NetworkInterface表示物理硬件和虚拟地址。

InetAddress是ip地址的高级表示。

通过两个接口获取服务器ip地址

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
List<String> IPLst = new ArrayList<String>();
try {
Enumeration<NetworkInterface> netInterfaces = NetworkInterface.getNetworkInterfaces();
InetAddress ip = null;
boolean finded = false;// 是否找到外网IP
while (netInterfaces.hasMoreElements() && !finded) {
NetworkInterface ni = netInterfaces.nextElement();
Enumeration<InetAddress> address = ni.getInetAddresses();
        while (address.hasMoreElements()) {
ip = address.nextElement();
if (!ip.isSiteLocalAddress() && !ip.isLoopbackAddress()
&& ip.getHostAddress().indexOf(":") == -1) {// 外网IP
netip = ip.getHostAddress();
finded = true;
IPLst.add(netip);
break;
} else if (ip.isSiteLocalAddress() && !ip.isLoopbackAddress()
&& ip.getHostAddress().indexOf(":") == -1) {// 内网IP
localip = ip.getHostAddress();
IPLst.add(localip);
        }
        }
        }