public static void writeToCSV(List<Map> objectList) {
    String CSV_SEPARATOR = ",";
    try {
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
                new FileOutputStream("results.csv"), "UTF-8"));
        for (Map objectDetails : objectList) {
            StringBuffer oneLine = new StringBuffer();
            Iterator it = objectDetails.values().iterator();

            while (it.hasNext()) {
                Object value = it.next();

                if(value !=null){
                    oneLine.append(value.toString());
                    }

                if (it.hasNext()) {
                    oneLine.append(CSV_SEPARATOR);
                }
            }
            bw.write(oneLine.toString());
            bw.newLine();
        }
        bw.flush();
        bw.close();
    } catch (UnsupportedEncodingException e) {
    } catch (FileNotFoundException e) {
    } catch (IOException e) {
    }
}

Runtime.getRuntime().exec("results.csv");

Runtime.getRuntime().exec("open results.csv");