使用以下代码:
public static void main(String[] args) throws IOException {
FileInputStream is = new FileInputStream("C:/Users/hp/Downloads/sampPPT.ppt");
HSLFSlideShow ppt = new HSLFSlideShow(is);
is.close();
Dimension pgsize = ppt.getPageSize();
int idx = 1;
for (HSLFSlide slide : ppt.getSlides()) {
BufferedImage img = new BufferedImage(pgsize.width, pgsize.height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = img.createGraphics();
// clear the drawing area
graphics.setPaint(Color.white);
graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
// render
slide.draw(graphics);
// save the output
FileOutputStream out = new FileOutputStream("C:/Users/hp/Downloads/slide-" + idx + ".png");
javax.imageio.ImageIO.write(img, "png", out);
out.close();
idx++;
}
}
这会引发以下异常:
Exception in thread "main" java.lang.IllegalAccessError: class org.apache.poi.hslf.usermodel.HSLFSlideShowImpl tried to access private field org.apache.poi.POIDocument.directory (org.apache.poi.hslf.usermodel.HSLFSlideShowImpl and org.apache.poi.POIDocument are in unnamed module of loader 'app')
at org.apache.poi.hslf.usermodel.HSLFSlideShowImpl.readCurrentUserStream(HSLFSlideShowImpl.java:340)
at org.apache.poi.hslf.usermodel.HSLFSlideShowImpl.<init>(HSLFSlideShowImpl.java:154)
at org.apache.poi.hslf.usermodel.HSLFSlideShowImpl.<init>(HSLFSlideShowImpl.java:127)
at org.apache.poi.hslf.usermodel.HSLFSlideShowImpl.<init>(HSLFSlideShowImpl.java:116)
at org.apache.poi.hslf.usermodel.HSLFSlideShow.<init>(HSLFSlideShow.java:138)
at PPTConv.PPTConv.main(PPTConv.java:27)