protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // TODO Auto-generated method stub
  response.setContentType("text/html");
  PrintWriter out= response.getWriter();
  String systemPath=request.getParameter("SYSTEMPATH");
  String deployPath = getServletConfig().getServletContext().getRealPath("/WEB-INF/DB.properties");
  InputStream stream = getServletContext().getResourceAsStream("/WEB-INF/DB.properties");
  Properties prop = new Properties();
  prop.load(stream);
  prop.setProperty("Workspace", systemPath);
  File file = new File(deployPath);
  FileOutputStream fileOut = new FileOutputStream(file);
  prop.store(fileOut, "sample properties");
  fileOut.close();
}

// load to store prop
  @SuppressWarnings ( "resource" )
  PrintWriter pw = new PrintWriter( configFile );
  pw.println( "#" + LocalDateTime.now() );
  pw.println( "hibernate.connection.username=" +  prop.getProperty( "hibernate.connection.username" ) );
  pw.println( "hibernate.connection.password=" + prop.getProperty( "hibernate.connection.password" ) );
  pw.println( "hibernate.connection.url=" + prop.getProperty( "hibernate.connection.url" ) );
  pw.close();