Extract images from PPTX using apache poi

build.gradle

plugins {
    id 'java'
}

group 'com.vkpapps'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    implementation group: 'org.apache.poi', name: 'poi', version: '5.2.2'
    implementation group: 'org.apache.poi', name: 'poi-ooxml', version: '5.2.2'
    ...
}

test {
    useJUnitPlatform()
}

ImageExtracter.java

import java.io.*;
import java.util.List;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFPictureData;

public class ImageExtracter {
  
  /*
    This will extarct all image from PPTX and save them in images folder
  */
    public void extract(XMLSlideShow slideShow){
        List<XSLFPictureData> pictures = slideShow.getPictureData();
        File parent = new File("images");
        if (!parent.exists())parent.mkdir();
        pictures.forEach(pictureData->{
            try{
                String name = pictureData.getFileName();
                FileOutputStream outputStream = new FileOutputStream(new File(parent,name));
                outputStream.write(pictureData.getData());
                outputStream.flush();
                outputStream.close();
            }catch (Exception e){
                e.printStackTrace();
            }
        });
    }
}

Main.java

import java.io.*;
import java.util.List;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFPictureData;

public class Main {
    public static void main(String[] args) throws IOException {

        File file = new File("demo.pptx");
        XMLSlideShow ppt = new XMLSlideShow(new FileInputStream(file));
        // extracting all images
        new ImageExtracter().getImage(ppt);

    }
}