protected String addDateEndPostfix(String dateString) {
        if (TStringUtils.isBlank(dateString)) {
            return null;
        }

        return dateString + " 23:59:59";
    }
When the time is queried, the end time is 23:59:59

@param dateString    the sting date value
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/master/web/common/BaseResult.java