JSP tags; html formatting problem

Question

Hi,
I've implemented a jsp custom action which supports several enclosed tags in like this:
<%@ taglib ..... prefix="myprefix" %>
<myprefix:myTag ... >
<myprefix:myNestedTag ... />
<myprefix:myNestedTag ... />
</myprefix:myTag>
I have three classes to manage this stuff:
* class MyTag
* class MyNestedTag
* class MyNestedTagParent (interface implemented by the MyTag tag handler) that contains following lines:
=======================================================
public int doEndTag() throws JspException {
Enumeration enum = tabs.elements(); // tabs is a vector of // parameters names and values
try {
     HttpServletResponse res = (HttpServletResponse) pageContext.getResponse();
     JspWriter out = pageContext.getOut();
     out.println("SOME HTML DIRECTIVES"); // shows html formatted page OK
     out.println("<%@ include file=\"page.jsp\"%>"); // shows <%@ include.......
     out.println("<jsp:include page=\"page.jsp\" />"); // shows nothing
     // "View Page Source" shows a correct code, if I do copy/paste into another jsp file and ask it in the browser window, all works as I wish!
=======================================================
The myTag action is supposed to form an html response and send it to the browser. As long as this action sends pure html response (only html tags) things go well, I get a page formatted depending on the myTag and myNestedTag parameters.
However, when I try to send a jsp directive, it is not processed but sent directly to the browser. Namely, I want to include the
<jsp:include page="page.jsp" flush="true" />
in the response and the browser ignores this directive as if it was an unknown HTML tag. If I send
<%@ include file="page.jsp" %>
I see this line as is, not processed.
I can't find a way to avoid this. And I can't find a way to avoid using INCLUDE because the part of the response has to be dynamically processed.
Does anyone have any idea? A way to avoid using JSP directives doesn't seem possible to me, because a part of the response must be generated dynamically with the JSP methods. Anyway, if you have ideas...
Thankfully,
     Nathaniel.

Answer 1

out.println("<%@ include file=\"page.jsp\"%>"); //The jsp page needs to be compiled by the app server, before you send the response back to the client. What this means is that you can't send your jsp page as a response before it's compiled, as you're trying to do. What you can try doing is using the response stream to redirect to the jsp page like this: response.sendRedirect("page.jsp");.
I can't find a way to avoid this. And I can't find a way to avoid >using INCLUDE because the part of the response has to be dynamically >processed.You can create the response dynamically, based on user inout etc. but processing it dynamically soen't make sense. You should process the request from the client, create the response and send the response back to the client.
Regards,
D.