有没有人有 Apache POI 将 PPTX 转换为 PNG 的例子

import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFSlide;
import org.apache.poi.xslf.usermodel.XSLFPictureData;

import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.imageio.ImageIO;

public class PPTXToPNGConverter {
    public static void main(String[] args) {
        String pptxFilePath = "path/to/presentation.pptx";
        String outputDir = "path/to/output/directory/";

        try {
            XMLSlideShow ppt = new XMLSlideShow(new FileInputStream(pptxFilePath));
            Dimension pageSize = ppt.getPageSize();

            // 获取每个幻灯片并将其转换为PNG图像
            XSLFSlide[] slides = ppt.getSlides();
            for (int i = 0; i < slides.length; i++) {
                BufferedImage image = new BufferedImage(pageSize.width, pageSize.height, BufferedImage.TYPE_INT_RGB);
                Graphics2D graphics = image.createGraphics();

                // 渲染幻灯片到图像
                slides[i].draw(graphics);

                // 将图像保存为PNG文件
                String outputFilePath = outputDir + "slide_" + (i + 1) + ".png";
                ImageIO.write(image, "png", new FileOutputStream(outputFilePath));

                graphics.dispose();
            }

            ppt.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}