JAVA獲取IP地址

昵稱22369024 2015-04-27

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public static String getIp(){
        String localip=null;//本地IP，如果沒有配置外網(wǎng)IP則返回它
        String netip=null; //外網(wǎng)IP
        try {
            Enumeration<NetworkInterface> netInterfaces = NetworkInterface.getNetworkInterfaces();
            while( netInterfaces.hasMoreElements() ) {
                NetworkInterface ni = netInterfaces.nextElement();
                Enumeration<InetAddress> address = ni.getInetAddresses();
                while( address.hasMoreElements() ) {
                   InetAddress ip=address.nextElement();
                    System.out.println( "interface name: "+ni.getName()
                                       + "; IP: "+ip.getHostAddress()
                                       + "; Site local address:"+ip.isSiteLocalAddress()
                                       + "; Loopback address: "+ip.isLoopbackAddress() );
                    if( ip.isLoopbackAddress() || ip.getHostAddress().indexOf(":")!=-1 )
                       continue;

                    if( ip.isSiteLocalAddress() ){ //內(nèi)網(wǎng)IP
                       localip=ip.getHostAddress();
                    } else { //外網(wǎng)IP
                       netip = ip.getHostAddress();
                        break;
                    }
                }

                if( netip!=null )
                   break;
            }
        } catch (SocketException e) {
        }

        if( netip!=null )
            return netip;
        else if ( localip!=null )
            return localip;

else

return "127.0.0.1"

}