How to iterate hashmap containing Object and array object, in jsp using jstl

Question

I am not very good in JSTL. I would be glad to get some help.

I have below Map object in my java class:

Map<Integer, Result[]> qrCodeMap = new HashMap<Integer, Result[]>();
Result qrCodeResult[] = null;

...............(some lines of code)

for (int i = 0; i < pageCount; i++) 

{
..............
qrCodeResult = new QRCodeMultiReader().decodeMultiple(binaryBitmap, hintMap);
qrCodeMap.put(new Integer(i + 1), qrCodeResult);
 }

Now my qrCodeMap has Integer and Result[] array object

I add this map object to model in my Spring Controller :

model.addAttribute("qrCodeMap", qrCodeMap);

I want to display qrCodeMap in jsp using jstl. Could you please tell me how I should iterate through qrCodeMap (ie. a Map) in jsp? Below is my incomplete code:

<c:forEach var="qrCode" items="${qrCodeMap}">
For Page ${qrCode.key} , QR Codes : 
<c:forEach items="${qrCode.value}" var="item">
</c:forEach>
</c:forEach>

If it is easier to do through scriplets, then kindly suggest the syntax. Thanks in advance.

Sedat Gokcen · Accepted Answer · 2017-02-08 19:24:49Z

0

<c:forEach var="qrCode" items="${qrCodeMap}">
    For Page: ${qrCode.key} , QR Codes :<br/>
    <c:forEach var="result" items="${qrCode.value}">
        ${result.attr}<br/>
    </c:forEach>
</c:forEach>

Where attr is the attribute you want to show from Result.

answered Feb 8, 2017 at 19:24

Sedat Gokcen

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3 Comments

Pallavi Shetty Over a year ago

Thank you very much @Sedooe. Also, thank you to Stackoverflow for such wonderful website. Success is never achieved alone. There is always someone who helps you. Best Regards.

fantaghirocco Over a year ago

@Pallavi please have a look at: What should I do when someone answers my question?

Pallavi Shetty Over a year ago

Thank you, I did not knew that.

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