windows和linux获取本机ip

InetAddress.getLocalHost().getHostAddress()
获取本机ip在linux上报错: Caused by: java.net.UnknownHostException

信息如下

Caused by: java.net.UnknownHostException: host-xxx: Name or service not known
	at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
	at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:929)
	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1324)
	at java.net.InetAddress.getLocalHost(InetAddress.java:1501)
	... 76 common frames omitted

原因:上边的代码只能在windows获取ip,在linux上不行(linux解决方案也行,但是一般开发没运维那么大的权限啊!!!)

java代码解决方案:

package cxshyf.msjt.sign.utils;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;

/**
 * 常用工具类
 */
public class IPUtils {

    /**
     * 获取本地IP地址
     *
     * @throws SocketException
     */
    public static String getLocalIP() throws UnknownHostException {
        if (isWindowsOS()) {
            return InetAddress.getLocalHost().getHostAddress();
        } else {
            return getLinuxLocalIp();
        }
    }

    /**
     * 判断操作系统是否是Windows
     *
     * @return
     */
    public static boolean isWindowsOS() {
        boolean isWindowsOS = false;
        String osName = System.getProperty("os.name");
        if (osName.toLowerCase().indexOf("windows") > -1) {
            isWindowsOS = true;
        }
        return isWindowsOS;
    }


    /**
     * 获取Linux下的IP地址
     *
     * @return IP地址
     * @throws SocketException
     */
    private static String getLinuxLocalIp() {
        String ip = "";
        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements(); ) {
                NetworkInterface intf = en.nextElement();
                String name = intf.getName();
                if (!name.contains("docker") && !name.contains("lo")) {
                    for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements(); ) {
                        InetAddress inetAddress = enumIpAddr.nextElement();
                        if (!inetAddress.isLoopbackAddress()) {
                            String ipaddress = inetAddress.getHostAddress();
                            if (!ipaddress.contains("::") && !ipaddress.contains("0:0:") && !ipaddress.contains("fe80")) {
                                ip = ipaddress;
                                System.out.println(ipaddress);
                            }
                        }
                    }
                }
            }
        } catch (SocketException ex) {
            System.out.println("获取ip地址异常");
            ip = "127.0.0.1";
            ex.printStackTrace();
        }
        return ip;
    }
}

参考:

• https://www.cnblogs.com/raphael5200/p/5996464.html