纯百里香
要在纯thymeleaf中执行此操作，需要为表中具有唯一id的每一行创建一个对话框，并打开与要删除的行关联的对话框。
情态动词示例：

<div th:each="row : ${rows}" th:attr="id=${'editModal' + row.id}">
  <div class="modal-body">
    <div class="modal-body">
       You are about to delete: <div th:text="${row.firstname}"/> <div th:text="${row.lastname}"/>

       <form action="#" th:action="@{/delete/{id}" th:object="${row}" method="delete">
          <input type="text" hidden="true" th:field="${row.id}">
       </form>
    </div>

    <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
        <button type="submit" class="btn btn-primary" th:href="@{/delete/{id}(id=${row.id})}" th:method="delete">Remove</button>
    </div>
  </div>
</div>

打开对话框的按钮变成：

<button data-toggle="modal" th:attr="data-target=${'#editModal'+row.id}" data-row="${row}">DEL</button>

使用javascript
如果您可以使用javascript，我建议您只使用thymeleaf创建模式对话框的模板，然后克隆它并动态填充它。
模态示例：

<div class id="editModalTemplate">
  <div class="modal-body">
    <div class="modal-body">
       You are about to delete: <div data-value="firstname"/> <div data-value="lastname"/>

       <form action="#" th:action="@{/delete/_id_}" method="delete">
          <input type="text" hidden="true" name="id">
       </form>
    </div>

    <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
        <button type="submit" class="btn btn-primary" th:href="@{/delete/{id}(id='_id_')}" th:method="delete">Remove</button>
    </div>
  </div>
</div>

删除按钮：

<button class="btn-delete" data-id=${row.id} data-firstname="${row.firstname}" data-lastname="${row.lastname}">DEL</button>

javascript（以jquery实现为例）：

$('.btn-delete').click(function(){
    //clone dialog and remove ids to ensure uniqueness
    var $modal = $('#editModalTemplate').clone().removeAttr('id');

    //apply custom values where needed
    var $btn = $(this);
    var rowId = $btn.attr('data-id');
    var firstname = $btn.attr('data-firstname');
    var lastname = $btn.attr('data-lastname');

    $modal.find('[data-value="firstname"]').text(firstname );
    $modal.find('[data-value="lastname"]').text(lastname );
    $modal.find('[name="id"]').val($btn.attr('data-id'));
    $modal.find('form').attr('action').replace('_id_', rowId);     
    $modal.find('button[type="submit"]').attr('href', $modal.find('button[type="submit"]').attr('href').replace('_id_', rowId);

    //show dialog
    $modal.modal();
});