java获取本机ip的方法

1.  inetAddress类

通过InetAddress的实例对象包含以数字形式保存的IP地址，同时还可能包含主机名（如果使用主机名来获取InetAddress的实例，或者使用数字来构造，并且启用了反向主机名解析的功能）。InetAddress类提供了将主机名解析为IP地址（或反之）的方法。其生成InetAddress对象的方法

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.UnknownHostException;

public class Main {
    public static void main(String[] args) throws UnknownHostException {
        //Inet4Address address= (Inet4Address) Inet4Address.getLocalHost();
        InetAddress address = InetAddress.getLocalHost();
        System.out.println(address);//获取计算机名称和ip地址
        String hostAddress = address.getHostAddress();
        System.out.println(hostAddress);//获取ip地址
        String hostName = address.getHostName();
        System.out.println(hostName);//获取计算机名称
    }
}

 2.封装方法

    public static String getLocalIp() {
        Enumeration netInterfaces = null;
        try {
            netInterfaces = NetworkInterface.getNetworkInterfaces();
            while (netInterfaces.hasMoreElements()) {
                NetworkInterface nif = netInterfaces.nextElement();
                Enumeration InetAddress = nif.getInetAddresses();
                while (InetAddress.hasMoreElements()) {
                    String ip = InetAddress.nextElement().getHostAddress();
                    if (ip.startsWith("192.168")) {
                        return ip;
                    }
                }
            }
        } catch (SocketException e) {
        }
        return "127.0.0.1";
    }