               <span class="mr-2 d-none d-lg-inline text-gray-600 small" th:case="0"
                                      th:text="${user.username + '，您的身份是管理员'}"></span>
                                <span class="mr-2 d-none d-lg-inline text-gray-600 small" th:case="1"
                                      th:text="${user.username + '，您的身份是学生'}"></span>
                                <span class="mr-2 d-none d-lg-inline text-gray-600 small" th:case="2"
                