public class CronUtils {    private static final SimpleDateFormat sdf = new SimpleDateFormat("ss mm HH dd MM ? yyyy");    /***     *  功能描述：日期转换cron表达式     * @param date     * @return     */    public static String formatDateByPattern(Date date) {        String formatTimeStr = null;        if (Objects.nonNull(date)) {            formatTimeStr = sdf.format(date);        }        return formatTimeStr;    }    /***     * convert Date to cron, eg "0 07 10 15 1 ? 2016"     * @param date  : 时间点     * @return     */    public static String getCron(Date date) {        return formatDateByPattern(date);    }}