redis 查找模糊key [scanKeys]

/**
 * 以count为步长查找符合pattern条件的keys * * @param redisTemplate 指定redis * @param pattern 匹配条件 * @param count 一次在count条记录中match符合pattern条件的记录。若count<=0,使用1000 * @return Set<String> 若limit<= 0,返回所有;否则返回查找结果
 */
public Set<String> scanKeys(String pattern, int count) {
    log.info("pattern:{}, count:{}", pattern, count);
    return redisTemplate.execute(new RedisCallback<Set<String>>() {
        @Override
        public Set<String> doInRedis(RedisConnection connection) throws DataAccessException {
            Set<String> tmpKeys = new HashSet<>();
            ScanOptions options;
            if (count <= 0) {
                options = ScanOptions.scanOptions().match(pattern).count(1000).build();
            } else {
                options = ScanOptions.scanOptions().match(pattern).count(count).build();
            }
            // 迭代一直查找，直到找到redis中所有满足条件的key为止(cursor变为0为止)
            Cursor<byte[]> cursor = connection.scan(options);
            while (cursor.hasNext()) {
                tmpKeys.add(new String(cursor.next()));
            }
            return tmpKeys;
        }
    });
}