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Replace Text in PDF in Java

 This article introduces two ways to replace text in PDF in Java:

  • Replace only the first occurrence of the specified text
  • Replace all occurrences of a specified text

Before using the following code, you need to download Free Spire.PDF for Java API, unzip the package and then add Spire.Pdf.jar in the lib folder into your project. If you’re creating maven projects, you can install Free Spire.PDF for Java API from maven repository.

 

Replace only the first occurrence of the specified text

import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import com.spire.pdf.general.find.PdfTextFind;
import com.spire.pdf.general.find.PdfTextFindCollection;
import com.spire.pdf.graphics.PdfBrush;
import com.spire.pdf.graphics.PdfBrushes;
import com.spire.pdf.graphics.PdfRGBColor;
import com.spire.pdf.graphics.PdfSolidBrush;
import com.spire.pdf.graphics.PdfTrueTypeFont;
import java.awt.*;
import java.awt.geom.Rectangle2D;
 public class ReplaceText {

    public static void main(String[] args) throws Exception {
        //Create a PdfDocument instance
        PdfDocument doc = new PdfDocument();
        //Load a pdf file
        doc.loadFromFile("Java.pdf");
        //Get the first page of the pdf file
        PdfPageBase page = doc.getPages().get(0);
        //Search text "Java"
        PdfTextFindCollection collection = page.findText("Java",false);
        String newText = "C#";
        //Get the first occurrence of the searched text
        PdfTextFind find = collection.getFinds()[0];
        //Create a PdfBrush instance
        PdfBrush brush = new PdfSolidBrush(new PdfRGBColor(Color.blue));

        //Define a font
        PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", Font.BOLD,15));
        //Replace the first occurrence of the searched text with new text
        Rectangle2D rec = find.getBounds();
        page.getCanvas().drawRectangle(PdfBrushes.getWhite(), rec);
        page.getCanvas().drawString(newText, font, brush, rec);
        find.applyRecoverString(newText);

        //Save the document
        doc.saveToFile("replaceFirstSearchedText.pdf");
    }
}

Output:


Replace all occurrences of a specified text
import com.spire.pdf.FileFormat;
import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import com.spire.pdf.general.find.PdfTextFind;
import com.spire.pdf.general.find.PdfTextFindCollection;
import com.spire.pdf.graphics.PdfBrush;
import com.spire.pdf.graphics.PdfBrushes;
import com.spire.pdf.graphics.PdfRGBColor;
import com.spire.pdf.graphics.PdfSolidBrush;
import com.spire.pdf.graphics.PdfTrueTypeFont;

import java.awt.*;
import java.awt.geom.Rectangle2D;

public class ReplaceText {
    public static void main(String[] args) throws Exception {
        //Create a PdfDocument instance
        PdfDocument doc = new PdfDocument();
        //Load a pdf file
        doc.loadFromFile("Java.pdf");

        //Get the first page of pdf file
        PdfPageBase page = doc.getPages().get(0);

        //Search text "Java"
        PdfTextFindCollection collection = page.findText("Java",false);

        String newText = "C#";

        //Create a PdfBrush instance
        PdfBrush brush = new PdfSolidBrush(new PdfRGBColor(Color.blue));

        //Define a font
        PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial",  Font.ITALIC, 11));

        //Replace all the occurrences of the searched text in the first page with new text
        for (Object findObj : collection.getFinds()) {
            PdfTextFind find=(PdfTextFind)findObj;
            Rectangle2D.Float rec = (Rectangle2D.Float)find.getBounds();
            page.getCanvas().drawRectangle(PdfBrushes.getWhite(), rec);
            page.getCanvas().drawString(newText, font, brush, rec);
            find.applyRecoverString(newText);
        }
       
        //Save the document
        doc.saveToFile("replaceAllSearchedText.pdf", FileFormat.PDF);
    }
}

Output:


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