[nbj2ee] Unable to find ExpressionFactory of type: org.apache.el.ExpressionFactoryImpl.

  • From: "pino" < >
  • To:
  • Subject: [nbj2ee] Unable to find ExpressionFactory of type: org.apache.el.ExpressionFactoryImpl.
  • Date: Sat, 12 Jan 2013 09:47:28 -0500

I am trying to execute the exercise on the book: Java EE 6 development for 
Netbeans 7 on page 102 of the book; but i encountered a problem 
at the line of the code:
<c:if test="${param.displayConditionalText == 'true'}"
var="textDisplayed" scope="session">
I see a red little square with inside a white x; look the image attached  
with this email.
If i put the mouse over the square i see an error message:
"${param.displayConditionalText == 'true'} contains invalid expression(s):
javax.el.ELException: Unable to find ExpressionFactory of type:
org.apache.el.ExpressionFactoryImpl.
The problem will appear if i click on RUN main project F6. the program will 
not work correctly when i type in the browser: 
http://localhost:8080/jstlif/index.jsp?displayConditionalText=='true'
because the page will show me always the same text instead of showing me even 
the text:
This paragraph will only be displayed if the request parameter named 
"displayConditionalText"
has a value of "true".
If i give the parameter true!
Please help me to resolve this problem!




Attachments: 
http://forums.netbeans.org//files/zzzbmp_131.jpg



[nbj2ee] Unable to find ExpressionFactory of type: org.apache.el.ExpressionFactoryImpl.

pino 01/12/2013

[nbj2ee] Re: Unable to find ExpressionFactory of type: org.apache.el.ExpressionFactoryImpl.

John Yeary 01/14/2013

[nbj2ee] Unable to find ExpressionFactory of type: org.apache.el.ExpressionFactoryImpl.

pino 01/14/2013

[nbj2ee] Unable to find ExpressionFactory of type: org.apache.el.ExpressionFactoryImpl.

pino 01/14/2013

[nbj2ee] Re: Unable to find ExpressionFactory of type: org.apache.el.ExpressionFactoryImpl.

John Yeary 01/15/2013

[nbj2ee] Re: Unable to find ExpressionFactory of type: org.apache.el.ExpressionFactoryImpl.

John Yeary 01/15/2013

[nbj2ee] Unable to find ExpressionFactory of type: org.apache.el.ExpressionFactoryImpl.

pino 01/17/2013

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