这篇文章主要介绍了基于Java检查IPv6地址的合法性,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

由于IPv4资源即将耗尽，IPv6将要正式启用，这是大势所趋。

一些现有的服务和应用逐步要对IPv6支持，目前还处在过渡阶段。

提前了解一些IPv6的知识，还是有必要的。

如何判断一个IP地址，是否为IPv6地址呢？

以下代码是用Java实现的，用于校验IPv6地址合法性。

代码如下：

import java.text.Normalizer;import java.text.Normalizer.Form;import java.util.regex.Matcher;import java.util.regex.Pattern;public class IPV6Check { public static void main(String[] args) { String ipv6_1 = "2019:db8:a583:64:c68c:d6df:600c:ee9a"; String ipv6_2 = "2019:db8:a583::9e42:be55:53a7"; String ipv6_3 = "2019:db8:a583:::9e42:be55:53a7"; String ipv6_4 = "1:2:3:4:5::192.168.254.254"; String ipv6_5 = "ABCD:910A:2222:5498:8475:1111:3900:2020"; String ipv6_6 = "1030::C9B4:FF12:48AA:1A2B"; String ipv6_7 = "2019:0:0:0:0:0:0:1"; String ipv6_8 = "::0:0:0:0:0:0:1"; String ipv6_9 = "2019:0:0:0:0::"; String ipv6_10= "2048:877e:31::7"; String resultLine = "\n==> "; String splitLine = "\n----------------------------------------------------\n"; System.out.println(ipv6_1 + resultLine + isValidIpv6Addr(ipv6_1) + splitLine); System.out.println(ipv6_2 + resultLine + isValidIpv6Addr(ipv6_2) + splitLine); System.out.println(ipv6_3 + resultLine + isValidIpv6Addr(ipv6_3) + splitLine); System.out.println(ipv6_4 + resultLine + isValidIpv6Addr(ipv6_4) + splitLine); System.out.println(ipv6_5 + resultLine + isValidIpv6Addr(ipv6_5) + splitLine); System.out.println(ipv6_6 + resultLine + isValidIpv6Addr(ipv6_6) + splitLine); System.out.println(ipv6_7 + resultLine + isValidIpv6Addr(ipv6_7) + splitLine); System.out.println(ipv6_8 + resultLine + isValidIpv6Addr(ipv6_8) + splitLine); System.out.println(ipv6_9 + resultLine + isValidIpv6Addr(ipv6_9) + splitLine); System.out.println(ipv6_10 + resultLine + isValidIpv6Addr(ipv6_10) + splitLine); } /** * 校验IPv6地址的合法性 * @param ipAddr * @return */ public static boolean isValidIpv6Addr(String ipAddr) { String regex = "(^((([0-9A-Fa-f]{1,4}:){7}(([0-9A-Fa-f]{1,4}){1}|:))" + "|(([0-9A-Fa-f]{1,4}:){6}((:[0-9A-Fa-f]{1,4}){1}|" + "((22[0-3]|2[0-1][0-9]|[0-1][0-9][0-9]|" + "([0-9]){1,2})([.](25[0-5]|2[0-4][0-9]|" + "[0-1][0-9][0-9]|([0-9]){1,2})){3})|:))|" + "(([0-9A-Fa-f]{1,4}:){5}((:[0-9A-Fa-f]{1,4}){1,2}|" + ":((22[0-3]|2[0-1][0-9]|[0-1][0-9][0-9]|" + "([0-9]){1,2})([.](25[0-5]|2[0-4][0-9]|" + "[0-1][0-9][0-9]|([0-9]){1,2})){3})|:))|" + "(([0-9A-Fa-f]{1,4}:){4}((:[0-9A-Fa-f]{1,4}){1,3}" + "|:((22[0-3]|2[0-1][0-9]|[0-1][0-9][0-9]|" + "([0-9]){1,2})([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|" + "([0-9]){1,2})){3})|:))|(([0-9A-Fa-f]{1,4}:){3}((:[0-9A-Fa-f]{1,4}){1,4}|" + ":((22[0-3]|2[0-1][0-9]|[0-1][0-9][0-9]|" + "([0-9]){1,2})([.](25[0-5]|2[0-4][0-9]|" + "[0-1][0-9][0-9]|([0-9]){1,2})){3})|:))|" + "(([0-9A-Fa-f]{1,4}:){2}((:[0-9A-Fa-f]{1,4}){1,5}|" + ":((22[0-3]|2[0-1][0-9]|[0-1][0-9][0-9]|" + "([0-9]){1,2})([.](25[0-5]|2[0-4][0-9]|" + "[0-1][0-9][0-9]|([0-9]){1,2})){3})|:))" + "|(([0-9A-Fa-f]{1,4}:){1}((:[0-9A-Fa-f]{1,4}){1,6}" + "|:((22[0-3]|2[0-1][0-9]|[0-1][0-9][0-9]|" + "([0-9]){1,2})([.](25[0-5]|2[0-4][0-9]|" + "[0-1][0-9][0-9]|([0-9]){1,2})){3})|:))|" + "(:((:[0-9A-Fa-f]{1,4}){1,7}|(:[fF]{4}){0,1}:((22[0-3]|2[0-1][0-9]|" + "[0-1][0-9][0-9]|([0-9]){1,2})" + "([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|([0-9]){1,2})){3})|:)))$)"; if (ipAddr == null) { System.out.println("IPv6 address is null "); return false; } ipAddr = Normalizer.normalize(ipAddr, Form.NFKC); Pattern pattern = Pattern.compile(regex); Matcher matcher = pattern.matcher(ipAddr); boolean match = matcher.matches(); if (!match) { System.out.println("Invalid IPv6 address = " + ipAddr); } return match; } }

运行结果如下：

2019:db8:a583:64:c68c:d6df:600c:ee9a==> true----------------------------------------------------2019:db8:a583::9e42:be55:53a7==> true----------------------------------------------------Invalid IPv6 address = 2019:db8:a583:::9e42:be55:53a72019:db8:a583:::9e42:be55:53a7==> false----------------------------------------------------1:2:3:4:5::192.168.254.254==> true----------------------------------------------------ABCD:910A:2222:5498:8475:1111:3900:2020==> true----------------------------------------------------1030::C9B4:FF12:48AA:1A2B==> true----------------------------------------------------2019:0:0:0:0:0:0:1==> true----------------------------------------------------::0:0:0:0:0:0:1==> true----------------------------------------------------2019:0:0:0:0::==> true----------------------------------------------------2048:877e:31::7==> true----------------------------------------------------

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