Thymeleaf 嵌套循環

 <label th:each="role:${roles}" class="check-box">
   <input th:each="item:${sysAdmin.roles}"  th:checked="${item.roleId == role.roleId}" name="role" 
type="checkbox" th:value="${role.roleId}" th:text="${role.roleName}" th:disabled="${role.dataFlag == '1'}">
</label>