package com.yuanchung.sales.util;

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

/**
 * 工具類
 * @author LuWenBang
 *
 */
public class UtilGetIp {
	public static String getIp() {
		String localip = null;// 本地IP，如果沒有配置外網IP則返回它
		String netip = null;// 外網IP
		
		try {
			Enumeration<NetworkInterface> netInterfaces = NetworkInterface.getNetworkInterfaces();
			
			InetAddress ip = null;
			boolean finded = false;// 是否找到外網IP
			
			while (netInterfaces.hasMoreElements() && !finded) {
				NetworkInterface ni = netInterfaces.nextElement();
				Enumeration<InetAddress> address = ni.getInetAddresses();
				
				while (address.hasMoreElements()) {
					ip = address.nextElement();
					
					System.out.println(ni.getName() + ";" + ip.getHostAddress()
							+ ";ip.isSiteLocalAddress()="
							+ ip.isSiteLocalAddress()
							+ ";ip.isLoopbackAddress()="
							+ ip.isLoopbackAddress());
					if (!ip.isSiteLocalAddress() && !ip.isLoopbackAddress()
							&& ip.getHostAddress().indexOf(":") == -1) {// 外網IP
						netip = ip.getHostAddress();
						System.out.println("外網IP地址是："+netip);
						finded = true;
						break;
					} else if (ip.isSiteLocalAddress()
							&& !ip.isLoopbackAddress()
							&& ip.getHostAddress().indexOf(":") == -1) {// 內網IP
						localip = ip.getHostAddress();
					}
				}
			}
		} catch (SocketException e) {
			e.printStackTrace();
		}
		if (netip != null && !"".equals(netip)) {
			return netip;
		} else {
			return localip;
		}
	}
}