微服务开发图形验证码加入缓存

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工具类在顶部获取

public class NotifyController {
    @Autowired
    private Producer captchaProducer;
    @Autowired
    private StringRedisTemplate redisTemplate;

    /**
     * 图形验证码有效期10分钟
     */
    private static final long CAPTCHA_CODE_EXPIRED = 60 * 1000 * 10;
    /**
     * 获取图形验证码
     *
     * @param request
     * @param response
     */
    @ApiOperation("获取图形验证码")
    @GetMapping("captcha")
    public void getCaptcha(HttpServletRequest request, HttpServletResponse response) {

        String captchaText = captchaProducer.createText();
        log.info("图形验证码:{}", captchaText);
        //存储
        redisTemplate.opsForValue().set(getCaptchaKey(request),captchaText,CAPTCHA_CODE_EXPIRED,TimeUnit.MILLISECONDS);
        //存储
        BufferedImage bufferedImage = captchaProducer.createImage(captchaText);
        ServletOutputStream outputStream = null;
        try {
            outputStream = response.getOutputStream();
            ImageIO.write(bufferedImage, "jpg", outputStream);
            outputStream.flush();
            outputStream.close();
        } catch (IOException e) {
            log.error("获取图形验证码异常:{}", e);
        }

    }

    /**
     * 获取缓存的key
     * @param request
     * @return
     */
    private String getCaptchaKey(HttpServletRequest request){

        String ip = CommonUtil.getIpAddr(request);
        String userAgent = request.getHeader("User-Agent");

        String key = "user-service:captcha:"+CommonUtil.MD5(ip+userAgent);

        log.info("ip={}",ip);
        log.info("userAgent={}",userAgent);
        log.info("key={}",key);

        return key;

    }


}

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关键代码

 /**
     * 获取缓存的key
     * @param request
     * @return
     */
    private String getCaptchaKey(HttpServletRequest request){

        String ip = CommonUtil.getIpAddr(request);
        String userAgent = request.getHeader("User-Agent");

        String key = "user-service:captcha:"+CommonUtil.MD5(ip+userAgent);

        log.info("ip={}",ip);
        log.info("userAgent={}",userAgent);
        log.info("key={}",key);

        return key;

    }

  //存储
        redisTemplate.opsForValue().set(getCaptchaKey(request),captchaText,CAPTCHA_CODE_EXPIRED,TimeUnit.MILLISECONDS);

    /**
     * 图形验证码有效期10分钟
     */
    private static final long CAPTCHA_CODE_EXPIRED = 60 * 1000 * 10;