How to traverse the outermost hash table in freemarker FTL

Question

The map in JAVA CODE

Map dataMap = new HashMap();
dataMap.("key1","value1");
dataMap.("key2","value2");
dataMap.("key3","value3");
dataMap.("key4","value4");

and freemarker

template.process(dataMap, out);

In the FTL

<#list dataMap.keySet() as k>
  <span>${k}:</span><span>dataMap[k]</span>
</#list>

I got the error: freemarker.core.InvalidReferenceException: Expression dataMapis undefined

So how can I get the value of "key1","key2","key3" and "value1","value2","value3" in the FTL? I tried to use "rootMap",".main",".vars" to replace "dataMap".All invalid.

Answer 1

You can use the .dataModel special variable like this:

<#list .data_model?keys as prop>
    ${prop} - ${.data_model[prop]}
</#list>

See the freemarker documentation.