Using SendRedirect() in Java Servlets

How to Redirect User from one page to another in Java

 


ServletsHome

sendRedirect is a method available in HttpServletResponse Interface, allows you to forward the response to another resource. 



Syntax: 
response.sendRedirect("path");
 

A relative URL can be used as a path argument.

 
 
Login.html
 
<html>
  <head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
  <form name="form1" method="post" action="SendRedirect">
    Enter UserName:<input type=textbox name="username" value=""><br>
    Enter Password:<input type=textbox name="password" value=""><br>
    <input type=submit name="Login" ><br>
  </form>
  </body>
</html> 

  • The above form will take the user details and redirects to servlet. 
  • Servlet reads user values and validates the user. If valid, send him
    to Userhome.html which greets with wecome message. 
  • If not validated just shows "Invalid Login Details". 
 
Page1 Output 
 
e-trainings-servlet-login page

 
 
 
 
 

SendRedirect.java


import java.io.*;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.*;

public class SendRedirect extends javax.servlet.http.HttpServlet{

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {

response.setContentType("text/html");
PrintWriter pw = response.getWriter();
 
String name = request.getParameter("username");
String password = request.getParameter("password");
 
if(name.equals("admin")&& password.equals("admin"))
{
response.sendRedirect("Userhome.html");
}
else
{
pw.println("Invalid Login Details");
}
}
}
 
 
 Userhome.html

<html>
  <head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
  </body>
    <h1> Welcome User!!</h1>
  </body>
</html>

 
 
  
 
Page2 Output:
 
 
 
 
e-trainings-servlet-login-success

 
 
 
 

 

 

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