Summary

This article introduces how to add pictures to PDF documents through java program, and how to replace and delete the existing pictures in PDF. In addition, for the operation of pictures, please refer to the settings PDF picture background , set up PDF image watermark,Read pictures in PDF , will PDF save as picture And so on.

Tools: free flame.pdf for Java (free version)

Jar access and import: Download official website And unzip the jar file under the lib folder into the java program, or through the maven warehouse download and import.

jar import effect:

Java code example

[example 1] add picture to PDF

import com.spire.pdf.*;
import com.spire.pdf.graphics.*;

public class AddImage {
    public static void main(String[] args) {
        //create documents
        PdfDocument pdf = new PdfDocument();

        //Add a page
        PdfPageBase page = pdf.getPages().add();

        //Load the picture and get the height and width of the picture
        PdfImage image = PdfImage.fromFile("fj.png");
        int width = image.getWidth()/2;
        int height = image.getHeight()/2;

        //Draw picture to PDF
        page.getCanvas().drawImage(image,50,50,width, height);

        //Save document
        pdf.saveToFile("AddImage.pdf");
        pdf.dispose();
    }
}

Picture adding effect:

[example 2] replace the picture in PDF

import com.spire.pdf.*;
import com.spire.pdf.graphics.PdfImage;

public class ReplaceImage {
    public static void main(String[] args) {
        //Load PDF File
        PdfDocument pdf = new PdfDocument();
        pdf.loadFromFile("AddImage.pdf");

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

        //Load a picture
        PdfImage image = PdfImage.fromFile("lh.png");

        //Replace the first picture on the first page with the loaded picture
        page.replaceImage(0, image);

        //Save document
        pdf.saveToFile("ReplaceImage.pdf");
        pdf.dispose();
    }
}

Picture replacement effect:

[example 3] delete the picture in PDF

import com.spire.pdf.*;

public class DeleteImage {
    public static void main(String[] args) {
        //Establish PdfDocument object
        PdfDocument pdf = new PdfDocument();

        //Load PDF File
        pdf.loadFromFile("AddImage.pdf");

        //Get the specified page
        PdfPageBase page = pdf.getPages().get(0);

        //Delete the specified picture on the page
        page.deleteImage(0);

        //Save document
        pdf.saveToFile("DeleteSpecificImage.pdf", FileFormat.PDF);
        pdf.dispose();
    }
}

Picture deletion effect:

(end of this paper)