计算Java中IP地址是否在指定范围内

检查范围的最简单方法可能是将IP地址转换为32位整数，然后比较这些整数。

public class Example {    public static long ipToLong(InetAddress ip) {        byte[] octets = ip.getAddress();        long result = 0;        for (byte octet : octets) { result <<= 8; result |= octet & 0xff;        }        return result;    }    public static void main(String[] args) throws UnknownHostException {        long ipLo = ipToLong(InetAddress.getByName("192.200.0.0"));        long ipHi = ipToLong(InetAddress.getByName("192.255.0.0"));        long ipToTest = ipToLong(InetAddress.getByName("192.200.3.0"));        System.out.println(ipToTest >= ipLo && ipToTest <= ipHi);    }}

而不是

InetAddress.getByName()