public class Download extends HttpServlet {

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String filePath = request.getParameter("path");
        String fileName = request.getParameter("name");
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        ServletOutputStream out=response.getOutputStream();
        response.addHeader("Content-Disposition","attachment;filename="+fileName);
        File f = new File(getServletContext().getRealPath("/"),filePath+"/"+fileName);
        long len = f.length();
        response.addHeader("Content-Length", String.valueOf(len));
        response.setContentType("application/download");
        FileInputStream fileInputStream = new FileInputStream(f);
        int i;
        while((i=fileInputStream.read())!=-1){
            out.write(i);
        }
        fileInputStream.close();
        out.close();

    }
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

}

request.setAttribute("path", "statements");
    request.setAttribute("name", "92031101.zip");

    request.getRequestDispatcher("/Download").forward(request, response);