How to Edit Existing PDF

Question

Hi... i am try to edit existing pdf in itext any one can help me this sending code.......

Answer 1

Using Itext i want to remove some content in the PDF
This is my code i want to Edit or Remove some text in the Pdf
package view;
//import com.itextpdf.text.BaseColor;
//import com.itextpdf.text.DocumentException;
//import com.itextpdf.text.pdf.PdfContentByte;
//import com.itextpdf.text.pdf.PdfCopyFields;
//import com.itextpdf.text.pdf.PdfStamper;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfCopyFields;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfNumber;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;
import java.awt.Color;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class SplitingFlat {
    public static void main(String[] args) {
        String fileName =
            "D://OMR//OMRpdf//FlatFlies//EligibilityLists_Flat.pdf";
        splitPDFFile(fileName);
        rotateFlatPDF();
        markPdf();
        mergeFlatPdf();
    public static List splitPDFFile(String fileName) {
        List list = new ArrayList();
        int startPageNo[] =
        { 1, 29, 47, 67, 85, 133, 179, 197, 225, 243, 277, 295, 319, 337, 365,
          393, 419, 439, 471, 491, 513 };
        int endPageNo[] =
        { 28, 46, 66, 84, 132, 178, 196, 224, 242, 276, 294, 318, 336, 364,
          392, 418, 438, 470, 490, 512, 532 };
        try { /**
                 * Read the input PDF file
            PdfReader reader = new PdfReader(fileName);
            int totalPages = reader.getNumberOfPages();
            int split = 0;
            for (int i = 0; i < endPageNo.length; i++) {
                for (int pageNum = 1; pageNum <= totalPages;
                     pageNum += endPageNo[i]) {
                    if (pageNum == 1) {
                        pageNum = startPageNo[i];
                    split++;
                    String outFile =
                        "D://OMR//OMRpdf//flat//split//Flat-split-" + split +
                        ".pdf";
                    Document document =
                        new Document(reader.getPageSizeWithRotation(1));
                    PdfCopy writer =
                        new PdfCopy(document, new FileOutputStream(outFile));
                    document.open();
                    int tempPageCount = 0;
                    int number = endPageNo[i] - pageNum;
                    for (int offset = 0;
                         offset < number && (pageNum + offset) <= totalPages;
                         offset++) {
                        PdfImportedPage page =
                            writer.getImportedPage(reader, pageNum + offset);
                        writer.addPage(page);
                        tempPageCount++;
                    document.close();
                    writer.close();
                    list.add(outFile);
                    break;
        } catch (Exception e) {
            e.printStackTrace();
        return list;
    private static void rotateFlatPDF() {
        String pdfFolderPath = "D:\\OMR\\OMRpdf\\flat\\split\\";
        int split = 1;
        File pdfFolder = new File(pdfFolderPath);
        if (pdfFolder != null && pdfFolder.isDirectory()) {
            String[] pdfFileNames = pdfFolder.list();
            if (pdfFileNames != null && pdfFileNames.length > 0) {
                int documentNumber = 0;
                for (String pdfFileName : pdfFileNames) {
                    File pdfFile =
                        new File(pdfFolderPath + File.separator + pdfFileName);
                    if (pdfFile.isFile()) {
                        documentNumber++;
                        PdfReader pdfReader;
                        String opFile =
                            "D:\\OMR\\OMRpdf\\flat\\rotate\\" + "DocumentSplitRotate-" +
                            split + ".pdf";
                        try {
                            pdfReader =
                                    new PdfReader(pdfFolderPath + File.separator +
                                                  pdfFileName);
                            int n = pdfReader.getNumberOfPages();
                            int rot;
                            PdfDictionary pageDict;
                            for (int i = 1; i <= n; i++) {
                                rot = pdfReader.getPageRotation(i);
                                pageDict = pdfReader.getPageN(i);
                                pageDict.put(PdfName.ROTATE,
                                             new PdfNumber(rot - 90));
                            PdfStamper stamper =
                                new PdfStamper(pdfReader, new FileOutputStream(opFile));
                            stamper.close();
                            pdfReader.close();
                            split++;
                        } catch (IOException e) {
                        } catch (DocumentException e) {
    public static void markPdf() {
        try {
            //Flat
            String pdfFolderPath = "D:\\OMR\\OMRpdf\\flat\\rotate";
            File pdfFolder = new File(pdfFolderPath);
            if (pdfFolder != null && pdfFolder.isDirectory()) {
                String[] pdfFileNames = pdfFolder.list();
                if (pdfFileNames != null && pdfFileNames.length > 0) {
                    int documentNumber = 0;
                    for (String pdfFileName : pdfFileNames) {
                        File pdfFile =
                            new File(pdfFolderPath + File.separator +
                                     pdfFileName);
                        if (pdfFile.isFile()) {
                            documentNumber++;
                            PdfReader pdfReader =
                                new PdfReader(pdfFolderPath + File.separator +
                                              pdfFileName);
                            int pageCount = pdfReader.getNumberOfPages();
                                String outputFileName =
    "D:\\OMR\\OMRpdf\\flat\\mark\\" +File.separator +pdfFileName.substring(0, pdfFileName.lastIndexOf(".pdf")) +
                            "_OMR_Marked.pdf";
