java如何获得redis所有的key-value

@Bean public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory) { RedisTemplate redisTemplate = new RedisTemplate<>(); redisTemplate.setConnectionFactory(redisConnectionFactory); StringRedisSerializer serializer = new StringRedisSerializer(); redisTemplate.setKeySerializer(serializer); redisTemplate.setValueSerializer(serializer); return redisTemplate; }