Java获取/检验IP

 package com.example.demo.utils;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Ip相关工具类
 */public class IpUtil {


    /**
     * 校验ip
     * @param ip
     * @return
     */    public static boolean checkIp(String ip) {

        String pattern = "((2(5[0-5]|[0-4]d))|[0-1]?d{1,2})(.((2(5[0-5]|[0-4]d))|[0-1]?d{1,2})){3}";
        Pattern r = Pattern.compile(pattern);
        Matcher m = r.matcher(ip);
        if (m.matches()) return true;

        return false;
    }

    /**
     * 获取本机ip地址
     * @return
     */    public static String getHostIp()
    {
        try
        {
            return InetAddress.getLocalHost().getHostAddress();
        }
        catch (UnknownHostException e)
        {
        }
        return "127.0.0.1";
    }

    /**
     * 获取本机设备名称
     * @return
     */    public static String getHostName()
    {
        try
        {
            return InetAddress.getLocalHost().getHostName();
        }
        catch (UnknownHostException e)
        {
        }
        return "未知";
    }

    public static void main(String[] args) {
        System.out.println(checkIp("192.168.114.161"));
        System.out.println(getHostIp());
        System.out.println(getHostName());
    }



}