jsp:include question

[Amit Hetawal]

Hello ,

In include1.jsp i have

  
<%! int y=4; %>    

In include2.jsp :

     
<% int x=1; %>  
<jsp:include page="include1.jsp" />
<%= y%> 
 

And i try to invoke include2.jsp.
But it throws me exception :
Unable to compile class for JSP:
y cannot be resolved

So my question is there any way i can access the value of y in my include2.jsp.

Please advise,

[Aaron Raja]

try
<@ include file="include1.jsp" />
It should work because

translation vs runtime !!!

Runtime ---> <jsp:include page="include1.jsp" />
Translation ---> <@ include file="include1.jsp" />

Try and let us know
Thanks
AR

[Amit Hetawal]

Hello,
Thanks for the reply
Yes i know it works with include directive.
But was trying with jsp:include action.
Just wanted to know if there is any way i can access that variable in include1.jsp ?

[Aaron Raja]

you have to pass paramater!

Here is simple example which pass String just modify and try and let us know.


header.jsp
========

This is my Header page.




<em><strong>${param.subTitle}</strong></em>



mainPage.jsp
=========
<jsp:include page="header.jsp">
<jsp:param name="subTitle"
value="We have taken the string out of SOAP" />
</jsp:include>

Thanks
AR

[Amit Hetawal]

Hi Aaron,
I still dont get it.
I have to access the variable "y" in my include2.jsp.
And this variable is defined in include1.jsp.
So if do an include for include1.jsp, where and how i pass the parameters.
Can you show me an example with my scenario.

Thanks,

[Aaron Raja]

include1.jsp
==============


I am in include1.jsp


Parameter y which is coming from include2.jsp
<em><strong>${param.y}</strong></em>


include2.jsp
============
<jsp:include page="include1.jsp">
<jsp:param name="y" value= 4 />
</jsp:include>

This should work! keep us posted!
Thanks
AR

[Amit Hetawal]

Hi Aaron,
You misunderstood my question.

Suppose I am in include2.jsp

which looks like :

 <% int x=1; %>    
<jsp:include page="include1.jsp" />  
<%= y%>   

NOTE: Here y is not defined.

and my include1.jsp has y defined in it as:

  <%! int y=4; %>   

So now can i get value of y from include1.jsp, when i invoke include2.jsp ?
Hope my question makes sense now

[Ankit Garg]

Amit the thing you are talking about is not possible I think. The jsp:include dag use a sort of method call approach to include the output of the included page into the output sent to the client. It is like doing this

void methodInclude() {
   int y = 10;
}
void methodCaller() {
   methodInclude();
   System.out.println(y);//what is y??
}

So the only solution to this is to use include directive as it copies the code of the included page into the caller page...

[gurneeraj singh]

Ankit is right. Why not you try to read generated servlet codes it will give you better understanding.

[Amit Hetawal]

Thanks a lot.
That clears everything !