通过项目的redis工具类设置了一个 key value 值，通过key取不到value？

多半是因为没有对 redisTemplate 进行序列化处理，java 代码会将 key 转化成对应的十六进制的数值进行操作

@Bean
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {
    RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
    redisTemplate.setConnectionFactory(lettuceConnectionFactory);
    redisTemplate.setKeySerializer(new StringRedisSerializer());
    redisTemplate.setValueSerializer(getJackson2JsonRedisSerializer());
    redisTemplate.setHashKeySerializer(new StringRedisSerializer());
    redisTemplate.setHashValueSerializer(getJackson2JsonRedisSerializer());
    redisTemplate.afterPropertiesSet();
    return redisTemplate;
}

private Jackson2JsonRedisSerializer<Object> getJackson2JsonRedisSerializer() {
    Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
    ObjectMapper om = new ObjectMapper();
    om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
    jackson2JsonRedisSerializer.setObjectMapper(om);
    return jackson2JsonRedisSerializer;
}