To access the index value of struts iterator in scriptlet array index

Question

Using Struts2, I have a comma separated String of my images captions. While iterating the images to render on JSP I need to display caption along with specific images and could not get any specific tag to split caption String over delimiter and to access specific caption. I am trying the below code and don't know what to use in place of something to get the current iteration index in iterator.

<s:iterator value="images" status="incr">  
  <%= ((String)request.getAttribute("imageCaptionsString")).split(",")[something]%>
</s:iterator>

I know that using scriptlets and expression tags in JSP are not recommended, but I don't have any idea how to avoid it.

Yes you are right about scriptlets, but what do you mean by "expression tags"? — Roman C, Nov 08 '13 at 10:41
expression tags to evaluate and display the expressions <%= %> — , Nov 08 '13 at 10:54

Roman C · Accepted Answer · 2021-08-20T09:53:12.323

11

The current iteration index is available via the status attribute of the <s:iterator> tag. In your case is #incr.index. If you want to display that index

<s:iterator value="images" status="incr"> 
  <s:property value="%{#incr.index}"/>

then scriplet could be changed to OGNL expression

<s:property value='#attr.imageCaptionsString.split(",")[%{#incr.index}]'/>

edited Aug 20 '21 at 09:53

answered Nov 08 '13 at 11:26

Roman C

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No Luck ! It is not displaying anything without any error. What is attr here ? – Nov 08 '13 at 11:30
value="#attr.imageCaptionsString" is giving me the entire caption String but split method don't work. Any suggestion/idea?? – Nov 08 '13 at 11:46
I have made update to the expression, could you check if it works? – Roman C Nov 08 '13 at 12:00

score 1 · Answer 2 · answered Nov 09 '13 at 05:01

After struggling a lot and with the help of answer suggested by Mr. Roman C, I got the solution and keeping here for sake of any future needy user.

<s:iterator value="images" status="incrementer">
  <s:set var="cnt" value="%{#incrementer.index}" />
  <s:property value="#attr.imgCaptions.get(#cnt)"/>
</s:iterator>

This way I got the captions. Thanks to Mr. Roman C.

score 0 · Answer 3 · answered Nov 08 '13 at 11:38

This should do

<s:iterator value="imageCaptionsString.split(",")">  
    <s:property/>
</s:iterator>

If that doesn't work, then might be because it's a request attribute & hence, not available directly on valueStack, in which case you can use #attr.imageCaptionsString instead of plain imageCaptionsString in the iterator.

To access the index value of struts iterator in scriptlet array index

3 Answers3

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