eagle-core/src/main/java/eagle/jfaster/org/util/IpUtil.java
public static String getIp() {
        if (null != cachedIpAddress) {
            return cachedIpAddress;
        }
        Enumeration<NetworkInterface> netInterfaces;
        try {
            netInterfaces = NetworkInterface.getNetworkInterfaces();
        } catch (final SocketException ex) {
            throw new EagleFrameException(ex);
        }
        String localIpAddress = null;
        while (netInterfaces.hasMoreElements()) {
            NetworkInterface netInterface = netInterfaces.nextElement();
            Enumeration<InetAddress> ipAddresses = netInterface.getInetAddresses();
            while (ipAddresses.hasMoreElements()) {
                InetAddress ipAddress = ipAddresses.nextElement();
                if (isPublicIpAddress(ipAddress)) {
                    String publicIpAddress = ipAddress.getHostAddress();
                    cachedIpAddress = publicIpAddress;
                    return publicIpAddress;
                }
                if (isLocalIpAddress(ipAddress)) {
                    localIpAddress = ipAddress.getHostAddress();
                }
            }
        }
        cachedIpAddress = localIpAddress;
        return localIpAddress;
    }
public static String getIp() {
        if (null != cachedIpAddress) {
            return cachedIpAddress;
        }
        Enumeration<NetworkInterface> netInterfaces;
        try {
            netInterfaces = NetworkInterface.getNetworkInterfaces();
        } catch (final SocketException ex) {
            throw new EagleFrameException(ex);
        }
        String localIpAddress = null;
        while (netInterfaces.hasMoreElements()) {
            NetworkInterface netInterface = netInterfaces.nextElement();
            Enumeration<InetAddress> ipAddresses = netInterface.getInetAddresses();
            while (ipAddresses.hasMoreElements()) {
                InetAddress ipAddress = ipAddresses.nextElement();
                if (isPublicIpAddress(ipAddress)) {
                    String publicIpAddress = ipAddress.getHostAddress();
                    cachedIpAddress = publicIpAddress;
                    return publicIpAddress;
                }
                if (isLocalIpAddress(ipAddress)) {
                    localIpAddress = ipAddress.getHostAddress();
                }
            }
        }
        cachedIpAddress = localIpAddress;
        return localIpAddress;
    }
获取本机IP地址.

<p>
有限获取外网IP地址.
也有可能是链接着路由器的最终IP地址.
</p>

@return 本机IP地址