在freemarker标签中创建一个自增字段并且遍历一个List映射map荟萃

<#if downLoadAttachmentUrls?? && (downLoadAttachmentUrls?size > 0)>
    <#assign index = 0 >
    <#list downLoadAttachmentUrls  as urlMap >

        <#list urlMap?keys as itemKey>
            <#assign index = index+1>     //使index循环加一
      ${urlMap[itemKey]}