Java LocalDateTime.getNano方法代碼示例

import java.time.LocalDateTime; //導入方法依賴的package包/類
public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType,
                  int features) throws IOException {
    SerializeWriter out = serializer.out;
    if (object == null) {
        out.writeNull();
    } else {
        if (fieldType == null) {
            fieldType = object.getClass();
        }

        if (fieldType == LocalDateTime.class) {
            final int mask = SerializerFeature.UseISO8601DateFormat.getMask();
            LocalDateTime dateTime = (LocalDateTime) object;
            String format = serializer.getDateFormatPattern();

            if (format == null && (features & mask) != 0 || serializer.isEnabled(SerializerFeature.UseISO8601DateFormat)) {
                format = formatter_iso8601_pattern;
            }

            if (dateTime.getNano() == 0 || format != null) {

                if (format == null) {
                    format = JSON.DEFFAULT_DATE_FORMAT;
                }
                write(out, dateTime, format);
            } else if (out.isEnabled(SerializerFeature.WriteDateUseDateFormat)) {
                //使用固定格式轉化時間
                write(out, dateTime, JSON.DEFFAULT_DATE_FORMAT);
            } else {
                out.writeLong(dateTime.atZone(JSON.defaultTimeZone.toZoneId()).toInstant().toEpochMilli());
            }
        } else {
            out.writeString(object.toString());
        }
    }
}
 

import java.time.LocalDateTime; //導入方法依賴的package包/類
public LocalDateTime getTruncatedLocalDateTime(LocalDateTime value){
	if(value == null){
		return null;
	}
	int divideBy = (int) Math.pow(10, TOTAL_NUM_FRACTIONAL_SECONDS - getNumFractionalSeconds());
	if(divideBy < 1){
		throw new RuntimeException("numFractionalSeconds is greater or equal to 9");
	}
	int numNanoSeconds = value.getNano() / divideBy * divideBy;
	return value.withNano(numNanoSeconds);
}
 

import java.time.LocalDateTime; //導入方法依賴的package包/類
/**
 * Obtains an instance of {@code Timestamp} from a {@code LocalDateTime}
 * object, with the same year, month, day of month, hours, minutes,
 * seconds and nanos date-time value as the provided {@code LocalDateTime}.
 * <p>
 * The provided {@code LocalDateTime} is interpreted as the local
 * date-time in the local time zone.
 *
 * @param dateTime a {@code LocalDateTime} to convert
 * @return a {@code Timestamp} object
 * @exception NullPointerException if {@code dateTime} is null.
 * @since 1.8
 */
@SuppressWarnings("deprecation")
public static Timestamp valueOf(LocalDateTime dateTime) {
    return new Timestamp(dateTime.getYear() - 1900,
                         dateTime.getMonthValue() - 1,
                         dateTime.getDayOfMonth(),
                         dateTime.getHour(),
                         dateTime.getMinute(),
                         dateTime.getSecond(),
                         dateTime.getNano());
}
 

import java.time.LocalDateTime; //導入方法依賴的package包/類
/**
 * Obtains an instance defining a transition between two offsets.
 * <p>
 * Applications should normally obtain an instance from {@link ZoneRules}.
 * This factory is only intended for use when creating {@link ZoneRules}.
 *
 * @param transition  the transition date-time at the transition, which never
 *  actually occurs, expressed local to the before offset, not null
 * @param offsetBefore  the offset before the transition, not null
 * @param offsetAfter  the offset at and after the transition, not null
 * @return the transition, not null
 * @throws IllegalArgumentException if {@code offsetBefore} and {@code offsetAfter}
 *         are equal, or {@code transition.getNano()} returns non-zero value
 */
public static ZoneOffsetTransition of(LocalDateTime transition, ZoneOffset offsetBefore, ZoneOffset offsetAfter) {
    Objects.requireNonNull(transition, "transition");
    Objects.requireNonNull(offsetBefore, "offsetBefore");
    Objects.requireNonNull(offsetAfter, "offsetAfter");
    if (offsetBefore.equals(offsetAfter)) {
        throw new IllegalArgumentException("Offsets must not be equal");
    }
    if (transition.getNano() != 0) {
        throw new IllegalArgumentException("Nano-of-second must be zero");
    }
    return new ZoneOffsetTransition(transition, offsetBefore, offsetAfter);
}