encrypt_pdf.java

iText可以制作中文PDF文件的JAVA源程序最新版下载

package com.lowagie.tools;

import com.lowagie.text.pdf.PdfEncryptor;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;

import java.io.FileOutputStream;

/** Encrypts a PDF document. It needs iText (http://www.lowagie.com/iText).
 * @author Paulo Soares ([e-mail])
 */
public class encrypt_pdf {
    
    private final static int INPUT_FILE = 0;
    private final static int OUTPUT_FILE = 1;
    private final static int USER_PASSWORD = 2;
    private final static int OWNER_PASSWORD = 3;
    private final static int PERMISSIONS = 4;
    private final static int STRENGTH = 5;
    private final static int permit[] = {
        PdfWriter.AllowPrinting,
        PdfWriter.AllowModifyContents,
        PdfWriter.AllowCopy,
        PdfWriter.AllowModifyAnnotations,
        PdfWriter.AllowFillIn,
        PdfWriter.AllowScreenReaders,
        PdfWriter.AllowAssembly,
        PdfWriter.AllowDegradedPrinting};

    private static void usage() {
        System.out.println("usage: input_file output_file user_password owner_password permissions 128|40");
        System.out.println("permissions is 8 digit long 0 or 1. Each digit has a particular security function:");
        System.out.println();
        System.out.println("AllowPrinting");
        System.out.println("AllowModifyContents");
        System.out.println("AllowCopy");
        System.out.println("AllowModifyAnnotations");
        System.out.println("AllowFillIn (128 bit only)");
        System.out.println("AllowScreenReaders (128 bit only)");
        System.out.println("AllowAssembly (128 bit only)");
        System.out.println("AllowDegradedPrinting (128 bit only)");
        System.out.println("Example permissions to copy and print would be: 10100000");
    }
    
    public static void main (String args[]) {
        System.out.println("PDF document encryptor");
        if (args.length < 6 || args[PERMISSIONS].length() != 8) {
            usage();
            return;
        }
        try {
            int permissions = 0;
            String p = args[PERMISSIONS];
            for (int k = 0; k < p.length(); ++k) {
                permissions |= (p.charAt(k) == '0' ? 0 : permit[k]);
            }
            System.out.println("Reading " + args[INPUT_FILE]);
            PdfReader reader = new PdfReader(args[INPUT_FILE]);
            System.out.println("Writing " + args[OUTPUT_FILE]);
            PdfEncryptor.encrypt(reader, new FileOutputStream(args[OUTPUT_FILE]),
                args[USER_PASSWORD].getBytes(), args[OWNER_PASSWORD].getBytes(), permissions, args[STRENGTH].equals("128"));
            System.out.println("Done.");
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}