Java如何为 PPT 中的图形添加阴影效果

<repositories>
  <repository>
    <id>com.e-iceblue</id>
    <url>http://repo.e-iceblue.cn/repository/maven-public/</url>
  </repository>
</repositories>
<dependencies>
  <dependency>
    <groupId>e-iceblue</groupId>
    <artifactId>spire.presentation.free</artifactId>
    <version>2.6.1</version>
​  </dependency>
</dependencies>

import com.spire.presentation.*;
import com.spire.presentation.drawing.FillFormatType;
import com.spire.presentation.drawing.PictureFillType;
import com.spire.presentation.drawing.PresetShadow;

import java.awt.geom.Rectangle2D;
import java.awt.Color;

public class ShapeShadowEffect {

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

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

    //获取第一页幻灯片
    ISlide slide = ppt.getSlides().get(0);

    //添加一个图形
    Rectangle2D rect = new Rectangle2D.Float(120, 80, 180, 150);
    IAutoShape shape = slide.getShapes().appendShape(ShapeType.RECTANGLE,rect);

    //将图片填充到图形
    shape.getFill().setFillType(FillFormatType.PICTURE);
    shape.getFill().getPictureFill().getPicture().setUrl("C:\\Users\\Administrator\\Desktop\\cow.png");
    shape.getFill().getPictureFill().setFillType(PictureFillType.STRETCH);
    shape.getLine().setFillType(FillFormatType.NONE);

    //设置阴影效果
    PresetShadow presetShadow = new PresetShadow();
    presetShadow.setPreset(PresetShadowValue.BACK_RIGHT_PERSPECTIVE);
    presetShadow.getColorFormat().setColor(Color.lightGray);

    //将阴影效果应用到图形
    shape.getEffectDag().setPresetShadowEffect(presetShadow);

    //保存文档
    ppt.saveToFile("ShapeShadow.pptx", FileFormat.PPTX_2013);
  }
}