java 获取本机的IP地址

方法一：这种方式有一定的局限性，在Linux下的执行结果是：本机的IP = xxx/127.0.1.1 (其中xxx是你的计算机名）

public void getLocalIPAddress() {
        try {
            InetAddress inetAddress = InetAddress.getLocalHost();
            String localIP = inetAddress.getHostAddress().trim();
            System.out.println(localIP);
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
}

方法二：

private InetAddress getLocalIPAddress() {
        InetAddress ip = null;
        try {
            Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();
            while (allNetInterfaces.hasMoreElements()) {
                NetworkInterface netInterface = allNetInterfaces.nextElement();
                Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
                while (addresses.hasMoreElements()) {
                    ip = addresses.nextElement();
                    if (ip != null && ip instanceof Inet4Address) {
                        return ip.getLocalHost();
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ip;
    }