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deepti sharma
How can we fetch data in ajax through servlet?
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January 12, 2012 at 3:08 PM
"mainpage.jsp"
<html>
<head>
<title>Ajax Example</title>
<script language="Javascript">
function postRequest(strURL) {
var xmlHttp;
if (window.XMLHttpRequest) { // Mozilla, Safari, ...
var xmlHttp = new XMLHttpRequest();
} else if (window.ActiveXObject) { // IE
var xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlHttp.open('GET', strURL, true);
xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState == 4) {
updatepage(xmlHttp.responseText);
}
}
xmlHttp.send(strURL);
}
function updatepage(str){
document.getElementById("result").innerHTML =
"<font color='red' size='5'>" + str + "</font>";;
}
function showCurrentTime(){
var rnd = Math.random();
var url="showTime";
postRequest(url);
}
</script>
</head>
<body>
<h1 align="center"><font color="#000080">Ajax Example</font></h1>
<p><font color="#000080"> This very simple Ajax Example retrieves the
current date and time from server and shows on the form. To view the current
date and time click on the following button.</font></p>
<form name="f1">
<p align="center"><font color="#000080"> <input value=" Show Time "
type="button" onclick='JavaScript:showCurrentTime()' name="showdate"></font></p>
<div id="result" align="center"></div>
</form>
<div id=result></div>
</body>
</html>
"MyServletAjax.java"
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
public class MyServletAjax extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException,IOException{
response.setContentType("text/html");
Date date = new Date();
PrintWriter pw = response.getWriter();
pw.println(date);
}
}
"web.xml"
<servlet> <servlet-name>myservletajax</servlet-name> <servlet-class>MyServletAjax</servlet-class> </servlet> <servlet-mapping> <servlet-name>myservletajax</servlet-name> <url-pattern>/myServletAjax</url-pattern> </servlet-mapping>
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