判断内部IP地址和外部IP地址(private IP address or public IP Address)

/*
* Judge IP Address is private or public address
*/
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;               
}   

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;    
}   


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