JAvaファイルの読み取りと書き込みの簡単な実現

    /**       */
    private String getTimeLog(String path){
        File file = new File(path.substring(0,path.lastIndexOf("/")));
        String line = null;
        if (!file.exists()){
            file.mkdir();
        }
        try {
            BufferedReader reader = null;
            reader = new BufferedReader(new InputStreamReader(new FileInputStream(path)));
            line = reader.readLine();
            return line;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return line;
    }

    /**          */
    private Boolean writeTimeLog(String path,Long time){
        File file = new File(path.substring(0,path.lastIndexOf("/")));
        if (!file.exists()){
            file.mkdir();
        }
        byte[] buff = String.valueOf(time).getBytes();
        FileOutputStream out;
        try {
            out = new FileOutputStream(path);
            out.write(buff);
            return true;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return false;
    }