java获取机器名及所有网卡IP

获取机器名：

    public String getLocalHostName() {
        String hostName;
        try {
            InetAddress addr = InetAddress.getLocalHost();
            hostName = addr.getHostName();
        } catch (Exception ex) {
            hostName = "";
        }
        return hostName;
    }

获取IP(多个网卡时获取了多个IP)：

    public List getNetworkAddress() {
        List result = new ArrayList();
        Enumeration netInterfaces;
        try {
            netInterfaces = NetworkInterface.getNetworkInterfaces();
            InetAddress ip;
            while (netInterfaces.hasMoreElements()) {
                NetworkInterface ni = netInterfaces.nextElement();
                Enumeration addresses=ni.getInetAddresses();
                while(addresses.hasMoreElements()){
                    ip = addresses.nextElement();
                    if (!ip.isLoopbackAddress() && ip.getHostAddress().indexOf(':') == -1) {
                        result.add(ip.getHostAddress());
                    }
                }
            }
            return result;
        } catch (Exception e) {
            return null;
        }
    }