How to send request to servlet using ajax

See more:

Javascript

JSP

Hi sir,
I have written the following application for calling servlet from javascript. but servlet is not able to get request from javascript

package com.nt.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class HelloWorldServlet extends HttpServlet {

/**
*
*/
private static final long serialVersionUID = 1L;

public HelloWorldServlet() {
// TODO Auto-generated constructor stub
}

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub
resp.sendRedirect("hello-world.jsp");

resp.getOutputStream().print("Get Method-"+req.getParameter("uname"));
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub
resp.getOutputStream().print("Post Method-"+req.getParameter("uname"));
}


}


<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>




<title>Calling servlet from javascript

function callServlet(methodType)
{
document.getElementById("helloWorldForm").action="/ah";
document.getElementById("helloWorldForm").method = methodType;
document.getElementById("helloWorldForm").submit;

alert("hi");
/* var xhttp;

xhttp = new XMLHttpRequest();
xhttp.open(methodType, "ah", true);
xhttp.send();
} */







Name:
doGet
doPost




What I have tried:

Name: <input type="text" name="uname" width="20">
<button type="button" onclick="callServlet('get')">doGet</button>
<button type="button" onclick="callServlet('post')" >doPost</button>
</form>