import org.apache.commons.io.FileUtils;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.tools.imageio.ImageIOUtil;

import javax.swing.*;
import javax.swing.filechooser.FileFilter;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class Main {
	public static void main(String[] args) throws IOException {
		String scanPath = System.getProperty("user.home") + File.separatorChar + "Desktop" + File.separatorChar + "scan";
		File jpgDirectory = new File(scanPath + File.separatorChar + "jpg");
		File scanDirectory = new File(scanPath);

		if (!scanDirectory.exists()) {
			scanDirectory.mkdir();
		}

		if (!jpgDirectory.exists()) {
			jpgDirectory.mkdir();
		} else {
			FileUtils.cleanDirectory(jpgDirectory);
		}

		final JFileChooser fc = new JFileChooser();

		fc.setMultiSelectionEnabled(false);

		fc.setFileFilter(new FileFilter() {
			@Override
			public boolean accept(File f) {
				return f.getName().endsWith(".pdf");
			}

			@Override
			public String getDescription() {
				return "PDF files (*.PDF)";
			}
		});

		fc.showOpenDialog(null);

		File pdf = fc.getSelectedFile();

		if (pdf == null) {
			return;
		}

		PDDocument document = PDDocument.load(pdf);
		PDFRenderer pdfRenderer = new PDFRenderer(document);
		for (int page = 0; page < document.getNumberOfPages(); ++page) {
			BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 200, ImageType.RGB);

			ImageIOUtil.writeImage(bim, jpgDirectory.getPath() + File.separatorChar + "prova." + String.format("%04d", page + 1) + ".jpg", 200);
		}

		document.close();
		
	}
}