Serve Gzipped content with Java Servlets

Question

I was wondering if there was an easy way to serve GZipped content with Java Servlets. I already have the app up and running so the modifications needed should be to

Answer 1

This's what I used while learning about servlets. Maybe not usefully, but working!!! Laid below code into public class GZIPEncodingServlet extends HttpServlet {...}

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    if (req.getHeader("Accept-Encoding").contains("gzip")) {

        // 'try' block need for closing of stream, of course we can use 'close()' method for our 'PrintWriter' too
        try (PrintWriter printWriter = new PrintWriter(new GZIPOutputStream(resp.getOutputStream()))) {

            resp.setHeader("Content-Encoding", "gzip"); // Client must understood what we're sending him
            printWriter.write("Hello world from gzip encoded html"); // What is sending?
        }

    } else {
        resp.getWriter().write("Can't encode html to gzip :(");
    }

}