iv class="col-sm-8">
                            <div class="input-group">
                                <input name="email" class="form-control email" type="text" maxlength="50" placeholder="请输入邮箱" th:field="*{email}">
                                <span class="input-group-addon"><i class="fa fa-envelope"></i></span>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div class="row">
             