本文将详细介绍如何使用Spire.Presentation for Java给PPT文档添加图片水印。

示例文档:

import com.spire.presentation.*;
import com.spire.presentation.drawing.*;
import javax.imageio.ImageIO;
import java.io.File;


public class addImageWatermark {

    public static void main(String[] args) throws Exception {
        //加载示例文档
        Presentation presentation = new Presentation();
        presentation.loadFromFile("Sample.pptx");

        //获取水印图片
        File file =new File("logo.png");
        IImageData image = presentation.getImages().append(ImageIO.read(file));

        //获取幻灯片背景属性，设置图片填充      
        presentation.getSlides().get(0).getSlideBackground().setType(BackgroundType.CUSTOM);
        presentation.getSlides().get(0).getSlideBackground().getFill().setFillType(FillFormatType.PICTURE);
        presentation.getSlides().get(0).getSlideBackground().getFill().getPictureFill().setFillType(PictureFillType.STRETCH);
        presentation.getSlides().get(0).getSlideBackground().getFill().getPictureFill().getPicture().setEmbedImage(image);

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

效果图: