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How to get string list values in velocity template? foreach loop for 3 lists

Sharath T S

Hi All,

I have 3 String lists(lets say ListA, ListB and ListC) in my java class which maps to velocity template. I need to display the values of the list in a table.

As velocity allows only foreach loop i can get values of only one list. is there a way to get values from all three lists?

If not in foreach loop, how to access the list values through its index?

Any inputs will be much appreciated.

Thanks

Comments

Sharath T S

Hi,

with a little more investigation i found the answer.

from java class, lets say we have following code with populateVelocityParams method

params.put("listA",ListA);
//Map the below java utils List class 
params.put("list",List.class);

then in velocity template,

just call

$listA.get(index);
//"index" here is the list integer index position in ListA

Thanks,

Sharath TS

Ture Hoefner

Velocity does not iterate Lists, as far as I can tell.

Velocity documentation says that it iterates over Vector, Hashtable, or an array (not a List).

In my experience, that is true.

https://velocity.apache.org/engine/1.7/user-guide.html#foreach-loop

https://velocity.apache.org/engine/2.1/user-guide.html#foreach-loop

I tried to make my velocity template iterate over a List and it did nothing. I converted my List to an array and it worked fine.

I know that this thread is really old but other, newer, threads point to it (that's how I found it) and this thread made me think I could iterate over a List. I could not.

I am developing a Confluence plugin, don't know if my pom.xml versions are out of date and some new Velocity engine or Atlassian ingredient changes things but beware: in my case, Velocity does NOT iterate over a List. It will, however iterate just fine over an array.

My template:

#foreach($result in $results)
  <tr><td>${result}</tr></td>
#end

My getter in Java:

public String[] getResults() {
return results;
}

For my first try, using List<String> for my results the template rendered nothing for my List. I went with an array and it works. Decided not to mess with Vector for various reasons.

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