Simple EL code is not working

Hi All

I am trying to write EL program. Could any of you please help me to get the output? I am expecting the value zero to be displayed. Do I need to import any jars?

<html>
<body>

Integer Testing
<%! int a = 0; %>

Value of a: ${a}
</body>
</html>

Result
Integer Testing

Value of a:

The EL knows nothing of scripting variables. The EL works with scoped variables.

This is not surprising as the JSTL and EL is mean to supplant the use of scripting in JSPs. not to work with it.

ok. Thank you.

Hi all

Again one more question/doubt.

I am trying to write a EL program wiht arithmetic expression.

<HTML>
<HEAD>
<TITLE>EL Testing</TITLE>
</HEAD>
<BODY>
<H3>Fill-out-form</H3>

The A is: ${param.A}

The B is: ${param.B}

Integer Testing

The Sum is: ${param.B} + ${param.A}
</BODY>
</HTML>

Result:

The A is: 2

The B is: 3

Integer Testing

The Sum is: 3 + 2

After updating the integers in the text boxes once i click submit button, i am getting the above result.

I understand that A & B are string variables , getting concatenated. How to do summation with EL. Can any one of you help me on this?

The Sum is: ${param.B} + ${param.A}

How could it possibly know that these are suppoed to be related? They are two entirely separate expressions, each to be evaluated separately.

Think for a moment -- how could you tell the JSP translator that this is intended to be a single expression?

hey.. i got

The Sum is: ${param.B + param.A}

Thank you...

Can you please provide me some link where i can find EL related materials and JSTL.. i have some but not that much informative....

Sangeetha Raja wrote:Can you please provide me some link

www.google.com

Thanks

Links to the specs can be found in the FAQ.

Thank you!!!

I am trying to access java bean from Jsp with EL.

In ELTest1.html; I am getting 2 values

I have Person.java with 2 attributes String name; private Dog dName; (along with getter, setter) Also Dog.java with attribute String dogName; (along with getter, setter)

Person.java

In Servlet, ELTest1Servlet I am assigning the values to bean and forwarding to JSP;

In Jsp, ELTest.jsp: I am trying to display the bean values...

I am getting the error,
[2/5/09 22:50:29:920 EST] 00000028 ServletWrappe E SRVE0068E: Could not invoke the service() method on servlet /ELTest.jsp. Exception thrown : javax.servlet.ServletException: Unable to find a value for "dName" in object of class "foo.Person" using operator "."[/b][/b]

Anything wrong in my code? Pleae anyone of you help me to fix this.

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Thank you. I updated.

Hello Sangeetha,
Can you please show us your complete servlet? and both java bean classes?

Duplication of above post.
Please delete this. Shouldn't we have control over our post atleast?

i updated the java and servlet classes

You should avoid property names which have a capital letter as the second character. I ran into the same problem when I tried to use "eMailAddress" as a property name. Something about the way the JavaBean rules change that into a method name (which I forget the exact problem now).

Not sure but, try putting nullary(no arg) constructor in both beans.This is one of few JavaBean conventions
I guess you use HFSJ. you can also cross check with the code they have provided.

its working if change the Caps to small..

I not yet tried with const....

Thanks a lot..

The no arg constructor is not fixing the issue.

Thanks

Did you change the property names to be more appropriate?

Even without the JavaBean standards, why would you use a name like getDName() instead of getDogName()? There is no need to "freeze dry" names like this. It's needless obfuscation.