使用InetAddress.getLocalHost().getHostAddress()读取host文件，在linux中获取ip时将获取127.0.0.1。

这里通过“can use getNetworkInterfaces()+getInetAddresses() to obtain all IP addresses for this node”获取本本地真实IP，方法：NetworkInterface.getNetworkInterfaces()

window下：

linux下：

package muyunfei.getip;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;
//牟云飞  muyunfei
public class GetIpMain {
	public static void main(String[] args) {
		try {
			//使用InetAddress.getLocalHost().getHostAddress()打印
			System.out.println("InetAddress.getLocalHost().getHostAddress():"+InetAddress.getLocalHost().getHostAddress());     
			System.out.println("打印所有IP列表信息：");
			GetIpMain ip = new GetIpMain();
			System.out.println("本机地址："+ip.getIpAdd());
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	/**
	 * 根据网卡获得IP地址
	 * @return
	 * @throws SocketException
	 * @throws UnknownHostException
	 */
	public  String getIpAdd() throws SocketException, UnknownHostException{
		String ip="";
		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();) {
                    //获得IP
                	InetAddress inetAddress = enumIpAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress()) {
                        String ipaddress = inetAddress.getHostAddress().toString();
                        if (!ipaddress.contains("::") && !ipaddress.contains("0:0:") && !ipaddress.contains("fe80")) {
                            
                        	System.out.println(ipaddress);
                            if(!"127.0.0.1".equals(ip)){
                            	ip = ipaddress;
                            }
                        }
                    }
                }
            }
        }
		return ip;
	}
}