redisTemplate使用scan模糊匹配key

long start = System.currentTimeMillis();
 //需要匹配的key
 String patternKey = "pay:*";
 ScanOptions options = ScanOptions.scanOptions()
  .count(10000) //这里指定每次扫描key的数量
  .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());
 }
 //切记这里一定要关闭，否则会耗尽连接数。
 cursor.close();
 log.info("scan扫描共耗时：{} ms key数量：{}",System.currentTimeMillis()-start,result.size());

 转自:https://blog.csdn.net/qq_40847065/article/details/113696400