前言 一次学习过程中简单的记录
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
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </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
总结
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原文链接:https://blog.csdn.net/weixin_45329211/article/details/119281731