Reputation: 798
I have created a login page using JSP (account.jsp) if login is successful the servlet redirects to home.jsp if notstays/ redirects to account.jsp.
In case of unsuccessful login I won't s to display an error message. for that I have created a error div that is set to hidden.i.e. style="display:none;"
When ever the login goes wrong I want to change it's display setting to display, ie, `style="display:block;"
I want to do it from servlet. It is possible to that? If yes, how?
Login Form
<div class="col-sm-4">
<h3><STRONG>Login</STRONG></h3>
<div id="login_alert" class="alert alert-danger" style="display:none;">
<a href="#" class="close" data-dismiss="alert" aria-label="close">×</a>
<strong>Unsuccessful!</strong> Invalid Input
</div>
<form role="form" action="login" method="post">
<div class="form-group">
<input type="email" class="form-control" id="email" name="email" placeholder="Enter Email">
</div>
<div class="form-group">
<input type="password" class="form-control" id="pwd" name="pwd" placeholder="Enter Password">
</div>
<div class="checkbox">
<label><input type="checkbox"> Remember me</label>
</div>
<button id ="submit" type="submit" class="btn btn-success">Submit</button>
</form>
</div>
Servlet Code
if(user exists){
HttpSession session = request.getSession();
session.setAttribute("user",user);
session.setAttribute("pwd",pwd);
request.getRequestDispatcher("./home.jsp").forward(request, response);
}else{
//document.getElementById('login_alert').style.display='block';
request.getRequestDispatcher("./account.jsp").forward(request, response);
}
Upvotes: 0
Views: 189
Reputation: 2417
1 - add a request attribute
else{
request.setAttribute("loginFailed",true);
request.getRequestDispatcher("./account.jsp").forward(request, response);
}
2- Use it conditionally in JSP
<div id="login_alert" class="alert alert-danger"
style="display:${loginFailed ? 'block' : 'none'}" >
<a href="#" class="close" data-dismiss="alert" aria-label="close">×</a>
<strong>Unsuccessful!</strong> Invalid Input
</div>
Upvotes: 1