Cannot resolve method 'addPicture(BufferedImage, PictureType)'

很抱歉给您带来了困扰。由于 Apache POI 的版本更新，现在使用 `addPicture` 方法来添加图片已经发生了变化。下面是更新后的代码示例：

import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFSlide;
import org.apache.poi.sl.usermodel.PictureData;
import org.apache.poi.sl.usermodel.PictureData.PictureType;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.rendering.ImageType;

import java.awt.*;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

public class PDFToPPTConverter {
    public static void main(String[] args) {
        String pdfFilePath = "path/to/input.pdf";
        String pptFilePath = "path/to/output.pptx";

        try {
            PDDocument document = PDDocument.load(new File(pdfFilePath));
            PDFRenderer pdfRenderer = new PDFRenderer(document);
            XMLSlideShow ppt = new XMLSlideShow();

            for (int pageIndex = 0; pageIndex < document.getNumberOfPages(); pageIndex++) {
                BufferedImage image = pdfRenderer.renderImageWithDPI(pageIndex, 300, ImageType.RGB);
                XSLFSlide slide = ppt.createSlide();
                Dimension pageSize = ppt.getPageSize();

                // 缩放图像以适应幻灯片
                double slideWidth = pageSize.getWidth();
                double slideHeight = pageSize.getHeight();
                double imageWidth = image.getWidth();
                double imageHeight = image.getHeight();
                double scaleX = slideWidth / imageWidth;
                double scaleY = slideHeight / imageHeight;
                double scale = Math.min(scaleX, scaleY);
                double scaledWidth = scale * imageWidth;
                double scaledHeight = scale * imageHeight;

                // 计算图像在幻灯片上的位置
                double x = (slideWidth - scaledWidth) / 2;
                double y = (slideHeight - scaledHeight) / 2;

                // 在幻灯片上绘制图像
                XSLFPictureData pictureData = ppt.addPicture(image, PictureType.PNG);
                XSLFPictureShape pictureShape = slide.createPicture(pictureData);
                pictureShape.setAnchor(new Rectangle2D.Double(x, y, scaledWidth, scaledHeight));

                // 调整幻灯片的背景填充
                slide.getBackground().setFillColor(Color.white);

                // 添加幻灯片的标题
                String title = "Slide " + (pageIndex + 1);
                Rectangle2D titleBounds = new Rectangle2D.Double(x, y, scaledWidth, scaledHeight * 0.1);
                slide.addTitle().setAnchor(titleBounds);
                slide.addTitle().setText(title);
            }

            FileOutputStream out = new FileOutputStream(pptFilePath);
            ppt.write(out);
            out.close();
            document.close();

            System.out.println("PDF转换为PPT成功！");
        } catch (IOException e) {
            System.out.println("PDF转换为PPT时发生错误：" + e.getMessage());
        }
    }
}

这段代码做了以下更新：

1. 使用 `addPicture` 方法来添加图片，并使用 `PictureType.PNG` 指定图片类型。
2. 创建 `XSLFPictureShape` 对象来绘制图片，并使用 `setAnchor` 方法设置图片的位置和大小。

请确保您的项目依赖项中包含了最新版本的 Apache POI 库。如果仍然遇到问题，请检查您的项目设置和依赖项。希望这次能帮助到您！如有其他问题，请随时提问。