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JAVA獲取IP地址

 昵稱22369024 2015-04-27
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"

    } 

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