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Question

I have implemented the if / else tag in JSTL like following. But its not working. If condition not checking.

<c:choose>
    <core:if ${capital.nextCapital()} eq ${request.capital}>
         <p> Yes. The capital of ${capital.nextState()} is ${capital.nextCapital()} </p>
     </core:if>
    <c:otherwise>
         <p>No. The capital of ${capital.nextState()} is ${capital.nextCapital()} </p>
    </c:otherwise>
</c:choose>

JB Nizet · Accepted Answer · 2014-12-14 09:35:07Z

1

That is not valid syntax at all.

the standard prefix is c, not core
inside c:choose, you can use c:when and c:otherwise. Not c:if.
the boolean condition must be inside a test attribute:
Attributes must be surrounded by quotes:
```
<c:when test="...">
```
The whole boolean EL expression must be inside ${}:
```
<c:when test="${ ... }">
```

So the end result should be

<c:when test="${capital.nextCapital() eq request.capital}"> ... </c:when>

I suggest you re-read your book or tutorial about custom tags and the JSTL.

answered Dec 14, 2014 at 9:35

JB Nizet

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1 Comment

JB Nizet Over a year ago

You need to refine your diagnostic. "not working" doesn't mean anything concrete. What happens? What is printed if you add ${capital.nextCapital()} to know what its value is? And when you add ${request.capital}?

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