BufferedImage image = new BufferedImage(WIDTH,HEIGHT,BufferedImage.TYPE_INT_RGB  );
    Graphics2D g2=(Graphics2D) image.getGraphics();

    FontRenderContext frc = g2.getFontRenderContext();

    Font f = new Font("黑体", Font.BOLD,40);
    TextLayout tl = new TextLayout(msg, f, frc);

    float sw1 = (float) tl.getBounds().getWidth();
    float sh1 = (float) tl.getBounds().getHeight();
    Shape sha1 = tl.getOutline(AffineTransform.getTranslateInstance(WIDTH/2.0-sw1/2.0,HEIGHT/2.0+sh1/2.0));

    g2.setColor(Color.red);
    g2.fill(sha1);
    g2.dispose();
  return image;