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Springboot +redis+谷歌开源Kaptcha实现图片验证码功能

发布时间:2022-1-29 20:23 作者:look-word

背景

Kaptcha 框架介绍

⾕歌开源的⼀个可高度配置的实⽤验证码生成⼯具

添加依赖

<!--kaptcha依赖包-->
<dependency>
 <groupId>com.baomidou</groupId>
 <artifactId>kaptcha-spring-bootstarter</artifactId>
 <version>1.0.0</version>
 </dependency>

配置类

/**
 * 图像验证码的配置文件
 * @author : look-word
 * @date : 2022-01-28 17:10
 **/
@Configuration
public class CaptchaConfig {
    /**
     * 验证码配置
     * Kaptcha配置类名
     *
     * @return
     */
    @Bean
    @Qualifier("captchaProducer")
    public DefaultKaptcha kaptcha() {
        DefaultKaptcha kaptcha = new DefaultKaptcha();
        Properties properties = new Properties();
        //验证码个数
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "4");
        //字体间隔
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_SPACE,"8");
        //⼲扰线颜⾊

        //⼲扰实现类
        properties.setProperty(Constants.KAPTCHA_NOISE_IMPL, "com.google.code.kaptcha.impl.NoNoise");
        //图⽚样式
        properties.setProperty(Constants.KAPTCHA_OBSCURIFICATOR_IMPL,
                "com.google.code.kaptcha.impl.WaterRipple");
        //⽂字来源
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_STRING, "0123456789");
        Config config = new Config(properties);
        kaptcha.setConfig(config);
        return kaptcha;
    }
}

实战

我的配置类

获取访问ip和生成MD5的工具类

public class CommonUtil {
    /**
     * 获取ip
     * @param request
     * @return
     */
    public static String
    getIpAddr(HttpServletRequest request) {
        String ipAddress = null;
        try {
            ipAddress = request.getHeader("xforwarded-for");
            if (ipAddress == null ||
                    ipAddress.length() == 0 ||
                    "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress =
                        request.getHeader("Proxy-Client-IP");
            }
                        request.getHeader("WL-Proxy-Client-IP");
                        request.getRemoteAddr();
                if
                (ipAddress.equals("127.0.0.1")) {
                    // 根据⽹卡取本机配置的IP
                    InetAddress inet = null;
                    try {
                        inet =
                                InetAddress.getLocalHost();
                    } catch (UnknownHostException e) {
                        e.printStackTrace();
                    }
                    ipAddress =
                            inet.getHostAddress();
                }
            // 对于通过多个代理的情况,第⼀个IP为客户端真实IP,多个IP按照','分割
            if (ipAddress != null &&
                    ipAddress.length() > 15) {
                // "***.***.***.***".length()
                // = 15
                if (ipAddress.indexOf(",") > 0)
                {
                            ipAddress.substring(0, ipAddress.indexOf(","));
        } catch (Exception e) {
            ipAddress="";
        }
        return ipAddress;
    }
    public static String MD5(String data) {
            java.security.MessageDigest md =
                    MessageDigest.getInstance("MD5");
            byte[] array =
                    md.digest(data.getBytes("UTF-8"));
            StringBuilder sb = new
                    StringBuilder();
            for (byte item : array) {

                sb.append(Integer.toHexString((item & 0xFF) |
                        0x100).substring(1, 3));
            return sb.toString().toUpperCase();
        } catch (Exception exception) {
        return null;
}

接口开发

@RestController
@RequestMapping("/api/v1/captcha")
public class CaptchaController {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    
    private Producer producer;
    @RequestMapping("get_captcha")
    public void getCaptcha(HttpServletRequest request, HttpServletResponse response){
        String captchaText = producer.createText();
        String key = getCaptchaKey(request);
        // 十分钟过期
        stringRedisTemplate.opsForValue().set(key,captchaText,10, TimeUnit.MINUTES);
        BufferedImage image = producer.createImage(captchaText);
        ServletOutputStream outputStream=null;
        try {
            outputStream= response.getOutputStream();
            ImageIO.write(image,"jpg",outputStream);
            outputStream.flush();
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    /**
     * 生成redis验证码模块的key
     * @param request
     * @return
     */
    private String getCaptchaKey(HttpServletRequest request){
        String ipAddr = CommonUtil.getIpAddr(request);
        // 请求头
        String userAgent=request.getHeader("user-Agent");
        String key="user_service:captcha:"+CommonUtil.MD5(ipAddr+userAgent);
        return key;
}

配置文件

server:
  port: 8080
spring:
  redis:
    host: redis锁在的ip
    password: redis的密码
    port: 端口号
    lettuce:
      pool:
        # 连接池最⼤连接数(使⽤负值表示没有限制)
        max-idle: 10
        # 连接池中的最⼤空闲连接
        max-active: 10
        # 连接池中的最⼩空闲连接
        min-idle: 0
        # 连接池最⼤阻塞等待时间(使⽤负值表示没有限制)
        max-wait: -1ms

结果

到此这篇关于Springboot +redis+⾕歌开源Kaptcha实现图片验证码功能的文章就介绍到这了,更多相关Springboot 图片验证码内容请搜索猪先飞以前的文章或继续浏览下面的相关文章希望大家以后多多支持猪先飞!

原文出处:https://www.cnblogs.com/look-word/p/15854374.html

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