Java DateTime.setTimeZone方法代码示例

import net.fortuna.ical4j.model.DateTime; //导入方法依赖的package包/类
/**
 * Return a Date instance that represents the day that a point in
 * time translates into local time given a timezone.
 * @param utcDateTime point in time
 * @param tz timezone The timezone.
 * @return The date.
 */
public static Date normalizeUTCDateTimeToDate(DateTime utcDateTime, TimeZone tz) {
    if(!utcDateTime.isUtc()) {
        throw new IllegalArgumentException("datetime must be utc");
    }
    
    // if no timezone, use default
    if (tz == null) {
        return new Date(utcDateTime);
    }
    
    DateTime copy = (DateTime) Dates.getInstance(utcDateTime, utcDateTime);
    copy.setTimeZone(tz);
    
    try {
        return new Date(copy.toString().substring(0, 8));
    } catch (ParseException e) {
        throw new CosmoParseException("error creating Date instance", e);
    }
}
 

import net.fortuna.ical4j.model.DateTime; //导入方法依赖的package包/类
/**
 * Return a DateTime instance that is normalized according to the
 * offset of the specified timezone as compared to the default
 * system timezone.
 * 
 * @param utcDateTime point in time
 * @param tz timezone The timezone.
 * @return The date.
 */
public static Date normalizeUTCDateTimeToDefaultOffset(DateTime utcDateTime, TimeZone tz) {
    if(!utcDateTime.isUtc()) {
        throw new IllegalArgumentException("datetime must be utc");
    }
    
    // if no timezone nothing to do
    if (tz == null) {
        return utcDateTime;
    }
    
    // create copy, and set timezone
    DateTime copy = (DateTime) Dates.getInstance(utcDateTime, utcDateTime);
    copy.setTimeZone(tz);
    
    
    // Create floating instance of local time, which will give
    // us the correct offset
    try {
        return new DateTime(copy.toString());
    } catch (ParseException e) {
        throw new CosmoParseException("error creating Date instance", e);
    }
}
 

import net.fortuna.ical4j.model.DateTime; //导入方法依赖的package包/类
/**
 * Returns a new date instance matching the type and timezone of the other
 * date. If no type is specified a DateTime instance is returned.
 * 
 * @param date
 *            a seed Java date instance
 * @param type
 *            the type of date instance
 * @return an instance of <code>net.fortuna.ical4j.model.Date</code>
 */
public static Date getInstance(final java.util.Date date, final Date type) {
    if (type instanceof DateTime) {
        DateTime dt = new DateTime(date);
        if (((DateTime) type).isUtc()) {
            dt.setUtc(true);
        } else {
            dt.setTimeZone(((DateTime) type).getTimeZone());
        }
        return dt;
    } else {
        return new Date(date);
    }
}
 

import net.fortuna.ical4j.model.DateTime; //导入方法依赖的package包/类
private NoteItem makeWelcomeItem(OutOfTheBoxContext context) {
    NoteItem item = entityFactory.createNote();
    TimeZone tz= context.getTimezone();
    Locale locale = context.getLocale();
    User user = context.getUser();

    String name = "Welcome to Chandler Server";
    String body = "1. Get a tour of Chandler @ chandlerproject.org/getstarted\n\n2. Consult our FAQ @ chandlerproject.org/faq\n\n3. Read about any known issues with the Preview release @ chandlerproject.org/knownissues\n\n4. Ask questions and give us feedback by joining the Chandler-Users mailing list @ chandlerproject.org/mailinglists. Find out how to get involved @ chandlerproject.org/getinvolved\n\n5. Learn more about the project and access a wide range of design, planning and developer documentation @ chandlerproject.org/wikihome";
    String from = "OSAF";
    String sentBy = "OSAF";
    String to = "";

    item.setUid(contentDao.generateUid());
    item.setDisplayName(name);
    item.setOwner(user);
    item.setClientCreationDate(Calendar.getInstance(tz, locale).getTime());
    item.setClientModifiedDate(item.getClientCreationDate());
    TriageStatus triage = entityFactory.createTriageStatus();
    TriageStatusUtil.initialize(triage);
    item.setTriageStatus(triage);
    item.setLastModifiedBy(user.getUsername());
    item.setLastModification(ContentItem.Action.CREATED);
    item.setSent(Boolean.FALSE);
    item.setNeedsReply(Boolean.FALSE);
    item.setIcalUid(item.getUid());
    item.setBody(body);

    Calendar start = Calendar.getInstance(tz, locale);
    start.set(Calendar.MINUTE, 0);
    start.set(Calendar.SECOND, 0);
    DateTime startDate = (DateTime)
        Dates.getInstance(start.getTime(), Value.DATE_TIME);
    startDate.setTimeZone(vtz(tz.getID()));

    EventStamp es = entityFactory.createEventStamp(item);
    item.addStamp(es);
    es.createCalendar();
    es.setStartDate(startDate);
    es.setDuration(new Dur(0, 1, 0, 0));

    TaskStamp ts = entityFactory.createTaskStamp();
    item.addStamp(ts);

    MessageStamp ms = entityFactory.createMessageStamp();
    item.addStamp(ms);
    ms.setFrom(from);
    ms.setTo(to);
    ms.setOriginators(sentBy);
    ms.setDateSent(DateUtil.formatDate(MessageStamp.FORMAT_DATE_SENT,
                                       item.getClientCreationDate()));

    return item;
}
 

import net.fortuna.ical4j.model.DateTime; //导入方法依赖的package包/类
private NoteItem makeTryOutItem(OutOfTheBoxContext context) {
    NoteItem item = entityFactory.createNote();
    TimeZone tz= context.getTimezone();
    Locale locale = context.getLocale();
    User user = context.getUser();

    String name = "Download Chandler Desktop";
    String body = "Learn more @ chandlerproject.org\n\nDownload @ chandlerproject.org/download";

    TriageStatus triage = entityFactory.createTriageStatus();
    TriageStatusUtil.initialize(triage);
    triage.setCode(TriageStatus.CODE_LATER);

    item.setUid(contentDao.generateUid());
    item.setDisplayName(name);
    item.setOwner(user);
    item.setClientCreationDate(Calendar.getInstance(tz, locale).getTime());
    item.setClientModifiedDate(item.getClientCreationDate());
    item.setTriageStatus(triage);
    item.setLastModifiedBy(user.getUsername());
    item.setLastModification(ContentItem.Action.CREATED);
    item.setSent(Boolean.FALSE);
    item.setNeedsReply(Boolean.FALSE);
    item.setIcalUid(item.getUid());
    item.setBody(body);

    Calendar start = Calendar.getInstance(tz, locale);
    start.add(Calendar.DAY_OF_MONTH, 1);
    start.set(Calendar.HOUR_OF_DAY, 10);
    start.set(Calendar.MINUTE, 0);
    start.set(Calendar.SECOND, 0);
    DateTime startDate = (DateTime)
        Dates.getInstance(start.getTime(), Value.DATE_TIME);
    startDate.setTimeZone(vtz(tz.getID()));

    EventStamp es = entityFactory.createEventStamp(item);
    item.addStamp(es);
    es.createCalendar();
    es.setStartDate(startDate);
    es.setDuration(new Dur(0, 1, 0, 0));

    TaskStamp ts = entityFactory.createTaskStamp();
    item.addStamp(ts);

    return item;
}