This tutorial will teach you how to make JSP Login Validation step by step.
Logging into the application
By default, the login credentials for the Admin are as follows:
Username: John
Password: 123
Form Design
index.jsp
<html>
<head>
<title>TODO supply a title</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
</head>
<body>
<div class="container">
<div class="row">
<div>
<form action="login.jsp" method="POST" >
<div class="form-group">
<h2>Login</h2>
</div>
<div class="form-group">
<label>User Name</label>
<input type="text" name="uname" class="form-control">
</div>
<div class="form-group">
<label>Password</label>
<input type="password" name="pass" class="form-control">
</div>
<div class="form-group">
<button type="submit" class="btn btn-success">Submit</button>
</div>
</form>
</div>
</div>
</div>
</body>
</html>
login.jsp
if the user Insert incorrect Username or Password display the Error Message:
“Login Fail”
if the user Insert Username: Admin and Password: 123 display the Success Message:
“Login Success”
<%
String username = request.getParameter("uname");
String pass = request.getParameter("pass");
if(username.equals("John") && pass.equals("123"))
{
out.println("Login Success");
}
else
{
out.println("Login Fail");
}
%>