<body>
    <div class="container">
        <h1>This is secured!</h1>
        <p>
            Hello <b><c:out value="${pageContext.request.remoteUser}"/></b>
        </p>
        <c:url var="logoutUrl" value="/logout"/>
        <form class="form-inline" action="${logoutUrl}" method="post">
            <input type="submit" value="Log out" />
            <input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
        </form>
    </div>
</body>