redis 正则匹配符合条件的key 进行删除

//根据名字的key，如果key数量超过100，就进行一次删除

public int clearRedis(@PathVariable("prefix") String prefix) throws IOException {
        ScanOptions options = ScanOptions.scanOptions().match(prefix + "*").count(1000).build();
        Cursor cursor = redisTemplate.getConnectionFactory().getConnection().scan(options);
        int index = 0;
        try {
            List<String> list = new ArrayList<>();
            while (cursor.hasNext()) {
                index++;
                try {
                    String key = new String((byte[]) cursor.next());
                    list.add(key);
                    if (list.size() >= 100) {
                        redisTemplate.unlink(list);
                        log.info("删除{},{},{},{}", index, cursor.getPosition(), list.get(0), key);
                        list.clear();
                    }

                } catch (Exception e) {
                    log.error("error,{},{}", index, cursor.getPosition());
                }
            }
            if (list.size() > 0) {
                redisTemplate.unlink(list);
                log.info("删除{},{},{},{}", index, cursor.getPosition(), list.get(0), list.get(list.size() - 1));
                list.clear();
            }
        } finally {
            cursor.close();
        }
        return index;
    }