Java如何将PPT的幻灯片转换为图片？

在Java编程中，如何将PPT的幻灯片转换为图片？

注意：需要访问网址：http://poi.apache.org/download.html ， 下载一个Apache POI软件包。这里下载最新版本：poi-bin-3.17-20170915.tar.gz解压并全部导入 。

需要导入全部包，如下图所示 -

以下是使用Java将PPT的幻灯片转换为图片的程序。

package com.zaixian;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;

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

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

        // creating an empty presentation
        File file = new File("addingimage.pptx");
        XMLSlideShow ppt = new XMLSlideShow(new FileInputStream(file));

        // getting the dimensions and size of the slide
        Dimension pgsize = ppt.getPageSize();
        List<XSLFSlide> slide = ppt.getSlides();
        BufferedImage img = null;

        for (int i = 0; i < slide.size(); i++) {
            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.get(i).draw(graphics);
        }
        // creating an image file as output
        FileOutputStream out = new FileOutputStream("ppt_image.png");

        javax.imageio.ImageIO.write(img, "png", out);
        ppt.write(out);
        System.out.println("Image successfully created");
        out.close();
    }
}

执行上面示例代码，得到以下结果 -

Image successfully created

这就创建一个PPT文件:addingimage.pptx了，如下所示 -