setPageSize(reader.getPageSizeWithRotation(i));
                    document1.newPage();
                    page = writer1.getImportedPage(reader, i);
                    rotation = reader.getPageRotation(i);
                    if (rotation == 90 || rotation == 270) {
                        cb1.addTemplate(page, 0, -1f, 1f, 0, 0, reader.getPageSizeWithRotation(i).height());
                    }
                    else {
                        cb1.addTemplate(page, 1f, 0, 0, 1f, 0, 0);
                    }
                }
                while (i < n) {
                    i++;
                    document2.setPageSize(reader.getPageSizeWithRotation(i));
                    document2.newPage();
                    page = writer2.getImportedPage(reader, i);
                    rotation = reader.getPageRotation(i);
                    if (rotation == 90 || rotation == 270) {
                        cb2.addTemplate(page, 0, -1f, 1f, 0, 0, reader.getPageSizeWithRotation(i).height());
                    }
                    else {
                        cb2.addTemplate(page, 1f, 0, 0, 1f, 0, 0);
                    }
                    System.out.println("Processed page " + i);
                }
                // step 5: we close the document
                document1.close();
                document2.close();
            }
            catch(Exception e) {
                System.err.println(e.getClass().getName() + ": " + e.getMessage());
            }
        }
    }
    
}