I am currently working on a simple web App project with Oracle JDeveloper.
I have and input field where the user can provide its user name. As soon as focus is moved out of it, jquery AJAX method will execute and call the servlet and process the response.
index.jsp
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>jQuery, Ajax and Servlet/JSP integration example</title>
<script src="https://code.jquery.com/jquery-1.10.2.js"
type="text/javascript"></script>
<script src="js/app-ajax.js" type="text/javascript"></script>
</head>
<body>
<form>
Enter Your Name: <input type="text" id="userName" />
</form>
<br>
<br>
<strong>Ajax Response</strong>:
<div id="ajaxGetUserServletResponse"></div>
</body>
</html>
app-ajax.js
$(document).ready(function() {
$('#userName').blur(function() {
$.ajax({
url : 'GetUserServlet',
data : {
userName : $('#userName').val()
},
success : function(responseText) {
$('#ajaxGetUserServletResponse').text(responseText);
}
});
});
});
Then the servlet: GetUserServlet.java
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;
@WebServlet("/GetUserServlet")
public class GetUserServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String userName = request.getParameter("userName").trim();
if(userName == null || "".equals(userName)){
userName = "Guest";
}
String greetings = "Hello " + userName;
response.setContentType("text/plain");
response.getWriter().write(greetings);
}
}
After providing the user name and when the focus is moved out I get the error: 404 Not Found
