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Stevn
Asked: 2020-05-17 12:37:43 +0800 CST 2020-05-17 12:37:43 +0800 CST

Two conditions in <c:if>

  • 772

I want to add two conditions to an if in , but it throws me an error. 

<c:if test="${ISAJAX == 0 && ${ISDATE == 0}">

Compilation of JSP File '/WEB-INF/pages/index.jsp' failed:

homeafiliado.jsp:792:61: Syntax error in expression. Encountered "{".

I remain attentive, Greetings.

java

2 Answers

  1. Best Answer

    Expression Language (EL, the content inside ${}) is used to parse expressions and convert them into Java code. You don't need to embed EL inside EL. Your expression can be corrected by removing the ${}inner.

    It should be like this:

    <c:if test="${ISAJAX == 0 && ISDATE == 0}">

    You can even rewrite it in an easier to understand way:

    <c:if test="${ISAJAX eq 0 and ISDATE eq 0}">
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  2. The UEL processor only processes what is inside a construct ${...}.

    Solution: The entire expression must be inside the braces.

    <c:if test="${ISAJAX == 0 && ISDATE ==0}"/> <!-- CORRECTO -->

    It even prevents whitespace from being left outside the curly braces,

    <c:if test="${ISAJAX == 0 && ISDATE ==0} "/> <!-- Error, porque a test se le asignará "false " o "true " (espacio en blanco al final)-->

    because as long "true "as they "false "are converted to false( https://ideone.com/bHX49T )

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