Servlet Tutorials
Request and Response
Session Management
Servlet Filter
Servlet Projects

Login & Logout Application using HttpSession

Hi friends, let’s see a login and logout application using HttpSession

Required Files:

  1. index.html
  2. link.html
  3. LoginServlet.java
  4. LogoutServlet.java
  5. ProfileServlet.java
  6. web.xml

First look the following project structure:

servlet-login-1
index.html
<html>
<body>
    <h1>Login Application using HttpSession</h1>
    <a href="login.html">Login</a>
    <a href="LogoutServlet">Logout</a>
    <a href="ProfileServlet">Profile</a>
</body>
</html>
link.html
<html> 
<body> 
    <a href="login.html">Login</a>
    <a href="LogoutServlet">Logout</a>
    <a href="ProfileServlet">Profile</a>
    <hr> 
</body> 
</html>
login.html
<html>
<body>
    <form action="LoginServlet">
        <table>
            <tr>
                <td>UserName</td>
                <td><input type="text" name="uname"></td>
            </tr>
            <tr> 
                <td>Password</td>
                <td><input type="password" name="pass"></td>
            </tr> 
            <tr> 
                <td><input type="submit" value="login"></td>
            </tr> 
        </table>
    </form>
</body>
</html>
LoginServlet.java
package java8s;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class LoginServlet extends HttpServlet { 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter out=response.getWriter();

        request.getRequestDispatcher("link.html").include(request, response);
        String s1=request.getParameter("uname");
        String s2=request.getParameter("pass");
        if (s2.equals("silan"))
        {
            out.print("login is successful");    
            HttpSession session=request.getSession();
            session.setAttribute("user", s1);
        }
        else
        {
            out.print("sry!! invalid password");
            request.getRequestDispatcher("login.html").include(request, response);
        }
    }
}
LogoutServlet.java
package java8s; 
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*; 
public class LogoutServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException { 
        response.setContentType("text/html");
        PrintWriter out=response.getWriter();
        HttpSession session=request.getSession();
        session.invalidate();
        out.print("U have successfully logged out");
    }
}
ProfileServlet.java
package java8s;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class ProfileServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter out=response.getWriter();
        HttpSession session=request.getSession(false);
        if (session!=null)
        {
            String s=(String)session.getAttribute("user");
            out.print("Hii"+s+""+"Welcome  2 SILAN SOFTWARE");
        }
        else
        {
            out.print("sry!!U have to login first");
            request.getRequestDispatcher("login.html").include(request, response);
        } 
    }
}
web.xml
<web-app>
    <display-name>LoginApp</display-name>
    <servlet>
        <servlet-name>abc</servlet-name>
        <servlet-class>java8s.LoginServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>abc</servlet-name> 
        <url-pattern>/LoginServlet</url-pattern>
    </servlet-mapping>

    <servlet>
        <servlet-name>def</servlet-name>
        <servlet-class>java8s.LogoutServlet</servlet-class>
    </servlet>

    <servlet-mapping> 
        <servlet-name>def</servlet-name>
        <url-pattern>/LogoutServlet</url-pattern> 
    </servlet-mapping> 

    <servlet>
        <servlet-name>demo</servlet-name>
        <servlet-class>java8s.ProfileServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>demo</servlet-name> 
        <url-pattern>/ProfileServlet</url-pattern> 
    </servlet-mapping> 

    <welcome-file-list> 
        <welcome-file>index.html</welcome-file> 
    </welcome-file-list>
</web-app>
Output:
servlet-login-2

Now if u click on profile menu, then u will get
servlet-login-3

Without login if u will click on profile menu, then u will get
servlet-login-4

When u will click on logout menu, then u will get
servlet-login-5

About the Author



Silan Software is one of the India's leading provider of offline & online training for Java, Python, AI (Machine Learning, Deep Learning), Data Science, Software Development & many more emerging Technologies.

We provide Academic Training || Industrial Training || Corporate Training || Internship || Java || Python || AI using Python || Data Science etc




 PreviousNext 

Join our newsletter for the latest updates.

About us

    pythontpoints.com : The best online tutorial to learn Python, Machine Learning, Deep Learning, Data Science, Power BI, SQL & Java.
    We Provide best Academic training, Corporate training, Project & Internship.

Our Services

  • Corporate & Academic Training
  • Website Designing
  • Website Development
  • Digital Marketing
  • Project & Thesis
Contact Us

  • Plot No-741, 2nd Floor, Jayadev Vihar, 751013, Bhubaneswar, Odisha
  • Call :
    0674-2361252
  • Mail : info@pythontpoints.com
  • Contact Us
  • Privacy Policy


Our Courses

Learn Python | Learn AI | Learn Machine Learning | Learn Deep Learning | Learn Core Java | Learn Java JSP | Learn Java Servlet | Learn Java Spring | Learn Spring Boot | Learn Power BI | Learn DAA | Learn HTML | Learn SQL | Learn C Programming | Learn Bootstrap | Learn Git | Learn JavaScript | Learn Data Structure Using C | Learn RDBMS | Learn Data Science | Learn PHP


Our Tutorials

Python Tutorial | AI Tutorial | Machine Learning Tutorial | Deep Learning Tutorial | Core Java Tutorial | Java JSP Tutorial | Java Servlet Tutorial | Java Spring Tutorial | Spring Boot Tutorial | Power BI Tutorial | DAA Tutorial | HTML Tutorial | SQL Tutorial | C Programming Tutorial | Bootstrap Tutorial | Git Tutorial | JavaScript Tutorial | Data Structure Using C Tutorial | RDBMS Tutorial | Data Science Tutorial | PHP Tutorial

Copyright © 2023 Pythontpoints Powered by Silan Software Pvt. Ltd. All rights reserved.