java write to file exampe

java_write_to_file_exampe.java

    @RequestMapping(value = "/change/text", method = RequestMethod.POST)
    public OutputMessage changeText(@RequestBody InputMessage msg) {

        String fileName = "/home/a/temp/writtenByJava.txt";

        System.out.println("Writing to file " + fileName);

        writeToFileHelper(fileName, msg.getText());

        return new OutputMessage(msg.getFrom(), msg.getText() + " - this is response!", new Date().toString());
    }

    @RequestMapping("/read/text")
    public String readWrittenText() {

        String text = null;
        try {
            text = new String(Files.readAllBytes(Paths.get(fileName)));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return text;
    }

    public static void writeToFileHelper(String fileName, String text) {

        try (BufferedWriter bw = new BufferedWriter(new FileWriter(fileName))) {

            bw.write(text);

            System.out.println("Done!!!");

        } catch (IOException e) {
            e.printStackTrace();
        }
    }