private void genernateCaptchaImage(
final HttpServletRequest request, final HttpServletResponse response) throws IOException {
response.setHeader("Cache-Control", "no-store");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
response.setContentType("image/jpeg");
ServletOutputStream out = response.getOutputStream();
try {
String captchaId = request.getSession(true).getId();
BufferedImage challenge =
(BufferedImage) captchaService.getChallengeForID(captchaId, request.getLocale());
ImageIO.write(challenge, "jpg", out);
out.flush();
} catch (CaptchaServiceException e) {
logger.error(e.getMessage(), e);
} finally {
out.close();
}
}
protected void genernateCaptchaImage(
final HttpServletRequest request, final HttpServletResponse response) {
ServletUtils.setDisableCacheHeader(response);
response.setContentType("image/png");
ServletOutputStream out = null;
try {
out = response.getOutputStream();
String captchaId = request.getSession(true).getId();
BufferedImage challenge =
(BufferedImage) captchaService.getChallengeForID(captchaId, request.getLocale());
// String writerNames[] = ImageIO.getWriterFormatNames();
ImageIO.write(challenge, "png", out);
out.flush();
} catch (IOException | CaptchaServiceException e) {
log.error("生成验证码出错", e);
} finally {
try {
out.close();
} catch (IOException e) {
log.error("生成验证码出错", e);
}
}
}