java ipv6 格式化校验

说明：prefix是带掩码的网段，address是不带掩码的地址

package com.neusoft.aclome.cmp.demo.server.util;

import javax.validation.ValidationException;
import java.net.Inet6Address;
import java.net.UnknownHostException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author zc
 * @date 2024/1/3 17:05
 * @desc ipv6 格式化
 */
public class Ipv6Util {

    private static final String IPV6_ADDRESS = "(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))";
    private static final String IPv6_SLASH_FORMAT = IPV6_ADDRESS + "/(\\d{1,3})"; // 0 -> 32
    private static final Pattern Ipv6AddressPattern = Pattern.compile(IPV6_ADDRESS);
    private static final Pattern Ipv6CidrPattern = Pattern.compile(IPv6_SLASH_FORMAT);

    public static String ipv6AddressFormat(String ipv6Address) throws RuntimeException {
        Matcher matcher = Ipv6AddressPattern.matcher(ipv6Address);
        if (matcher.matches()) {
            try {
                String ipv6Str = Inet6Address.getByName(ipv6Address).getHostAddress();
                return ipv6Str.replaceAll("((?::0\\b){2,}):?(?!\\S*\\b\\1:0\\b)(\\S*)", "::$2");
            } catch (UnknownHostException e) {
                throw new ValidationException("this ip is not valid v6 address");
            }
        } else {
            throw new ValidationException("this ip is not valid v6 address");
        }
    }

    public static String ipv6PrefixFormat(String ipv6Prefix) throws RuntimeException {
        Matcher matcher = Ipv6CidrPattern.matcher(ipv6Prefix);
        if (matcher.matches()) {
            String ip = ipv6Prefix.split("/")[0];
            String len = ipv6Prefix.split("/")[1];
            try {
                String ipv6Str = Inet6Address.getByName(ip).getHostAddress();
                return ipv6Str.replaceAll("((?::0\\b){2,}):?(?!\\S*\\b\\1:0\\b)(\\S*)", "::$2") + "/" + len;
            } catch (UnknownHostException e) {
                throw new ValidationException("this prefix is not valid v6 prefix");
            }
        } else {
            throw new ValidationException("this prefix is not valid v6 prefix");
        }
    }
}