Spire.Presentation for Java 8.6.2 はポリゴンの頂点数と位置の取得をサポートしています

Presentation ppt = new Presentation();
ppt.loadFromFile(inputFile);
IAutoShape shape = (IAutoShape)ppt.getSlides().get(0).getShapes().get(0);
ArrayList<Point2D> points = shape.getPoints();
String text1 = "point count：" + " " + points.size() + "\r\n";
FileWriter writer1 = new FileWriter(outputFile, true);
writer1.append(text1);
writer1.close();
for (int i = 0; i < points.size(); i++)
{
    String text2 = "point" + i + " " + points.get(i) + "\r\n";
    FileWriter writer2 = new FileWriter(outputFile, true);
    writer2.append(text2);
    writer2.close();
}