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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | <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”
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | <% 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"); } %> |
