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$.ajax() in Java ? How to use Ajax in JSP Web page,


This is the best approach to implement Ajax in a web application, now $.ajax() mostly used to implement ajax operations because we can easily send data from one web page to another.

we will use Jquery code to implement $.ajax()

Syntax of Jquery

$(document).ready(function(){

});

Syntax to implement .$ajax():-

$.ajax({

            type: "post",

            url: "urlname", //this is my servlet

            data: "args=" +value,

            success: function(msg){      

                  output

            }

        });

Complete Code of Jquery with ajax on JSP Web page

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

    pageEncoding="ISO-8859-1"%>

    <%@page import="java.sql.*" %>   

<%@page import="dal.*" %> 

<!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>Insert title here</title>

<style type="text/css">

table

{

width:800px;

margin-top:10px;

margin-left:20px;

}

table tr th

{

background-color: black;

color:white;

 border:1px solid white ;

 font-weight:bolder;

 font-size:25px;

}

table tr td

{

background-color:orange;

text-align: center;

 border:1px solid black;

}

input[type="text"]

{

   height:30px;

   border:1px solid black;

}

</style>

<script src="https://code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script>

<script>

$(document).ready(function(){

$("#txtsearch").keyup(function(){

$.ajax({

            type: "post",

            url: "searchdata.jsp", //this is my servlet

            data: "q=" +$(this).val(),

            success: function(msg){      

                    $('#res').html(msg);

            }

        });

});

});

</script>

<%

if(session.getAttribute("sessionaid")==null)

{

response.sendRedirect("Login.jsp");

}

%>

</head>

<body>

<a href="viewcustomer.jsp">Home</a>

<a href="../LogoutAdminSer">Logout</a>

<tr><th colspan="7"><input type="text" name="txtsearch" id="txtsearch" placeholder="search here by name"  /></th></tr>

<div id="res">

<table cellpadding="0" cellspacing="0">

<tr><th colspan="7">View Customer Info here</th></tr>

<tr><th>ID</th><th>Username</th><th>Password </th><th>Email</th><th>Mobile</th><th>EDIT|DELETE</th></tr>

<%

JDBCExample2.connect();

ResultSet res= JDBCExample2.showdata();

while(res.next())

{ %>

<tr><td><%= res.getString(1) %></td><td><%= res.getString(2) %></td><td><%= res.getString(3) %></td><td><%= res.getString(4) %></td><td><%= res.getString(5) %></td>

<td><a href="Edit.jsp?q=<%= res.getString(1) %>"><img src="edit.jpg" style="width:30px;height:30px;" /></a> <a href="Delete.jsp?q=<%= res.getString(1) %>"><img src="delete.jpg" style="width:30px;height:30px;" /></a></td>

</tr>

<% 

}

%>

</table>

</div>

</body>

</html>

Code of SearchData.jsp web page:-

    <%@page import="java.sql.*" %>   

<%@page import="dal.*" %> 

<table cellpadding="0" cellspacing="0">

<tr><th colspan="7">View Customer Info here</th></tr>

<tr><th>ID</th><th>Username</th><th>Password </th><th>Email</th><th>Mobile</th><th>EDIT|DELETE</th></tr>

<%

JDBCExample2.connect();

ResultSet res=JDBCExample2.showdata1(request.getParameter("q"));

while(res.next())

{ %>

<tr><td><%= res.getString(1) %></td><td><%= res.getString(2) %></td><td><%= res.getString(3) %></td><td><%= res.getString(4) %></td><td><%= res.getString(5) %></td>

<td><a href="Edit.jsp?q=<%= res.getString(1) %>"><img src="edit.jpg" style="width:30px;height:30px;" /></a> <a href="Delete.jsp?q=<%= res.getString(1) %>"><img src="delete.jpg" style="width:30px;height:30px;" /></a></td>

</tr>

<% 

}

%>

Code of JDBCExample2.java

    public static ResultSet showdata1(String s) throws SQLException
   {
   String search = s+"%";
   ResultSet res = st.executeQuery("select * from tbl_reg where username like '"+search+"'");
   return res;
   }


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