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/**
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* @param points µã¼¯ºÏ(ÓÐÐò)
*
* @return GeneralPath¶ÔÏó
*/
public static GeneralPath genGeneralPath(ArrayList<Point2D.Double> points) {
   GeneralPath path = new GeneralPath();
   if (points.size() < 3) {
    return null;
   }
   path.moveTo((float) points.get(0).getX(), (float) points.get(0).getY());
   for (Iterator<Point2D.Double> it = points.iterator(); it.hasNext();) {
    Point2D.Double point = (Point2D.Double) it.next();
    path.lineTo((float) point.getX(), (float) point.getY());
   }
   path.closePath();
   return path;
}
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