工具类，获取当前机器物理网卡信息，包括IP、Mac地址等

Utils.java

public class Utils {
  
      //ipv4的判断规则
  private static final Pattern IPV4 = Pattern.compile("((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\\.|$)){4}");
  
  
  /**
   * 这个过滤了 是回路的地址
   * 
   * */
  public static List<String> getIpAddresses() {
        Set<String> ipAddresses= new HashSet();
        
        try {
            Enumeration<NetworkInterface> enumeration = NetworkInterface.getNetworkInterfaces();
            
            while (enumeration.hasMoreElements()) {
                NetworkInterface ifc = enumeration.nextElement();
                if (ifc != null && ifc.isUp()) {
                    Enumeration<InetAddress> addresses = ifc.getInetAddresses();
                    
                    while (addresses.hasMoreElements()) {
                        InetAddress address = addresses.nextElement();
                        if (address != null && !address.isLoopbackAddress() && isIpv4(address.getHostAddress())) {
                            ipAddresses.add(address.getHostAddress());
                        }
                    }
                }
            }
            
        } catch (SocketException e) {
            logger.error("无法获取本地网卡信息" + e.getMessage());
        }
        
        return new ArrayList(ipAddresses);
    }
  
    public static boolean isIpv4(String ip) {
        return IPV4.matcher(ip).matches();
    }
  
  
    public static List<String> getMacAddresses() {
        Set<String> macAddresses = Sets.newHashSet();
        
        try {
            Enumeration<NetworkInterface> enumeration = NetworkInterface.getNetworkInterfaces();
            
            while (enumeration.hasMoreElements()) {
                NetworkInterface ifc = enumeration.nextElement();
                if (ifc != null && ifc.isUp()) {
                    byte[] macBytes = ifc.getHardwareAddress();
                    if (macBytes != null) {
                        String mac = new String(Hex.encodeHex(macBytes));
                        if (StringUtils.length(mac) == 12) {
                            macAddresses.add(mac);
                        }
                    }
                }
            }
            
        } catch (SocketException e) {
            logger.error("无法获取本地MAC信息" + e.getMessage());
        }
        
        return Lists.newArrayList(macAddresses);
    }
    
}