package hope.ipaddress.demo;

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

/**
 * 获取当前服务器IP
 * @author hp
 *
 */
public class IpDemo {

    /**
     * @param args
     */
    public static void main(String[] args) {
        System.out.println(getMyIp());
    }

    @SuppressWarnings("rawtypes")
    public static String getMyIp() {
        String localip = null;// 本地IP，如果没有配置外网IP则返回它
        String netip = null;// 外网IP
        try {
            Enumeration netInterfaces = NetworkInterface.getNetworkInterfaces();
            InetAddress ip = null;
            boolean finded = false;// 是否找到外网IP
            while (netInterfaces.hasMoreElements() && !finded) {
                NetworkInterface ni = (NetworkInterface) netInterfaces.nextElement();
                Enumeration address = ni.getInetAddresses();
                while (address.hasMoreElements()) {
                    ip = (InetAddress) address.nextElement();
                    if (!ip.isSiteLocalAddress() && !ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1) {// 外网IP
                        netip = ip.getHostAddress();
                        finded = true;
                        break;
                    } else if (ip.isSiteLocalAddress() && !ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1) {// 内网IP
                        localip = ip.getHostAddress();
                    }
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }

        if (netip != null && !"".equals(netip)) {
            return netip;
        } else {
            return localip;
        }
    }

}