                            FileOutputStream fileOutputStream =
                            new FileOutputStream(outputFileName);
                            PdfStamper pdfStamper =
                            new PdfStamper(pdfReader,
                                           fileOutputStream);
                            for (int i = 1; i <= pageCount; i++) {
                            PdfContentByte cb =
                                pdfStamper.getOverContent(i);
                            cb.beginText();
                            cb.setColorStroke(Color.RED);
                            if (OMRMarkingUtilityFlatfold.isFlatZone1MarkingEnabled(documentNumber,
                                                                            i))
                                OMRMarkingUtilityFlatfold.drawFlatOMRMark(cb,
                                                                  1, i,
                                                                  pageCount);
                            if (OMRMarkingUtilityFlatfold.isFlatZone2MarkingEnabled(documentNumber,
                                                                            i)) {
                                PdfContentByte cb2 =
                                    pdfStamper.getOverContent(pageCount);
                                OMRMarkingUtilityFlatfold.drawFlatOMRMark(cb2,
                                                                  2, i,
                                                                  pageCount);
                            if (OMRMarkingUtilityFlatfold.isFlatZone3MarkingEnabled(documentNumber,
                                                                            i)) {
                                PdfContentByte cb3 =
                                    pdfStamper.getOverContent(1);
                                OMRMarkingUtilityFlatfold.drawFlatOMRMark(cb3,
                                                                  3, i,
                                                                  pageCount);
                            if (OMRMarkingUtilityFlatfold.isFlatZone4MarkingEnabled(documentNumber,
                                                                            i))
                                cb.endText();
                            pdfStamper.close();
                            fileOutputStream.close();
        catch (IOException ioe) {
            ioe.printStackTrace();
        } catch (DocumentException de) {
            de.printStackTrace();
    private static void mergeFlatPdf() {
        try {
            PdfCopyFields copy =
                new PdfCopyFields(new FileOutputStream("D:\\OMR\\OMRpdf\\flat\\merge\\output1.pdf"));
            String pdfFolderPath = "D:\\OMR\\OMRpdf\\flat\\mark\\";
            File pdfFolder = new File(pdfFolderPath);
            if (pdfFolder != null && pdfFolder.isDirectory()) {
                String[] pdfFileNames = pdfFolder.list();
                if (pdfFileNames != null && pdfFileNames.length > 0) {
                    for (String pdfFileName : pdfFileNames) {
                        copy.addDocument(new PdfReader(pdfFolderPath +
                                                       pdfFileName));
            copy.close();
        } catch (IOException e) {
        } catch (DocumentException e) {
package view;
import com.lowagie.text.pdf.PdfContentByte;
import org.apache.log4j.Logger;
public class OMRMarkingUtilityFlatfold {
    private static final Logger logger =
        Logger.getLogger(OMRMarkingUtilityFlatfold.class);
    //public static final int Flat_Zone_X_Position     = 14;    // 0.1875 inches
    public static final int Flat_OMR_Mark_Thickness = 1; // 0.01   inches
    public static final int Flat_OMR_Mark_Length = 29; // 0.3    inches
    public OMRMarkingUtilityFlatfold() {
        super();
    public static boolean isFlatZone1MarkingEnabled(int documentNumber,
                                                    int pageNumber) {
        boolean flatZone1 = true;
        //        if (pageNumber % 2 != 0)
        //            trifoldZone4 = true;
        return flatZone1;
    public static boolean isFlatZone2MarkingEnabled(int documentNumber,
                                                    int pageNumber) {
        boolean flatZone2 = true;
        //        if (pageNumber % 2 != 0)
        //            trifoldZone4 = true;
        return flatZone2;
    public static boolean isFlatZone3MarkingEnabled(int documentNumber,
                                                    int pageNumber) {
        boolean flatZone3 = true;
        //        if (pageNumber % 2 != 0)
        //            trifoldZone4 = true;
        return flatZone3;
    public static boolean isFlatZone4MarkingEnabled(int documentNumber,
                                                    int pageNumber) {
        boolean flatZone4 = true;
        //        if (pageNumber % 2 != 0)
        //            trifoldZone4 = true;
        return flatZone4;
    public static int getFlat_Zone_X_Position() {
        return getFlat_Zone_X_Position();
    public static int getFlat_Zone3YPosition() {
        return getFlat_Zone3YPosition();
    public static int getFlat_Zone4YPosition() {
        return getFlat_Zone4YPosition();
    public static void drawFlatOMRMark(PdfContentByte cb, int zone,
                                       int pageNumber, int pageCount) {
        float x;
        float y;
        System.out.println(pageNumber);
        if (pageNumber == 1) {
            x = 14;
        } else {
            x = 7;
        switch (zone) {
        case 1:
            if (pageNumber == 1)
                y = 689;
            else {
                y = 688;
            break;
        case 2:
            y = 679;
            break;
        case 3:
            x = 14;
            y = 670;
            break;
        case 4:
            if (pageNumber == 1)
                y = 661;
            else {
                y = 660;
            break;
        default:
            y = 0;
            break;
        cb.moveTo(x, y);
        cb.lineTo(x + Flat_OMR_Mark_Length, y);
        cb.stroke();