freemarker迭代List

Map map=new HashMap<>();
<#list map?keys as key>
    索引号：${key_index}
<#if key??>
    截取key: ${key?substring(0,1)}
<#if map[key]??>
<#list map[key] as DayProgre>
    ${(DayProgre.editTime)!}





substring(start,end)截取从start索引开始到（end-1）索引之间的字符，截取总长度为（end-start）；

//listRpcSubprojectProgre和subDayProgreList是同一级，需要通过索引迭代
List>> subDayProgreList=new ArrayList<>();
<#if listRpcSubprojectProgre??>
<#list listRpcSubprojectProgre as rpcSubprojectProgre>
    <#list subDayProgreList[rpcSubprojectProgre_index]?keys as key>
    <#if subDayProgreList[rpcSubprojectProgre_index]??>
         截取key：${key?substring(37,47)}
        <#if subDayProgreList[rpcSubprojectProgre_index][key]??>
        <#list subDayProgreList[rpcSubprojectProgre_index][key] as DayProgre>
            工程量：${(DayProgre.enginQuantity)!}