Saturday 1 April 2017

Login & logout With use of HttpSession

*File Name
        
        1)Web.xml : Welcome file of Servlet.  
        2) index.html: Which is indicate other File With link.
        3)login.html:For Login Name & login Password.
        4)logingServlet:For Create Session.
        5)logoutServlet:for Loutout Session. 
        6)ProfileServlet:See Session ProfileView.


*Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <servlet>
        <servlet-name>loginServlet</servlet-name>
        <servlet-class>loginServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>loginServlet</servlet-name>
        <url-pattern>/loginServlet</url-pattern>
    </servlet-mapping>
    <servlet>
        <servlet-name>logoutServlet</servlet-name>
        <servlet-class>logoutServlet</servlet-class>
           
    </servlet>
    <servlet-mapping>
        <servlet-name>logoutServlet</servlet-name>
        <url-pattern>/logoutServlet</url-pattern>
    </servlet-mapping>
     <servlet>
        <servlet-name>ProfileServlet</servlet-name>
        <servlet-class>ProfileServlet</servlet-class>
           
    </servlet>
    <servlet-mapping>
        <servlet-name>ProfileServlet</servlet-name>
        <url-pattern>/ProfileServlet</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
</web-app>


 *index.html

<html>
<body>
        <a href="login.html">Login</a>||
        <a href="logoutServlet">Logout</a>||
        <a href="ProfileServlet">Profile</a>
    </body>
</html> 


*login.html


<html>
<body>
        <form action="loginServlet" method="post">
            Name:<input type="text" name="name"><br>
            password:<input type="password" name="pas"><br>
            <input type="submit">
        </form>
    </body>
</html>


*loginServlet




import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public class loginServlet extends HttpServlet {

 @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException {
      
         res.setContentType("text/html");
        PrintWriter out=res.getWriter();
      
        String Name=req.getParameter("name");
        String password=req.getParameter("pas");
      
      
        req.getRequestDispatcher("index.html").include(req, res);
      
        if(password.equals("ujash"))
        {
            HttpSession session=req.getSession();
            session.setAttribute("Name", Name);
            out.println("<br>Welcome :"+Name);
          
        }
        else
                {
                 out.println("You Have entered Wrong Password");
                }
    }
    
    }


*logoutServlet.java



import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public class logoutServlet extends HttpServlet {
   
   
    public void doGet(HttpServletRequest req,HttpServletResponse res) throws IOException, ServletException
    {
        res.setContentType("text/html");
        PrintWriter out=res.getWriter();
       
        req.getRequestDispatcher("login.html").include(req, res);
       
        HttpSession session=req.getSession();
        session.invalidate();
       
        out.println("<br>You have successfully Logout");
      }
   
} 

*ProfileServlet.java



import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public class ProfileServlet extends HttpServlet {
   
    public void doGet(HttpServletRequest req,HttpServletResponse res) throws IOException, ServletException
    {
       
        res.setContentType("text/html");
        PrintWriter out=res.getWriter();
       
        req.getRequestDispatcher("index.html").include(req, res);
               
       
        HttpSession session=req.getSession(false);
       
        if(session!=null)
        {
            String Name=(String) session.getAttribute("Name");
           
            out.println("<br> Welcome Again :" +Name);
        }
        else
        {
            req.getRequestDispatcher("index.html").include(req, res);
            out.println("<br> Plz Login First");
            req.getRequestDispatcher("login.html").include(req, res);
        }
       
       
    }
   
   
}


*outPut


 
 



 
Happy Coding
Thanks ;)







 
 
 

  
at

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    Nice



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