IP段(CIDR格式)构建匹配库，传入IP查询是否命中

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代码中有一些没用的自行去掉，我使用的CIDR格式，也可以通过IP的范围改造一下代码使用。

导入依赖

        <dependency><groupId>com.github.seancfoley</groupId><artifactId>ipaddress</artifactId><version>5.3.3</version></dependency>

IP匹配库工具类

package com.chun.utils;import inet.ipaddr.AddressStringException;
import inet.ipaddr.IPAddress;
import inet.ipaddr.IPAddressSeqRange;
import inet.ipaddr.IPAddressString;
import org.apache.commons.net.util.SubnetUtils;import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.math.BigInteger;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;/*** @author chun* @date 2023/12/14 16:24*/
public class IPMatcher {private static List<IPAddressSeqRange> ipRanges = new ArrayList<>();public static void readFile(File file) {try (BufferedReader reader = new BufferedReader(new FileReader(file))) {String line;while ((line = reader.readLine()) != null) {setIpRanges(line);}} catch (IOException e) {e.printStackTrace();}}public static boolean isIpRanges(String address) throws AddressStringException {for (IPAddressSeqRange ipRange : ipRanges) {boolean contains = ipRange.contains(new IPAddressString(address).toAddress());if (contains) {return true;}}return false;}public static void setIpRanges(String cidrAddress) {String startAddress = "";String endAddress = "";try {String[] split = cidrAddress.split("\\/");SubnetUtils utils = new SubnetUtils(cidrAddress);SubnetUtils.SubnetInfo subnetInfo = utils.getInfo();if (split[1].equals("32")) {startAddress = split[0];endAddress = split[0];} else {startAddress = subnetInfo.getLowAddress();endAddress = subnetInfo.getHighAddress();}System.out.println("IP CIDR=" + cidrAddress + "，IP范围：[" + startAddress + ", " + endAddress + "]");} catch (IllegalArgumentException e) {try {InetAddress networkAddress = InetAddress.getByName(cidrAddress.split("/")[0]);int subnetPrefixLength = Integer.parseInt(cidrAddress.split("/")[1]);BigInteger start = getStartAddress(networkAddress, subnetPrefixLength);BigInteger end = getEndAddress(start, subnetPrefixLength);startAddress = getAddressFromBigInteger(start);endAddress = getAddressFromBigInteger(end);System.out.println("IP CIDR=" + cidrAddress + "，IP范围：[" + startAddress + ", " + endAddress + "]");} catch (UnknownHostException ex) {ex.printStackTrace();}}IPAddress startIPAddress = new IPAddressString(startAddress).getAddress();IPAddress endIPAddress = new IPAddressString(endAddress).getAddress();ipRanges.add(startIPAddress.toSequentialRange(endIPAddress));}private static BigInteger getStartAddress(InetAddress networkAddress, int subnetPrefixLength) {ByteBuffer buffer = ByteBuffer.wrap(networkAddress.getAddress());BigInteger start = new BigInteger(1, buffer.array());return start.shiftRight(128 - subnetPrefixLength).shiftLeft(128 - subnetPrefixLength);}private static BigInteger getEndAddress(BigInteger start, int subnetPrefixLength) {BigInteger hostCount = BigInteger.ONE.shiftLeft(128 - subnetPrefixLength);return start.add(hostCount).subtract(BigInteger.ONE);}private static String getAddressFromBigInteger(BigInteger address) {byte[] bytes = address.toByteArray();InetAddress inetAddress;try {if (bytes.length == 16) {inetAddress = InetAddress.getByAddress(bytes);} else {byte[] paddedBytes = new byte[16];System.arraycopy(bytes, 0, paddedBytes, 16 - bytes.length, bytes.length);inetAddress = InetAddress.getByAddress(paddedBytes);}return inetAddress.getHostAddress();} catch (UnknownHostException e) {e.printStackTrace();}return null;}
}

构建匹配库和读取配置文件

package com.chun.conf;import com.chun.utils.IPMatcher;
import lombok.extern.slf4j.Slf4j;import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;/*** @author chun* @date 2023/12/14 15:58*/
@Slf4j
public class ReadConf {public static String url;public static String userName;public static String passWord;public static String userIpDir;public static String userIpFileMatch;public static void initPropertoesConf() throws IOException {Properties properties = new Properties();FileInputStream file = new FileInputStream(System.getProperty("user.dir") + "/test_pgsql/etc/conf.properties");properties.load(file);url = properties.getProperty("pgsql.url");userName = properties.getProperty("pgsql.userName");passWord = properties.getProperty("pgsql.passWord");userIpDir = properties.getProperty("user.ip.filepath");userIpFileMatch = properties.getProperty("user.ip.fileMatch");}public static void initUserIpConf() throws Exception {File[] files = getFiles(userIpDir, userIpFileMatch);if (files == null || files.length == 0) {log.error("The conf.properties user IP file path is incorrect! IP file number is 0");return;}for (File file : files) {IPMatcher.readFile(file);}}private static File[] getFiles(String dir, String fileNameMatch) {File fileDir = new File(dir);File[] files;if (fileDir.isDirectory()) {FileFilter fileFilter = new FileFilter() {@Overridepublic boolean accept(File file) {//判断文件名是否符合通配符规则return file.getName().matches(fileNameMatch);}};files = fileDir.listFiles(fileFilter);} else {files = new File[1];files[0] = fileDir;}return files;}
}

conf.properties

pgsql.url=jdbc:postgresql://localhost:5432/School
pgsql.userName=postgres
pgsql.passWord=123456
user.ip.filepath=E:\\ProjectWorker\\TestJob\\test_pgsql\\etc\\
user.ip.fileMatch=ip.*

测试

传入文件列表：文件内容如下：

192.168.12.5/32
192.177.12.1/24
192.169.12.1/16
2001:0db8:85a3::/64
2001:0db8:85a4::/128

@Slf4j
public class Main {public static void main(String[] args) {ReadConf.initPropertoesConf();log.info("Start read conf.properties success!");ReadConf.initUserIpConf();log.info("Start read ip conf success!");System.out.println(IPMatcher.isIpRanges("192.168.1.1"));System.out.println(IPMatcher.isIpRanges("192.168.12.5"));System.out.println(IPMatcher.isIpRanges("192.177.12.1"));System.out.println(IPMatcher.isIpRanges("192.177.255.1"));System.out.println(IPMatcher.isIpRanges("192.169.255.254"));System.out.println(IPMatcher.isIpRanges("192.170.255.254"));System.out.println(IPMatcher.isIpRanges("2001:0db8:85a3::1234"));System.out.println(IPMatcher.isIpRanges("2001:0db8:85a4::ffff"));System.out.println(IPMatcher.isIpRanges("2001:0db8:85a4::"));}
}

结果

[INFO ] 2023-12-15 10:01:46.879 - Start read conf.properties success!
IP CIDR=192.168.12.5/32，IP范围：[192.168.12.5, 192.168.12.5]
IP CIDR=192.177.12.1/24，IP范围：[192.177.12.1, 192.177.12.254]
IP CIDR=192.169.12.1/16，IP范围：[192.169.0.1, 192.169.255.254]
IP CIDR=2001:0db8:85a3::/64，IP范围：[2001:db8:85a3:0:0:0:0:0, 2001:db8:85a3:0:ffff:ffff:ffff:ffff]
IP CIDR=2001:0db8:85a4::/128，IP范围：[2001:db8:85a4:0:0:0:0:0, 2001:db8:85a4:0:0:0:0:0]
[INFO ] 2023-12-15 10:01:47.145 - Start read ip conf success!
false
true
true
false
true
false
true
false
true

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