复制代码 代码如下:

public static String getHost(String url){

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

return "";

}

String host = "";

Pattern p = Pattern.compile("(?<=//|)((w)+.)+w+");

Matcher matcher = p.matcher(url);

if(matcher.find()){

host = matcher.group();

}

return host;

}