sendRedirect in JSP
In this tutorial we will discuss about sendRedirect in JSP. This method is used to redirect the user to some other location it may be different server or different context. This is done by the help using browser which transfer the request. The request is visible as a new request. This transfer is done by web container internally in which browser is not involved.
SendRedirect (): This method is declared in
HttpServletResponse Interface.
Signature : void sendRedirect(String url)
The transfer is done by web container. While forwarding, it send a header back to the browser. The header contain resource URL to be redirected by the browser. Then the browser start a new connection.
Example : Using this example we will help you to understand the concept more easily, so what we are doing is, we have created one JSP page named "SendredirectDemo.jsp" in which one text box we have created and when you enter your name in that textbox then, it will redirect you to "welcom.jsp". Using the response.sendredirect() method.
Code for "SendredirectDemo.jsp"<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="java.net.URL,java.util.*"%>
<!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>JSP sendRedirect</title>
</head>
<body bgcolor="#C0C0C0">
<form>
<p>Enter name :
<input type="text" name="name" />
Enter password :
<input type="password" name="pwd" />
<input type="submit" value="submit" /></p>
</form>
<%
String username = request.getParameter("name");
String password = request.getParameter("pwd");
if ((username != null)||(password!=null))
{
request.setAttribute("name", username);
request.setAttribute("pwd",password);
if((username.equalsIgnoreCase("RoseIndia"))&&(password.equalsIgnoreCase("RoseIndia")))
{
response.sendRedirect("Welcome.jsp");
out.println("hello"+username);
out.println("welcome"+password);
} else
{
out.println("Hey "+ request.getAttribute("username")+ ", Sorry you cant be redirected<br>");
}
}
%>
</body>
</html>
Code for "Welcome.jsp"
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" 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>Welcome</title> </head> <body> <h3>Success.</h3> <h4>Welcome to Rose India</h4> </body> </html>
When you execute this program then the output will be as follows:
After providing correct username and password, this page will redirect you to "Welcome.jsp".
When you enter wrong input then the output is as follows:
