(转)判断一个IP地址是否为内网IP（备忘）

来源：互联网发布：外汇实盘交易软件编辑：程序博客网时间：2024/04/29 11:04

java 代码/*判断是否是内网IP*/public static boolean isInnerIP(String ipAddress){
        boolean isInnerIp = false;
        long ipNum = getIpNum(ipAddress);
        /**
        私有IP：A类 10.0.0.0-10.255.255.255
               B类 172.16.0.0-172.31.255.255
               C类 192.168.0.0-192.168.255.255
        当然，还有127这个网段是环回地址
        **/
        long aBegin = getIpNum("10.0.0.0");
        long aEnd = getIpNum("10.255.255.255");
        long bBegin = getIpNum("172.16.0.0");
        long bEnd = getIpNum("172.31.255.255");
        long cBegin = getIpNum("192.168.0.0");
        long cEnd = getIpNum("192.168.255.255");
        isInnerIp = isInner(ipNum,aBegin,aEnd) || isInner(ipNum,bBegin,bEnd) || isInner(ipNum,cBegin,cEnd) || ipAddress.equals("127.0.0.1");
        return isInnerIp;
}

java 代码/*获取IP数*/
private static long getIpNum(String ipAddress) {
    String [] ip = ipAddress.split("//.");
    long a = Integer.parseInt(ip[0]);
    long b = Integer.parseInt(ip[1]);
    long c = Integer.parseInt(ip[2]);
    long d = Integer.parseInt(ip[3]);

    long ipNum = a * 256 * 256 * 256 + b * 256 * 256 + c * 256 + d;
    return ipNum;
}

java 代码
private static boolean isInner(long userIp,long begin,long end){
     return (userIp>=begin) && (userIp<=end);
}