百度免费网站建设,手机网页如何制作,在线药店网站建设,长春网站建设工作常用方法#xff0c;判断一个ip是否在指定的ip范围内#xff0c;范围可能包括起始ip范围或者掩码形式#xff0c;无其它依赖#xff0c;
package com.yk.ip;import java.math.BigInteger;
import java.net.InetAddress;
import java.net.UnknownHostException;
import jav…常用方法判断一个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 0) (te 0);}/*** 判断目标ip是否在ip范围内(掩码),支持ipv6* param ipAddress 目标ip* param ipWithMask 带掩码ip* return boolean* throws UnknownHostException 异常*/public static boolean isInRange(String ipAddress,String ipWithMask) throws UnknownHostException {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;ListByte newArr new ArrayListByte();while (counter targetSize (array.length - 1 - counter 0)) {newArr.add(0, array[array.length - 1 - counter]);counter;}int size newArr.size();for (int i 0; i (targetSize - size); i) {newArr.add(0, (byte) 0);}byte[] ret new byte[newArr.size()];for (int i 0; i newArr.size(); i) {ret[i] newArr.get(i);}return ret;}
}
