ipv6 简写格式 与 全写格式 互转

/**
     * 将非简写的IPv6 转换成 简写的IPv6
     * @param IPv6Str
     * @return full ipv6
     */
    public static String parseFullIPv6ToAbbreviation(String IPv6Str) {
        String fullIPv6 = "";
        int count = IPv6Str.length() - IPv6Str.replaceAll(":", "").length();
        if (IPv6Str.length() != 39 || count != 7) {
            String[] ss = IPv6Str.split(":");
            StringBuilder ipStr = new StringBuilder(39);
            for (int i = 0, len = ss.length; i < len; i++) {
                if (ss[i].length() != 4) {
                    if (StringUtil.isEmpty(ss[i])) {
                        ipStr.append("0000:");
                    } else {
                        ipStr.append(String.format("%04d", Integer.parseInt(ss[i]))).append(":");
                    }
                } else {
                    ipStr.append(ss[i]).append(":");
                }
            }
            fullIPv6 = ipStr.toString();
        }
        String[] arr = fullIPv6.split(":");
        for (int i = 0, len = arr.length; i < len; i++) {
            arr[i] = arr[i].replaceAll("^0{1,3}", "");
        }

        //找到最长的连续的0
        String[] arr2 = arr.clone();
        for (int i = 0, len = arr2.length; i < len; i++) {
            if (!"0".equals(arr2[i])) {
                arr2[i] = "-";
            }
        }

        Pattern pattern = Pattern.compile("0{2,}");
        Matcher matcher = pattern.matcher(StringUtils.join(arr2, ""));
        String maxStr = "";
        int start = -1;
        int end = -1;
        while (matcher.find()) {
            if (maxStr.length() < matcher.group().length()) {
                maxStr = matcher.group();
                start = matcher.start();
                end = matcher.end();
            }
        }

        //合并        
        if (maxStr.length() > 0) {
            for (int i = start; i < end; i++) {
                arr[i] = ":";
            }
        }
        return StringUtils.join(arr, ":").replaceAll(":{2,}", "::");
    }

/**
     * 简写的IPv6 转换成 非简写的IPv6
     *
     * @param simpleIPv6
     * @return fullIPv6
     */
    public static String parseAbbreviationToFullIPv6(String simpleIPv6) {
        if ("::".equals(simpleIPv6)) {
            return "0000:0000:0000:0000:0000:0000:0000:0000";
        }
        String[] arr = new String[]{"0000", "0000", "0000", "0000", "0000", "0000", "0000", "0000"};

        if (simpleIPv6.startsWith("::")) {
            String[] tempArr = simpleIPv6.substring(2).split(":");
            for (int i = 0; i < tempArr.length; i++) {
                arr[i + 8 - tempArr.length] = String.format("%04d", Integer.parseInt(tempArr[i]));
            }
        } else if (simpleIPv6.endsWith("::")) {
            String[] tempArr = simpleIPv6.substring(0, simpleIPv6.length() - 2).split(":");
            for (int i = 0; i < tempArr.length; i++) {
                arr[i] = String.format("%04d", Integer.parseInt(tempArr[i]));
            }
        } else if (simpleIPv6.contains("::")) {
            String[] tempArr = simpleIPv6.split("::");
            String[] tempArr0 = tempArr[0].split(":");
            for (int i = 0; i < tempArr0.length; i++) {
                arr[i] = String.format("%04d", Integer.parseInt(tempArr0[i]));
            }
            String[] temp1 = tempArr[1].split(":");
            for (int i = 0; i < temp1.length; i++) {
                arr[i + 8 - temp1.length] = String.format("%04d", Integer.parseInt(temp1[i]));
            }
        } else {
            String[] tempArr = simpleIPv6.split(":");
            for (int i = 0; i < tempArr.length; i++) {
                arr[i] = String.format("%04d", Integer.parseInt(tempArr[i]));
            }
        }

        return StringUtils.join(arr, ":");
    }