package testing;
import java.net.*;
import java.io.*;
public class Functions {
    public static String conTime(String urlString) {
          try{
              URL url = new URL(urlString);
              HttpURLConnection conn = (HttpURLConnection)url.openConnection();
              conn.setConnectTimeout(100);
              conn.connect();
              return  "Response code is " + conn.getResponseCode();
          }catch(Exception ioe){return ioe.toString();}
    }
}       
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<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
  version="2.0">
  <tlib-version>1.0</tlib-version>
  <short-name>Functions</short-name>
  <uri>http://tester.com</uri>
<function>
    <name>conTime</name>
    <function-class>testing.Functions</function-class>
    <function-signature>
        java.lang.String conTime(java.lang.String)
    </function-signature>
</function>
</taglib>
-----------------------------------------------------------------
<%@ page import="java.net.*" %>
<%@taglib prefix="cto" uri="http://tester.com" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<c:out value="${cto:conTime('http://www.google.com')}"/>