CaptchaUtils.java 文件源码

/**
 * 生成验证码
 */
static void generate(HttpServletResponse response, String vCode) {
    BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
    response.setHeader("Pragma","no-cache");
    response.setHeader("Cache-Control","no-cache");
    response.setDateHeader("Expires", 0);
    response.setContentType("image/jpeg");

    ServletOutputStream sos = null;
    try {
        drawGraphic(image, vCode);
        sos = response.getOutputStream();
        ImageIO.write(image, "JPEG", sos);
        sos.flush();
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        IOUtils.closeQuietly(sos);
    }
}