Tuesday, May 13, 2014

Evaluate empty or null JSTL c tags

You can use the  or  for this.
 test="${empty var1}">
    var1 is empty or null.

 test="${not empty var1}">
    var1 is NOT empty or null.
or

     test="${empty var1}">
        var1 is empty or null.
    
    
        var1 is NOT empty or null.
    
The ${not empty var1} can also be done by ${!empty var1}.
To learn more about those ${} things (the Expression Language, which is a separate subject from JSTL),check here.

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