How to redirect control to jsp if session is expired( Im getting null Pointer Exception )

Question

0.00/5 (No votes)

See more:

I have supposed to do 4 actions: CreateUser, Modify, View and delete. After deleting the user details, once again if click on ModifyUser or ViewUser im getting NullPointer Exception. Can some one please help me by correcting my code.

index.jsp

HTML

<body>
<form>
<a href="NewUser.jsp">New User</a>
<a href="ModifyUser.jsp">Modify User</a>
<a href="ViewUser.jsp">View User</a> 
<a href="DeleteUser.jsp">Delete User</a>

<form>
<body>

Java

ModifyUser(Action class)

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
  User user = new User();
  User user1 = new User();

  HttpSession session = request.getSession(true);

  user.setFirstName(request.getParameter("FirstName"));
  user.setLastName(request.getParameter("LastName"));
  user.setUserId(request.getParameter("UserId"));
  user1.setContactNumber(request.getParameter("ContactNumber"));
  user1.setLandLine(request.getParameter("LandLine"));

  session.setAttribute("modifiedUserInfo",user1);
  response.sendRedirect("EditedDetails.jsp");

  if(session.getAttribute("modifiedUserInfo")==null)
  {
    response.sendRedirect("NoUser.jsp");   
  }
}

[edit]Code block added[/edit]

Posted 11-Jun-13 23:13pm

Shruthi GM

Updated 12-Jun-13 0:12am

Nelek

v3

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)