在前文中,我介绍过如何给PDF文档添加文本和图片水印。本文将详细讲解如何添加、删除PPT文本和图片水印。

此次代码示例所用到的工具是Free Spire.Presentation for Java。Free Spire.Presentation for Java 是一个专业的PowerPoint API,它允许开发人员在Java应用程序中创建、读取、写入、转换和保存PowerPoint文档。同时,作为一款独立的Java组件,其运行环境无需安装Microsoft PowerPoint。

操作步骤:

通过E-iceblue中文官网下载获取Jar包,解压后将lib文件夹下的Spire.Presentation.jar手动导入Java程序。

另外,也可通过maven仓库安装产品及导入相关依赖包。

代码示例

示例1 添加图片水印

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("C:甥敳獲Test1DesktopSample.pptx");        //获取水印图片        File file =new File("C:甥敳獲Test1Desktoplogo.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("output/addImageWatermark.pptx", FileFormat.PPTX_2013);    }}

添加效果:

f772a7d9c814878cdcb11b98c0896d64.png

示例2 添加文本水印

import com.spire.presentation.*;import com.spire.presentation.drawing.FillFormatType;import java.awt.*;import java.awt.geom.Rectangle2D;public class AddTextWatermark {    public static void main(String[] args) throws Exception {        //创建presentation对象并加载示例文档        Presentation presentation = new Presentation();        presentation.loadFromFile("C:甥敳獲Test1DesktopSample.pptx");        //设置文本水印的宽和高        int width= 400;        int height= 300;        //定义一个长方形区域        Rectangle2D.Double rect = new Rectangle2D.Double((presentation.getSlideSize().getSize().getWidth() - width) / 2,                (presentation.getSlideSize().getSize().getHeight() - height) / 2, width, height);        //添加一个shape到定义区域        IAutoShape shape = presentation.getSlides().get(0).getShapes().appendShape(ShapeType.RECTANGLE, rect);        //设置shape样式        shape.getFill().setFillType(FillFormatType.NONE);        shape.getShapeStyle().getLineColor().setColor(Color.white);        shape.setRotation(-45);        shape.getLocking().setSelectionProtection(true);        shape.getLine().setFillType(FillFormatType.NONE);        //添加文本到shape        shape.getTextFrame().setText("内部使用");        PortionEx textRange = shape.getTextFrame().getTextRange();        //设置文本水印样式        textRange.getFill().setFillType(FillFormatType.SOLID);        textRange.getFill().getSolidColor().setColor(Color.pink);        textRange.setFontHeight(50);        //保存文档        presentation.saveToFile("output/addTextWatermark.pptx", FileFormat.PPTX_2010);    }}

添加效果:

2028fd08c3af8d13a9db24f7b08136c8.png

示例3 删除文本和图片水印

import com.spire.presentation.*;import com.spire.presentation.drawing.*;public class DeleteWatermark {    public static void main(String[] args) throws Exception {        //加载示例文档        Presentation presentation = new Presentation();        presentation.loadFromFile("C:甥敳獲Test1DesktopSample.pptx");        //移除文本水印        for (int i = 0; i < presentation.getSlides().getCount(); i++)        {            for (int j = 0; j < presentation.getSlides().get(i).getShapes().getCount(); j++)            {                if (presentation.getSlides().get(i).getShapes().get(j) instanceof IAutoShape)                {                    IAutoShape shape = (IAutoShape)presentation.getSlides().get(i).getShapes().get(j);                    if (shape.getTextFrame().getText().contains("内部使用"))                    {                        presentation.getSlides().get(i).getShapes().remove(shape);                    }                }            }        }        //移除图片水印        for (int i = 0; i < presentation.getSlides().getCount(); i++)        {            presentation.getSlides().get(i).getSlideBackground().getFill().setFillType(FillFormatType.NONE);        }        //保存文档        presentation.saveToFile("output/removeTextOrImageWatermark.pptx", FileFormat.PPTX_2013);    }}

(本文完)

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