//  根據java 程式碼生成圖片儲存成檔案
private void createImage(File file, String s) throws IOException {
    Font font = new Font("微軟雅黑", Font.BOLD, 25);
    BufferedImage bi = new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
    Graphics2D g2 = (Graphics2D) bi.getGraphics();
    g2.setBackground(Color.WHITE);
    g2.clearRect(0
 
, 0, 200, 200);
    g2.setPaint(Color.BLACK);
    g2.setFont(font);
    FontRenderContext context = g2.getFontRenderContext();
    Rectangle2D bounds = font.getStringBounds(s, context);
    double x = (200 - bounds.getWidth()) / 2;
    double y = (200 - bounds.getHeight()) / 2;
    double ascent = -bounds.getY();
    double 
 
baseY = y + ascent;
    g2.drawString(s, (int) x, (int) baseY);
    ImageIO.write(bi, "jpg", file);
}