Thymeleaf顯示Map集合數據

<select class="form-control zz-set-input-size" id="channel">
<option value="">請選擇</option>
<option th:each="channel，index:${allChannels}"  th:value="${channel.key}"  th:text="${channel.value}"></option>
</select>

map的兩個屬性：key和value