java.time.ZoneId.systemDefault()方法的使用及代码示例

x33g5p2x  于2022-02-05 转载在 其他  
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本文整理了Java中java.time.ZoneId.systemDefault()方法的一些代码示例，展示了ZoneId.systemDefault()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ZoneId.systemDefault()方法的具体详情如下：
包路径：java.time.ZoneId
类名称：ZoneId
方法名：systemDefault

ZoneId.systemDefault介绍

[英]Gets the system default time-zone.

This queries TimeZone#getDefault() to find the default time-zone and converts it to a ZoneId. If the system default time-zone is changed, then the result of this method will also change.
[中]获取系统默认时区。
查询时区#getDefault（）以查找默认时区并将其转换为ZoneId。如果更改了系统默认时区，则此方法的结果也将更改。

代码示例

代码示例来源：origin: lets-blade/blade

/**
 * format string time to unix time
 *
 * @param time    string date
 * @param pattern date format pattern
 * @return return unix time
 */
public static int toUnix(String time, String pattern) {
  LocalDateTime formatted = LocalDateTime.parse(time, DateTimeFormatter.ofPattern(pattern));
  return (int) formatted.atZone(ZoneId.systemDefault()).toInstant().getEpochSecond();
}

代码示例来源：origin: oblac/jodd

/**
 * Converts local date to Date.
 */
public static Date toDate(final LocalDate localDate) {
  return Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant());
}
/**

代码示例来源：origin: lets-blade/blade

public static String gmtDate(Date date) {
  return GMT_FMT.format(LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()).atZone(GMT_ZONE_ID));
}

代码示例来源：origin: lets-blade/blade

public Date format(String date, String pattern) {
  DateTimeFormatter fmt       = DateTimeFormatter.ofPattern(pattern, Locale.US);
  LocalDateTime     formatted = LocalDateTime.parse(date, fmt);
  Instant           instant   = formatted.atZone(ZoneId.systemDefault()).toInstant();
  return Date.from(instant);
}

代码示例来源：origin: SonarSource/sonarqube

/**
 * Return a date at the start of day.
 *
 * @param s string in format {@link #DATE_FORMAT}
 * @throws SonarException when string cannot be parsed
 */
public static Date parseDate(String s) {
 return Date.from(parseLocalDate(s).atStartOfDay(ZoneId.systemDefault()).toInstant());
}

代码示例来源：origin: lets-blade/blade

public static String gmtDate(Date date) {
  return GMT_FMT.format(LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()).atZone(GMT_ZONE_ID));
}

代码示例来源：origin: lets-blade/blade

public Date format(String date, String pattern) {
  DateTimeFormatter fmt       = DateTimeFormatter.ofPattern(pattern, Locale.US);
  LocalDateTime     formatted = LocalDateTime.parse(date, fmt);
  Instant           instant   = formatted.atZone(ZoneId.systemDefault()).toInstant();
  return Date.from(instant);
}

代码示例来源：origin: SonarSource/sonarqube

@CheckForNull
private static Instant parseDate(String propertyValue) {
 try {
  LocalDate localDate = LocalDate.parse(propertyValue);
  return localDate.atStartOfDay(ZoneId.systemDefault()).toInstant();
 } catch (DateTimeParseException e) {
  boolean invalidDate = e.getCause() == null || e.getCause() == e || !e.getCause().getMessage().contains("Invalid date");
  checkPeriodProperty(invalidDate, propertyValue, "Invalid date");
  return null;
 }
}

代码示例来源：origin: spring-projects/spring-loaded

public static String run() {
  LocalDateTime time = LocalDateTime.now();
  ZonedDateTime zdt = time.atZone(ZoneId.systemDefault());
  return zdt.toString();
}

代码示例来源：origin: lets-blade/blade

/**
 * format string time to unix time
 *
 * @param time    string date
 * @param pattern date format pattern
 * @return return unix time
 */
public static int toUnix(String time, String pattern) {
  LocalDateTime formatted = LocalDateTime.parse(time, DateTimeFormatter.ofPattern(pattern));
  return (int) formatted.atZone(ZoneId.systemDefault()).toInstant().getEpochSecond();
}

代码示例来源：origin: knowm/XChange

private static void raw(Exchange bfx) throws IOException {

  /*
  BitfinexTradeServiceRaw tradeService = (BitfinexTradeServiceRaw) bfx.getTradeService();
  LimitOrder limitOrder = new LimitOrder.Builder(OrderType.BID, CurrencyPair.BTC_USD).limitPrice(new BigDecimal("481.69"))
    .originalAmount(new BigDecimal("0.001")).build();
  tradeService.placeBitfinexLimitOrder(limitOrder, BitfinexOrderType.LIMIT);
  */

  BitfinexTradeServiceRaw tradeService = (BitfinexTradeServiceRaw) bfx.getTradeService();

  Date tenDaysAgo =
    Date.from(LocalDate.now().minusDays(10).atStartOfDay(ZoneId.systemDefault()).toInstant());
  BitfinexFundingTradeResponse[] fundingTradeResponses =
    tradeService.getBitfinexFundingHistory("USD", tenDaysAgo, 2000);
 }
}

