java根据url获取完整域名

    private String getDomain(String destination){

        if(destination==null||destination.trim().equals("")){

         return "";

        }

        String domain = "";

        URL url =null;

        try {

            url= new URL(destination);

            domain =url.getProtocol()+"://"+url.getHost();

        } catch (MalformedURLException e) {

            LOG.info("url=["+destination+"] not correct! ");;

        }

        return domain;

       }