Java获取本地的IP列表

Java 获取本地的IP列表

    public static List<String> getLocalIPList() {
        List<String> ipList = new ArrayList<String>();
        try {
            Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
            NetworkInterface networkInterface;
            Enumeration<InetAddress> inetAddresses;
            InetAddress inetAddress;
            String ip;
            while (networkInterfaces.hasMoreElements()) {
                networkInterface = networkInterfaces.nextElement();
                inetAddresses = networkInterface.getInetAddresses();
                while (inetAddresses.hasMoreElements()) {
                    inetAddress = inetAddresses.nextElement();
                    if (inetAddress != null && inetAddress instanceof Inet4Address) { // IPV4
                        ip = inetAddress.getHostAddress();
                        ipList.add(ip);
                    }
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
        return ipList;
    }

获取本机真实ip

  public static String getRealIp() throws SocketException {
    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

    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;
          break;
        } else if (ip.isSiteLocalAddress()
            && !ip.isLoopbackAddress()
            && ip.getHostAddress().indexOf(":") == -1) {// 内网IP
          localip = ip.getHostAddress();
        }
      }
    }

    if (netip != null && !"".equals(netip)) {
      return netip;
    } else {
      return localip;
    }
  }