index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>AJAX calls using Jquery in Servlet</title>
<script src="http://code.jquery.com/jquery-latest.js">
</script>
<script>
$(document).ready(function() {
$('#submit').click(function(event) {
var username = $('#user').val();
$.post('ActionServlet', {
u : username
}, function(responseText) {
$('#welcometext').text(responseText);
});
});
});
</script>
</head>
<body>
<form id="form1">
<h1>AJAX Demo using Jquery in JSP and Servlet</h1>
Enter your Name: <input type="text" id="user" />
<input type="button" id="submit" value="Ajax Submit" />
<br />
<div id="welcometext">Here goes your text</div>
</form>
</body>
</html>
ActionServlet.java
package com.t4b.ajax.test;
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;
/**
* Servlet implementation class ActionServlet
*/
@WebServlet("/ActionServlet")
public class ActionServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public ActionServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String name = null;
name = "Hello " + request.getParameter("u");
if (request.getParameter("u").toString().equals("")) {
name = "Hello User";
}
response.setContentType("text/plain");
response.setCharacterEncoding("UTF-8");
response.getWriter().write(name);
}
}
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