@CrossOrigin
    @RequestMapping(value = "/fileRead", method = RequestMethod.GET)
    public @ResponseBody String fileRead() throws Exception {

        File file = new ClassPathResource("countries.txt").getFile();

        FileInputStream fis = null;

        try {
            fis = new FileInputStream(file);
            System.out.println(file.getAbsolutePath());
            System.out.println(file.getPath());
            System.out.println("Total file size to read (in bytes) : "  + fis.available());

            int content;
            while ((content = fis.read()) != -1) {
                // convert to char and display it
                System.out.print((char) content);
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (fis != null)
                    fis.close();
            } catch (IOException ex) {
                ex.printStackTrace();
                return ex.getMessage();
            }

        }

        return "done";

    }

    @CrossOrigin
    @RequestMapping(value = "/fileWrite", method = RequestMethod.GET)
    public @ResponseBody String fileWrite() throws Exception {


        try {

            String content = "This is the content to write into file";

            File file = new ClassPathResource("countries.txt").getFile();


            if (!file.exists()) {
                file.createNewFile();
            }

            FileWriter fw = new FileWriter(file.getAbsoluteFile());
            BufferedWriter bw = new BufferedWriter(fw);
            bw.write(content);
            bw.close();

            return "done";

        } catch (IOException e) {
            return e.getMessage();
        }

    }
}