How to read JSP a file from WEB-INF into a variable for later "printing"

Question

Hello,

I would like to know how is possible to read a file placed in WEB-INF direct into a variable. My intent is to load (and process a page) into a var, than save it to a file and besides that, use the same html result to be displayed (like included) directly into another JSP.

is it possible?

Answer 1

You can hide jsp pages under WEB-INF which can be <jsp:included>.

Do you expect a caching benefit?

Answer 2

You can use a RequestDispatcher.include() method and buffered response. The latter you'll have to write yourself by extending HttpServletResponseWrapper and overriding getWriter() / getOutputStream() methods to return an internal buffer (based on StringWriter, for example). In your servlet, do something like:

MyBufferedResponseWrapper buffer = new MyBufferedResponseWrapper(response); // wrap real response
getServletContext().getRequestDispatcher("path_to_your_jsp").include(request, buffer);
String output = buffer.getOutput();