代码示例来源：origin: stackoverflow.com

import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Date;

public class DateUtils {

 public static Date asDate(LocalDate localDate) {
  return Date.from(localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant());
 }

 public static Date asDate(LocalDateTime localDateTime) {
  return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
 }

 public static LocalDate asLocalDate(Date date) {
  return Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDate();
 }

 public static LocalDateTime asLocalDateTime(Date date) {
  return Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDateTime();
 }
}

代码示例来源：origin: oblac/jodd

/**
 * Converts local date time to epoh milliseconds.
 */
public static long toMilliseconds(final LocalDateTime localDateTime) {
  return localDateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
}

代码示例来源：origin: SonarSource/sonarqube

/**
 * Warning: may rely on default timezone!
 *
 * @return the datetime, {@code null} if stringDate is null
 * @throws IllegalArgumentException if stringDate is not a correctly formed date or datetime
 * @since 6.1
 */
@CheckForNull
public static Date parseDateOrDateTime(@Nullable String stringDate) {
 if (stringDate == null) {
  return null;
 }
 OffsetDateTime odt = parseOffsetDateTimeQuietly(stringDate);
 if (odt != null) {
  return Date.from(odt.toInstant());
 }
 LocalDate ld = parseLocalDateQuietly(stringDate);
 checkArgument(ld != null, "Date '%s' cannot be parsed as either a date or date+time", stringDate);
 return Date.from(ld.atStartOfDay(ZoneId.systemDefault()).toInstant());
}

代码示例来源：origin: scouter-project/scouter

private void setTimeAsYmd() {
  ZoneId zoneId = ZoneId.systemDefault();
  DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMddHHmm");
  LocalDateTime startDateTime = LocalDateTime.parse(startYmdHm, formatter);
  LocalDateTime endDateTime = LocalDateTime.parse(endYmdHm, formatter);
  startTimeMillis = startDateTime.atZone(zoneId).toEpochSecond() * 1000L;
  endTimeMillis = endDateTime.atZone(zoneId).toEpochSecond() * 1000L;
}

代码示例来源：origin: oblac/jodd

/**
 * Converts local date time to Date.
 */
public static Date toDate(final LocalDateTime localDateTime) {
  return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
}

代码示例来源：origin: Graylog2/graylog2-server

final Date date;
if (value instanceof ZonedDateTime) {
  date = Date.from(((ZonedDateTime) value).toInstant());
} else if (value instanceof OffsetDateTime) {
  date = Date.from(((OffsetDateTime) value).toInstant());
} else if (value instanceof LocalDateTime) {
  final LocalDateTime localDateTime = (LocalDateTime) value;
  final ZoneId defaultZoneId = ZoneId.systemDefault();
  final ZoneOffset offset = defaultZoneId.getRules().getOffset(localDateTime);
  date = Date.from(localDateTime.toInstant(offset));
  final LocalDate localDate = (LocalDate) value;
  final LocalDateTime localDateTime = localDate.atStartOfDay();
  final ZoneId defaultZoneId = ZoneId.systemDefault();
  final ZoneOffset offset = defaultZoneId.getRules().getOffset(localDateTime);
  date = Date.from(localDateTime.toInstant(offset));

代码示例来源：origin: scouter-project/scouter

private void setTimeAsYmd() {
    ZoneId zoneId = ZoneId.systemDefault();
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMddHH");
    LocalDateTime startDateTime = LocalDateTime.parse(startYmd, formatter);
    LocalDateTime endDateTime = LocalDateTime.parse(endYmd, formatter);

    startYmdH = startDateTime.atZone(zoneId).toEpochSecond() * 1000L;
    endYmdH = endDateTime.atZone(zoneId).toEpochSecond() * 1000L;
  }
}

代码示例来源：origin: lets-blade/blade

public static Date toDateTime(String time, String pattern) {
  LocalDateTime formatted = LocalDateTime.parse(time, DateTimeFormatter.ofPattern(pattern));
  return Date.from(formatted.atZone(ZoneId.systemDefault()).toInstant());
}

代码示例来源：origin: hibernate/hibernate-orm

: ZoneId.systemDefault();
_airFrance.setName( "Paris-Amsterdam" );
_airFrance.setDuration( Long.valueOf( 10 ) );
_airFrance.setDepartureDate( Date.from(LocalDate.of( 2005, 06, 21 ).atStartOfDay(zoneId).toInstant()) );
_airFrance.setAlternativeDepartureDate( new GregorianCalendar( 2006, 02, 03, 10, 00 ) );
_airFrance.getAlternativeDepartureDate().setTimeZone( TimeZone.getTimeZone( "GMT" ) );
assertNotNull( copyAirFrance );
assertEquals(
    Date.from(LocalDate.of( 2005, 06, 21 ).atStartOfDay(zoneId).toInstant()),
    copyAirFrance.getDepartureDate()
);

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