通过Java实现IPv6地址简写和全写互相转换方法
IPv6地址简写和全写的一种转换方法,入参IPv6地址合法性不做校验。只对合法的IPv6地址进行简写、非简写的转换
package com.test;import com.sun.deploy.util.StringUtils;
import java.util.Arrays;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class transIPv6{
public static String getFullIPv6(String ipv6){
//入参为::时,此时全为0
if (ipv6.equals("::")){
return "0000:0000:0000:0000:0000:0000:0000:0000";
}
//入参已::结尾时,直接在后缀加0
if (ipv6.endsWith("::")) {
ipv6 += "0";
}
String[] arrs=ipv6.split(":");
String symbol="::";
int arrleng=arrs.length;
System.out.println(arrleng);
while (arrleng<8){
symbol+=":";
arrleng++;
}
ipv6=ipv6.replace("::",symbol);
System.out.println("ipv6:"+ipv6);
String fullip="";
for (String ip:ipv6.split(":")){
while (ip.length()<4){
ip="0"+ip;
}
fullip+=ip+\':\';
}
return fullip.substring(0,fullip.length()-1);
}
public static String getShortIPv6(String ipv6){
String shortIP="";
ipv6=getFullIPv6(ipv6);
String[] arr = ipv6.split(":");
//去掉每组数据前的0
for (int i = 0; i < arr.length; i++){
arr[i] = arr[i].replaceAll("^0{1,3}", "");
}
//最长的连续0
String[] arr2 = arr.clone();
for (int i = 0; i < arr2.length; i++){
if (!"0".equals(arr2[i])){
arr2[i] = "-";
}
}
Pattern pattern = Pattern.compile("0{2,}");
Matcher matcher = pattern.matcher(StringUtils.join(Arrays.asList(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();
}
}
// 组合IPv6简写地址
if(maxStr.length()>0) {
for (int i = start; i < end; i++){
arr[i] = ":";
}
}
shortIP = StringUtils.join(Arrays.asList(arr), ":");
shortIP= shortIP.replaceAll(":{2,}", "::");
return shortIP;
}
public static void main(String[] args) {
String ipv6="1::1";
System.out.println(getFullIPv6(ipv6));
// System.out.println(getShorIPv6(ipv6));
}
}
以上是 通过Java实现IPv6地址简写和全写互相转换方法 的全部内容, 来源链接: utcz.com/z/392105.html