Add Password Protection to PDF using java

Add Password Protection to PDF using Java

 //Please include following jars
//itextpdf-5.2.1.jar
//bcmail-jdk16-1.46.jar
//bcprov-jdk16-1.46.jar
//bctsp-jdk16-1.46.jar
//-------------------------------------
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.Date;

import com.itextpdf.text.Document;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;

public class GeneratePDF {

 public static void main(String[] args) {
  try {
   System.out.println("--Process started--");
   String usrPwd = "hello";
   String authorPwd = "hello123";
   OutputStream file = new FileOutputStream(new File(
     "c:\\prd\\Test_pdf_file.pdf"));

   Document document = new Document();
   PdfWriter writer = PdfWriter.getInstance(document, file);

   writer.setEncryption(usrPwd.getBytes(), authorPwd.getBytes(),
     PdfWriter.ALLOW_PRINTING, PdfWriter.ENCRYPTION_AES_128);

   document.open();
   document.add(new Paragraph("Hello World, iText"));
   document.add(new Paragraph(new Date().toString()));

   document.close();
   file.close();
   System.out.println("--Process ended--");

  } catch (Exception e) {

   e.printStackTrace();
  }
 }
}

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Merge PDF files using java iText

Merge PDF files using java iText

// Please include the itext-2.1.4.jar in the classpath
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
 
import com.lowagie.text.Document;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
 
public class MergePDF {
 
    public static void main(String[] args) {
        try {
            List<InputStream> pdfs = new ArrayList<InputStream>();
            pdfs.add(new FileInputStream("c:\p1\1.pdf"));
            pdfs.add(new FileInputStream("c:\p1\2.pdf"));
            OutputStream output = new FileOutputStream("c:\p1\merge.pdf");
            MergePDF.concatPDFs(pdfs, output, true);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    public static void concatPDFs(List<InputStream> streamOfPDFFiles,
            OutputStream outputStream, boolean paginate) {
 
        Document document = new Document();
        try {
            List<InputStream> pdfs = streamOfPDFFiles;
            List<PdfReader> readers = new ArrayList<PdfReader>();
            int totalPages = 0;
            Iterator<InputStream> iteratorPDFs = pdfs.iterator();
 
            // Create Readers for the pdfs.
            while (iteratorPDFs.hasNext()) {
                InputStream pdf = iteratorPDFs.next();
                PdfReader pdfReader = new PdfReader(pdf);
                readers.add(pdfReader);
                totalPages += pdfReader.getNumberOfPages();
            }
            // Create a writer for the outputstream
            PdfWriter writer = PdfWriter.getInstance(document, outputStream);
 
            document.open();
            BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA,
                    BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
            PdfContentByte cb = writer.getDirectContent(); // Holds the PDF
            // data
 
            PdfImportedPage page;
            int currentPageNumber = 0;
            int pageOfCurrentReaderPDF = 0;
            Iterator<PdfReader> iteratorPDFReader = readers.iterator();
 
            // Loop through the PDF files and add to the output.
            while (iteratorPDFReader.hasNext()) {
                PdfReader pdfReader = iteratorPDFReader.next();
 
                // Create a new page in the target for each source page.
                while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
                    document.newPage();
                    pageOfCurrentReaderPDF++;
                    currentPageNumber++;
                    page = writer.getImportedPage(pdfReader,
                            pageOfCurrentReaderPDF);
                    cb.addTemplate(page, 0, 0);
 
                    // Code for pagination.
                    if (paginate) {
                        cb.beginText();
                        cb.setFontAndSize(bf, 9);
                        cb.showTextAligned(PdfContentByte.ALIGN_CENTER, ""
                                + currentPageNumber + " of " + totalPages, 520,
                                5, 0);
                        cb.endText();
                    }
                }
                pageOfCurrentReaderPDF = 0;
            }
            outputStream.flush();
            document.close();
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (document.isOpen())
                document.close();
            try {
                if (outputStream != null)
                    outputStream.close();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
    }
}

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Count the PDF Pages using Java

To get number of pages in the PDF

import java.io.*;
import com.lowagie.text.pdf.PdfReader;
 
 
public class PDFSize {
 
//static String PdfName = "C:/pdfCount.pdf";
 
 
   public int PDFPagesCount(String arg1) throws IOException
    {
  
    try{
        PdfReader r = new PdfReader(arg1);
     int NoOfPages =0;  
     NoOfPages =r.getNumberOfPages();
 
     return NoOfPages;
  
   
    }
      
    catch (Exception e)
    {
     System.out.println(e.getMessage());
     return 1;
    }
  
        
    }
 
public static void main(String args[]) throws IOException{
    
  int PDF=0;

 PDFSize pdfsize = new PDFSize();
 
 try {
 // pdfsize.PDFPagesCount(args[0]);
 
  PDF= pdfsize.PDFPagesCount(args[0]);;
  

  //System.out.println(new PDFSize().PDFPagesCount(PdfName));
 } catch (Exception e) {
  e.printStackTrace();
 }
 return PDF;
}
}

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