def exchange_maskint(mask_int): bin_arr = [' for i in range(32)] for i in range(mask_int): bin_arr[i] = ' tmpmask = [''.join(bin_arr[i * 8:i * 8 + 8]) for i in range(4)] tmpmask = [str(int(tmpstr, 2)) for tmpstr in tmpmask] return '.'.join(tmpmask) i
在应用程序开发中,涉及到IP地址的存储,大部分开发人员都将其存为String(或文本类型).能否将固定格式为m.n.x.y的IP地址转换成 Long型的数字呢?答案是肯定的.在数据库层面,可以直接将结果设置成表的主键,避免IP地址的重复,因为是主键,也就是表的索引了,数据库查找时会更 快. 对于格式为m.n.x.y的IP地址,转换成Long型数字的算法如下: view plain copy Long = * 256 * 256 * m + y 使用Java语言,则这样实现: view p
下面代码是关于Java将ip字符串转换成整数的代码,希望对各位有较大用途. public class IpUtil { public static int Ip2Int(String strIp){ String[] ss = strIp.split("\."); if(ss.length != 4){ return 0; } byte[] bytes = new byte[ss.length]; for(int i = 0; i < bytes.length; i++){ by
<span style="font-size:18px;">public class IpUtil { /** * ip地址转换成16进制long * @param ipString * @return */ public static Long ipToLong(String ipString) { Long[] ip = new Long[4]; int pos1= ipString.indexOf("."); int pos2= ipString.
问题描述: Given a string containing only digits, restore it by returning all possible valid IP address combinations. For example:Given "25525511135", return ["255.255.11.135", "255.255.111.35"]. (Order does not matter) 算法分析: 首先我们
python 2.7 #!/usr/bin/env python # Python Network Programming Cookbook -- Chapter - # This program requires Python 2.7 or any later version import socket from binascii import hexlify def convert_ip4_address(): for ip_addr in ['127.0.0.1', '192.168.0.
/*===================================== IP Address Time Limit:1000MS Memory Limit:30000KB Total Submit:3394 Accepted:1530 Special Judge Description Suppose you are reading byte streams from any device, representing IP addresses. Your task is to conve