ipv4转整数

IP与整数互转，C语言实现

#define PRINT_IP_FORMAT  "%u.%u.%u.%u"
#define  PRINT_HIP(x)\
   ((x >> 24) & 0xFF),\
   ((x >> 16) & 0xFF),\
   ((x >>  8) & 0xFF),\
   ((x >>  0) & 0xFF)

/**
 * 整数IP装字符串
 * @int_ip 输入转换的整数
 * @ip_str输出字符串
 */
void GMIntIPToString(int int_ip, char *ip_str) {
    sprintf(ip_str, PRINT_IP_FORMAT, PRINT_HIP(int_ip));
}

/**
 * IP字符串转整数
 * @ip_str 需要装换的IP
 * @return 结果
 */
int GMStringToIntIP(const char* ip_str) {
    int a = 0;
    int b = 0;
    int c = 0;
    int d = 0;
    sscanf(ip_str, "%d.%d.%d.%d", &a, &b, &c, &d);

    int ip = 0;
    char *p = (char*) &ip;
    *p = a;
    p++;
    *p = b;
    p++;
    *p = c;
    p++;
    *p = d;
    return t_htonl(ip);
}

IP 与整数互转，JAVA语言实现

/**
     * 整数IP装字符串
     * 
     * @int_ip 输入转换的整数
     * @ip_str输出字符串
     */
    public static long GMStringToIntIP(String ip_str) {
        int indx = 0;
        int oindx = 0;
        StringBuffer sb = new StringBuffer();
        while (ip_str.indexOf(".", indx) > 0) {
            oindx = indx - 1;
            indx = ip_str.indexOf(".", indx);
            sb.append(GMTools.uint8ToByteString(Integer.parseInt(ip_str.substring(oindx + 1, indx))));
            indx++;
        }
        sb.append(GMTools.uint8ToByteString(Integer.parseInt(ip_str.substring(indx))));
        return t_ntohl(Long.parseLong(sb.toString(), 2));
    }

    /**
     * 整数IP装字符串
     * 
     * @int_ip 输入转换的整数
     * @ip_str输出字符串
     */
    public static String GMIntIPToString(long int_ip) {
        int[] ret = new int[4];
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < 4; i++) {
            ret[i] = (int) ((int_ip >> (8 * (3 - i))) & 0xFF);
            sb.append(ret[i]);
            if (i < 3) {
                sb.append('.');
            }
        }

        return sb.toString();
    }