java如何获得redis所有的key-value

@Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);

        StringRedisSerializer serializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(serializer);
        redisTemplate.setValueSerializer(serializer);
        return redisTemplate;
    }