SpringBoot+Redis 集成验证码的简单案例

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一次学习过程中简单的记录

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一、下载安装Redis

这里就不多说了，下载安装好Redis，最好是把Redis Desktop Manager一起安装了，可视化看的舒服一点。

二、代码部分

1.引入库，配置yml

引入Redis依赖，这里我的springboot版本是2.4.2

<dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-pool2</artifactId>
       <version>2.10.0</version>
</dependency>

补充一下，这个验证码的依赖

<dependency>
       <groupId>com.github.whvcse</groupId>
       <artifactId>easy-captcha</artifactId>
       <version>1.6.2</version>
</dependency>

这里就简单配置做示例，小伙伴们根据自己的业务需求来配置哈~

server:
  port: 8081
spring:
  redis:
    database: 3
    jedis:
      pool:
        max-active: 8
        max-wait: -1
    lettuce:
      pool:
        min-idle: 0
    timeout: 5000

2.编写RedisConfig

@Configuration
public class RedisConfig extends CachingConfigurerSupport {

    @Bean
    @SuppressWarnings("all")
    public Redistemplate<String, Object> redistemplate(RedisConnectionFactory redisConnectionFactory) {
        Redistemplate<String, Object> redistemplate = new Redistemplate<String, Object>();
        StringRedisSerializer keySerializer = new StringRedisSerializer();
        GenericFastJsonRedisSerializer valueSerializer = new GenericFastJsonRedisSerializer();
        redistemplate.setConnectionFactory(redisConnectionFactory);
        // 序列化 key 和 value
        redistemplate.setKeySerializer(keySerializer);
        redistemplate.setValueSerializer(valueSerializer);
        redistemplate.setHashKeySerializer(keySerializer);
        redistemplate.setHashValueSerializer(valueSerializer);
        return redistemplate;
    }
}

3.编写RedisUtils

@Component
public class RedisClient {

    @Resource
    private Redistemplate<String, Object> redistemplate;

    /*
     * @ClassName RedisClient
     * @Desc Todo   设置缓存（没有时间限制）
     * @Date 2021-07-24 16:11
     * @Version 1.0
     */
    public void set(String key, Object value) {
        redistemplate.opsForValue().set(key, value);
    }

    /*
     * @ClassName RedisClient
     * @Desc Todo   设置缓存（有时间限制，单位为 秒）
     * @Date 2021-07-24 16:11
     * @Version 1.0
     */
    public void set(String key, Object value, long timeout) {
        redistemplate.opsForValue().set(key, value, timeout, TimeUnit.SECONDS);
    }

    /*
     * @ClassName RedisClient
     * @Desc Todo   删除缓存，并返回是否删除成功
     * @Date 2021-07-24 16:11
     * @Version 1.0
     */
    public boolean delete(String key) {
        redistemplate.delete(key);
        // 如果还存在这个 key 就证明删除失败
        if (redistemplate.hasKey(key)) {
            return false;
            // 不存在就证明删除成功
        } else {
            return true;
        }
    }

    /*
     * @ClassName RedisClient
     * @Desc Todo   取出缓存
     * @Date 2021-07-24 16:12
     * @Version 1.0
     */
    public Object get(String key) {
        if (redistemplate.hasKey(key)) {
            return redistemplate.opsForValue().get(key);
        } else {
            return null;
        }
    }

    /*
     * @ClassName RedisClient
     * @Desc Todo   获取失效时间（-2：失效 / -1：没有时间限制）
     * @Date 2021-07-24 16:15
     * @Version 1.0
     */
    public long getExpire(String key) {
        // 判断是否存在
        if (redistemplate.hasKey(key)) {
            return redistemplate.getExpire(key);
        } else {
            return Long.parseLong(-2 + "");
        }
    }

4.编写Controller测试

@Controller
@ResponseBody
public class CaptchaController {

    @Resource
    private RedisClient redisClient;

    @GetMapping("/captcha")
    public void captcha(HttpServletRequest request, HttpServletResponse response) throws Exception {
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        specCaptcha.setFont(Captcha.FONT_1);
        String id = UUID.randomUUID().toString();
        response.setHeader("id", id);
        CaptchaUtil.out(specCaptcha, request, response);
        String verCode = specCaptcha.text().toLowerCase();
        redisClient.set(id, verCode);//可设置有效时间，单位为秒
    }

    @PostMapping(value = "/check")
    public boolean check(@RequestBody String info) {
        JSONObject jsonObject = JSON.parSEObject(info);
        String id = jsonObject.getString("id");
        String code = jsonObject.getString("code");
        String s = redisClient.get(id).toString();//id
        return code.equalsIgnoreCase(s);
    }
}

访问localhost:8081/captcha 别忘了启动Redis

这里的id就是存进Redis的键

我们拿到Redis的键再去请求 localhost:8081/check 验证我们的验证码是否是正确的

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总结

到这里就结束啦，一次简单验证码的集成~