Convert date string to LocalDateTime

If you directly use LocalDateTime.parse to convert the date string (yyyy-MM-dd) to LocalDateTime, it will cause an error, so I provide a method to convert the date string to LocalDateTime for reference only. If there is a better way, you are welcome to share.

public static final String DATE_FORMAT = "yyyy-MM-dd";
public static LocalDateTime parserString2LocalDateTime(final String dateTime, final String formatter) {

        if (StringUtils.isBlank(dateTime) || IBusinessEntity.NULL_VALUE.equalsIgnoreCase(dateTime)) {
            return null;
        }
        if(dateTime.length() == 10){
            return convertDate2LocalDateTime(convertLocalDate2Date(parserString2LocalDate(dateTime)));
        }
        return LocalDateTime.parse(dateTime, DateTimeFormatter.ofPattern(formatter));
 }

public static LocalDate parserString2LocalDate(final String date) {

        return parserString2LocalDate(date, DATE_FORMAT);
 }

public static LocalDateTime convertDate2LocalDateTime(Date date) {

        Instant instant = date.toInstant();
        ZoneId zone = ZoneId.systemDefault();
        LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone);
        return localDateTime;
 }