public static String localDateTimeToString(final LocalDateTime localDateTime) {
        return DATE_TIME_FORMATTER.format(localDateTime);
    }
Format local date time to string.
use default pattern yyyy-MM-dd HH:mm:ss

@param localDateTime the localDateTime
@return the format string
shenyu-common/src/main/java/org/apache/shenyu/common/utils/DateUtils.java