判断一个url是否合法

public class Tools {private static String pattern = "^([hH][tT]{2}[pP]://|[hH][tT]{2}[pP][sS]://)(([A-Za-z0-9-~]+).)+([A-Za-z0-9-~\\/])+$";/*** 判断 url 是否合法*/public static boolean isUrl(String url) {Pattern httpPattern = pile(pattern);if (httpPattern.matcher(url).matches()) {return true;}return false;}}