/**

     * 2018-05-01T00:00:00.000+08:00转2018-05-01 00:00:00

     * @param oldDateStr

     * @return

     * @throws ParseException

     */

    public static String dealDateFormat(String oldDateStr) throws ParseException {

        if(oldDateStr.length()<=10){

             return oldDateStr+" 23:59:59";

        }

        DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");

        Date  date = df.parse(oldDateStr);

        SimpleDateFormat df1 = new SimpleDateFormat ("EEE MMM dd HH:mm:ss Z yyyy", Locale.UK);

        Date date1 =  df1.parse(date.toString());

        DateFormat df2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        return df2.format(date1);

    }

    public static void main(String[] args) throws ParseException {

        System.out.println(dealDateFormat("2018-05-01"));

    }