Java Hutool和Kaptcha返回验证码

一、使用Hutool验证码

public Result<Object> getVerify() throws Exception {
        //生成验证码图片
        LineCaptcha captcha = CaptchaUtil.createLineCaptcha(Constants.WIDTH, Constants.HEIGHT, Constants.CODE_COUNT, Constants.LINE_COUNT);
        captcha.setFont(new Font("Consolas", Font.BOLD, (int) ((double) Constants.HEIGHT * 0.75D)));
        captcha.setGenerator(new RandomGenerator(Constants.VERIFY_STR, Constants.CODE_COUNT));
        captcha.createCode();
        //验证码字符
        String verifyCode = captcha.getCode();
        //拼接固定的接收格式
        String param = "data:image/png;base64," + captcha.getImageBase64();
        return Result.success(param);
    }

二、Kaptcha

public Result kaptcha() throws Exception {
        String key = UUID.randomUUID().toString();
        String code = producer.createText();
        BufferedImage image = producer.createImage(code);
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ImageIO.write(image, "jpg", outputStream);
        String base64Img = "data:image/png;base64,"
                .concat(Base64Encoder.encode(outputStream.toByteArray()));
        return Result.success(MapUtil.builder()
                .put("key", key)
                .put("base64Img", base64Img)
                .build());
    }