问Thymeleaf -获取从循环到动作url的变量

EN

<form method="post" th:action="@{/categories/category}">
    <select name="category">
        <option th:each="category : ${categoriesList}" th:text="${category.name}" th:value="${category.id}"/>
    </select>
    <select name="language">
        <option value="ENGLISH">Angielski</option>
        <option value="GERMAN">Niemiecki</option>
        <option value="FRENCH">Francuski</option>
    </select>
    <input type="submit"/>
</form>

<form method="post" th:action="@{/categories/CATEGORY_ID}">