java - how to use nested EL in this case? -


i have empid 600 , custid 400 under session object. want apply jstl function on it. want apply project specific taglib function on "600-400"

i tried below

"${myproject:taglib(${sessionscope.empid}-${sessionscope.custid})}"

but getting below error

javax.el.elexception: failed parse expression [${myproject:taglibfunction(${sessionscope.empid]

i know can in 2 separate lines i.e

 <c:set var="intermediatevar" value="${sessionscope.empid}-${sessionscope.custid}" scope="page" />   var finalvalue= "${myproject:taglibfunction(intermediatevar)}";

but there way can in single line ?

when within expression should not have ${} again. try:

edit: types variables empid , custid? type argument taglibfunction? question looks method looking string concatenation of empid (dash) custid. without more details end function/variables guessing here

instead of:

"${myproject:taglibfunction(sessionscope.empid + '-' + sessionscope.custid)}"

try: 

"${myproject:taglibfunction(sessionscope.empid-sessionscope.custid)}"

either way, problem stems nested expressions. ${${}}


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