Session-exp.jsp
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<p align="center"><%if(request.getParameter("msg")!=null){out.print(request.getParameter("msg"));}%></p>
<form action="validate.jsp" method="post">
Name<input type="text" name="userid"/><br>
Password<input type="password" name="pass"/><br>
<input type="submit" name="submit" value="login"/>
</form>
<h1>Hello World!</h1>
</body>
</html>
home.jsp
<%
String user=(String)session.getAttribute("user");
if(user==null){
response.sendRedirect("session-exp.jsp?msg=Invalid session");
}
%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<p><a href="logout.jsp">Logout</a><p>
<h1>Welocome: <%=user%></h1>
</body>
</html>
validate.jsp
<%
String userid=request.getParameter("userid");
String pass=request.getParameter("pass");
if(userid.equals("aman") && pass.equals("kumar")){
session.setAttribute("user", userid);
response.sendRedirect("home.jsp");
} else{
response.sendRedirect("session-exp.jsp?msg=Invalid username or password.");
}
%>
logout.jsp
<%
session.invalidate();
response.sendRedirect("session-exp.jsp?msg=Logout successfully");
%>
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