<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="connectionFactory" />
</bean>

<bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
<property name="connectionFactory" ref="connectionFactory" />
</bean>

long start = System.currentTimeMillis();
 //需要匹配的key
 String patternKey = "pay:*";
 ScanOptions options = ScanOptions.scanOptions()
  //這里指定每次掃描key的數(shù)量(很多博客瞎說要指定Integer.MAX_VALUE，這樣的話跟 keys有什么區(qū)別？)
  .count(10000)
  .match(patternKey).build();
 RedisSerializer<String> redisSerializer = (RedisSerializer<String>) redisTemplate.getKeySerializer();
 Cursor cursor = (Cursor) redisTemplate.executeWithStickyConnection(redisConnection -> new ConvertingCursor<>(redisConnection.scan(options), redisSerializer::deserialize));
 List<String> result = new ArrayList<>();
 while(cursor.hasNext()){
  result.add(cursor.next().toString());
 }
 //切記這里一定要關閉，否則會耗盡連接數(shù)。報Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisException: Could not get a 
 cursor.close();
 log.info("scan掃描共耗時：{} ms key數(shù)量：{}",System.currentTimeMillis()-start,result.size());