本文介绍如何使用Spire.Presentation for Java获取指定幻灯片中的图片形状，并用新图片进行填充。

import com.spire.presentation.*;
import com.spire.presentation.drawing.IImageData;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;

public class ReplaceImage {

    public static void main(String[] args) throws Exception {

        //创建Presentation对象
        Presentation presentation= new Presentation();

        //加载PowerPoint示例文档
        presentation.loadFromFile("C:\\Users\\Administrator\\Desktop\\input.pptx");

        //添加图片到图片集合
        String imagePath = "C:\\Users\\Administrator\\Desktop\\Microsoft-PowerPoint-logo.jpg";
        BufferedImage bufferedImage = ImageIO.read(new FileInputStream(imagePath));
        IImageData image = presentation.getImages().append(bufferedImage);

        //获取第一张幻灯片上形状集合
        ShapeCollection shapes = presentation.getSlides().get(0).getShapes();

        //遍历所有形状
        for (int i = 0; i < shapes.getCount(); i++) {

            //判断形状是否是图片
            if (shapes.get(i) instanceof SlidePicture) {

                //将图片形状用新图片填充
               ((SlidePicture) shapes.get(i)).getPictureFill().getPicture().setEmbedImage(image);
            }
        }

        //保存文档
        presentation.saveToFile("output/ReplaceImage.pptx", FileFormat.PPTX_2013);
    }
}