获取IP地址的方法

1、 public static String getIP() {
    String IP = "";
    InetAddress addr = null;
    try {
      addr = InetAddress.getLocalHost();
      IP = addr.getHostAddress().toString();
      return IP;
    } catch (UnknownHostException e1) {
         IP = "0.0.0.0";
    }
    return IP;

}

 

这个语句在Windows下可以获得172.16.*.*的正常IP地址，在Linux下只能到127.0.0.1的回路IP

2、

publicclass TestInetAddress {
    publicstaticvoid main(String[] args) {
        Enumeration<NetworkInterface> netInterfaces =null;
        try {
            netInterfaces = NetworkInterface.getNetworkInterfaces();

            while (netInterfaces.hasMoreElements()) {

                NetworkInterface ni = netInterfaces.nextElement();
                System.out.println("DisplayName:"+ ni.getDisplayName());
                System.out.println("Name:"+ ni.getName());

                Enumeration<InetAddress> ips = ni.getInetAddresses();
                while (ips.hasMoreElements()) {
                    System.out.println("IP:"
                            + ips.nextElement().getHostAddress());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    publicstaticvoid main2(String[] args) {
        Enumeration netInterfaces =null;
        try {
            netInterfaces = NetworkInterface.getNetworkInterfaces();

            while (netInterfaces.hasMoreElements()) {

                NetworkInterface ni = (NetworkInterface) netInterfaces
                        .nextElement();
                System.out.println("DisplayName:"+ ni.getDisplayName());
                System.out.println("Name:"+ ni.getName());

                Enumeration ips = ni.getInetAddresses();
                while (ips.hasMoreElements()) {
                    System.out.println("IP:"
                            + ((InetAddress) ips.nextElement())
                                    .getHostAddress());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}