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if(username.equals(username)&&(password.equalsIgnoreCase(password))

<form method="POST" action="j_security_check">
        <table cellpadding="0" cellspasing="0" border="0">
            <tr>
                <td align="right">Username:&nbsp;</td>
                <td>
                    <input type="text" name="j_username">
                </td>
            </tr>
            <tr>
                <td align="right">Password:&nbsp;</td>
                <td>
                    <input type="password" name="j_password">
                </td>
            </tr>
            <tr>
                <td></td>
                <td><input type="submit" value="Login"</td>
            </tr>
        </table>
    </form>

<title>Login Error</title>
</head>
<body>
    There was an error logging in. Please try again.
</body>

<body>
    <h2>Admin Page</h2>
    <p>
        Had this been a real admin page, you would have
 been able to administer the system from here!
    </p>
</body>

String username = request.getParameter("j_username");
    String password = request.getParameter("j_password");
    RequestDispatcher rd = null;

    if (username.equals(username) && password.equalsIgnoreCase(password)) {
        rd = request.getRequestDispatcher("/success.jsp");
        User user = new User(username, password);
        request.setAttribute("user", user);
    } else {
        rd = request.getRequestDispatcher("/error.jsp");
    }
    rd.forward(request, response);
}