基于Java检查IPv6地址的合法性

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:be55:53a7
2019: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
----------------------------------------------------

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。