1.循环遍历 list
<#list orderDtoPage.content as orderDto>
<tr> <td> ${orderDto.orderId} </td>
</tr>
2.判断 非空
如果是对象的话如下判断
<img src="${(productInfo.productIcon)!''}">
否则
${productIcon!=''}
3.判断存在且相等
<select class="form-control" name="categoryType" id="categoryType" > <#list categoryList as category> <#if (productInfo.categoryType)??&&(productInfo.categoryType)==(category.categoryType) > <option value="${category.categoryId}" selected="selected">${category.categoryName}</option> <#else> <option value="${category.categoryId}" >${category.categoryName}</option> </#if> </#list> </select>