IP地址工具，判断IP是否在指定范围内(支持ipv6)

常���方法，判断一个ip是否在指定的ip范围内，范围可能包括起始ip范围或者掩码形式，无其它依赖，

package com.yk.ip;import java.math.BigInteger;import java.net.InetAddress;import java.net.UnknownHostException;import java.nio.ByteBuffer;import java.util.ArrayList;import java.util.List;public class IpUtil {    /**     * 判断目标ip是否在ip范围内(起始ip范围),支持ipv6     * @param ipAddress 目标ip     * @param startIp 开始ip     * @param endIp 结束ip     * @return boolean     * @throws UnknownHostException 异常     */    public static boolean isInRange(String ipAddress,String startIp,String endIp) throws UnknownHostException {        InetAddress address = InetAddress.getByName(ipAddress);        InetAddress startAddress = InetAddress.getByName(startIp);        InetAddress endAddress = InetAddress.getByName(endIp);        BigInteger start = new BigInteger(1, startAddress.getAddress());        BigInteger end = new BigInteger(1, endAddress.getAddress());        BigInteger target = new BigInteger(1, address.getAddress());        int st = start.compareTo(target);        int te = target.compareTo(end);        return (st         if (ipWithMask.contains("/")) {            String addressPart = ipWithMask.substring(0, ipWithMask.indexOf("/"));            String networkPart = ipWithMask.substring(ipWithMask.indexOf("/") + 1);            ByteBuffer maskBuffer;            int targetSize;            InetAddress inetAddress = InetAddress.getByName(addressPart);            if (inetAddress.getAddress().length == 4) {                maskBuffer = ByteBuffer                                .allocate(4)                                .putInt(-1);                targetSize = 4;            } else {                maskBuffer = ByteBuffer.allocate(16)                        .putLong(-1L)                        .putLong(-1L);                targetSize = 16;            }            BigInteger mask = (new BigInteger(1, maskBuffer.array())).not().shiftRight(Integer.parseInt(networkPart));            ByteBuffer buffer = ByteBuffer.wrap(inetAddress.getAddress());            BigInteger ipVal = new BigInteger(1, buffer.array());            BigInteger startIp = ipVal.and(mask);            BigInteger endIp = startIp.add(mask.not());            byte[] startIpArr = toBytes(startIp.toByteArray(), targetSize);            byte[] endIpArr = toBytes(endIp.toByteArray(), targetSize);            InetAddress startAddress = InetAddress.getByAddress(startIpArr);            InetAddress endAddress = InetAddress.getByAddress(endIpArr);            return isInRange(ipAddress, startAddress.getHostAddress(), endAddress.getHostAddress());        } else {            throw new IllegalArgumentException("not an valid CIDR format!");        }    }    private static byte[] toBytes(byte[] array, int targetSize) {        int counter = 0;        List            newArr.add(0, array[array.length - 1 - counter]);            counter++;        }        int size = newArr.size();        for (int i = 0; i