Extract the jsp page from the code and get the displayed html output as a string

Question

What is the easiest way to render a JSP page and then get the html display content as a string?

Answer 1

Use class methods java.net.URL and java.net.URLConnection or JSTL <c:import/>

Answer 2

Here is this tutorial that explains each step with the code:

http://valotas.com/get-output-of-jsp-or-servlet-response/

This has advantages when the JSP is not reachable at the URL directly.

Answer 3

You must provide your own wrapper for the Writer HttpServletResponse (via the HttpServletResponseWrapper in Filter ), and each time you write to this writer, also save it in StringBuilder .

This is just a sketch of the code, there are a sufficient number of examples, but the main steps are:

• create filter
• wrap PrintWriter so that it saves every entry in the builder
• expand HttpServletResponseWrapper and make it return author wrapper
• create chain.doFilter(request, new HttpServletResponseWrapper(response))