docs: public static long ipv4ToLong(String strIP) {
  		if (Validator.isIpv4(strIP)) {
  			long[] ip = new long[4];
  			// 先找到IP地址字符串中.的位置
  			int position1 = strIP.indexOf(".");
  			int position2 = strIP.indexOf(".", position1 + 1);
  			int position3 = strIP.indexOf(".", position2 + 1);
  			// 将每个.之间的字符串转换成整型
  			ip[0] = Long.parseLong(strIP.substring(0, position1));
  			ip[1] = Long.parseLong(strIP.substring(position1 + 1, position2));
  			ip[2] = Long.parseLong(strIP.substring(position2 + 1, position3));
  			ip[3] = Long.parseLong(strIP.substring(position3 + 1));
  			return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];
  		}
  		return 0;
  	}