下面列出了java.util.TimeZone#getDisplayName ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
@Override
public String getDisplayName(TimeZone tz, long date) {
DateTimeZone timeZone = toDateTimeZone(tz);
if (IGNORE_LOCAL_BEFORE_EPOCH) {
if (date < EPOCH) {
date = toFirstDateWithNormalizedTime(timeZone, date);
}
} else if (IGNORE_LOCAL) {
if (date <= LAST_LOCAL_TRANSITION) {
date = toFirstDateWithNormalizedTime(timeZone, date);
}
} else if (IGNORE_LMT) {
if (date <= LAST_LMT_TRANSITION) {
date = toFirstDateAfterLocalMeanTime(timeZone, date);
}
}
String displayName = timeZone.getNameKey(date);
if (displayName != null) {
return displayName;
}
boolean daylightSavings = !timeZone.isStandardOffset(date);
if (!daylightSavings
&& timeZone.getOffset(date) != timeZone.getStandardOffset(System.currentTimeMillis())) {
daylightSavings = timeZone.nextTransition(date) != date;
}
return tz.getDisplayName(daylightSavings, TimeZone.SHORT, Locale.US);
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use {@code TimeZone.LONG} or {@code TimeZone.SHORT}
* @param locale the locale to use
* @return the textual name of the time zone
*/
static String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
TimeZoneDisplayKey key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
String prior = cTimeZoneDisplayCache.putIfAbsent(key, value);
if (prior != null) {
value= prior;
}
}
return value;
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use <code>TimeZone.LONG</code>
* or <code>TimeZone.SHORT</code>
* @param locale the locale to use
* @return the textual name of the time zone
*/
static synchronized String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
Object key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = (String) cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
cTimeZoneDisplayCache.put(key, value);
}
return value;
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use <code>TimeZone.LONG</code>
* or <code>TimeZone.SHORT</code>
* @param locale the locale to use
* @return the textual name of the time zone
*/
static synchronized String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
// xxx :: GARBAGE !!!
Object key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
cTimeZoneDisplayCache.put(key, value);
}
return value;
}
public void test_printText() {
Random r = RandomFactory.getRandom();
int N = 8;
Locale[] locales = Locale.getAvailableLocales();
Set<String> zids = ZoneRulesProvider.getAvailableZoneIds();
ZonedDateTime zdt = ZonedDateTime.now();
//System.out.printf("locale==%d, timezone=%d%n", locales.length, zids.size());
while (N-- > 0) {
zdt = zdt.withDayOfYear(r.nextInt(365) + 1)
.with(ChronoField.SECOND_OF_DAY, r.nextInt(86400));
for (String zid : zids) {
if (zid.equals("ROC") || zid.startsWith("Etc/GMT")) {
continue; // TBD: match jdk behavior?
}
zdt = zdt.withZoneSameLocal(ZoneId.of(zid));
TimeZone tz = TimeZone.getTimeZone(zid);
boolean isDST = tz.inDaylightTime(new Date(zdt.toInstant().toEpochMilli()));
for (Locale locale : locales) {
String longDisplayName = tz.getDisplayName(isDST, TimeZone.LONG, locale);
String shortDisplayName = tz.getDisplayName(isDST, TimeZone.SHORT, locale);
if ((longDisplayName.startsWith("GMT+") && shortDisplayName.startsWith("GMT+"))
|| (longDisplayName.startsWith("GMT-") && shortDisplayName.startsWith("GMT-"))) {
printText(locale, zdt, TextStyle.FULL, tz, tz.getID());
printText(locale, zdt, TextStyle.SHORT, tz, tz.getID());
continue;
}
printText(locale, zdt, TextStyle.FULL, tz,
tz.getDisplayName(isDST, TimeZone.LONG, locale));
printText(locale, zdt, TextStyle.SHORT, tz,
tz.getDisplayName(isDST, TimeZone.SHORT, locale));
}
}
}
}
public static void testTZName( Locale locale, String timezoneName, boolean isDaylight,
int nameType, String expectedName ) throws RuntimeException {
if (!testGeneric) {
//Construct time zone objects
TimeZone zone = TimeZone.getTimeZone(timezoneName);
//Get name from JDK
String name = zone.getDisplayName(isDaylight, nameType, locale);
//Check for equality
if (!name.equals(expectedName))
throw new RuntimeException( "Time zone ("+timezoneName+") name is incorrect for locale: \""+locale.getDisplayName()
+"\" nameType:"+requestedTestType+" DST:"+isDaylight+" Should be: " +expectedName+" Observed: "+name);
}
}
private static void checkTimeZone(String timeZoneID, String expected) {
TimeZone timeZone = TimeZone.getTimeZone(timeZoneID);
String actual = timeZone.getDisplayName();
if (!expected.equals(actual)) {
throw new RuntimeException();
}
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use {@code TimeZone.LONG} or {@code TimeZone.SHORT}
* @param locale the locale to use
* @return the textual name of the time zone
*/
static String getTimeZoneDisplay(final TimeZone tz, final boolean daylight, final int style, final Locale locale) {
final TimeZoneDisplayKey key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
final String prior = cTimeZoneDisplayCache.putIfAbsent(key, value);
if (prior != null) {
value = prior;
}
}
return value;
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use {@code TimeZone.LONG} or {@code TimeZone.SHORT}
* @param locale the locale to use
* @return the textual name of the time zone
*/
static String getTimeZoneDisplay(final TimeZone tz, final boolean daylight, final int style, final Locale locale) {
final TimeZoneDisplayKey key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
final String prior = cTimeZoneDisplayCache.putIfAbsent(key, value);
if (prior != null) {
value = prior;
}
}
return value;
}
/**
* Gets a time zone instance for a JDK TimeZone.
* <p>
* DateTimeZone only accepts a subset of the IDs from TimeZone. The
* excluded IDs are the short three letter form (except UTC). This
* method will attempt to convert between time zones created using the
* short IDs and the full version.
* <p>
* This method is not designed to parse time zones with rules created by
* applications using <code>SimpleTimeZone</code> directly.
*
* @param zone the zone to convert, null means default
* @return the DateTimeZone object for the zone
* @throws IllegalArgumentException if the zone is not recognised
*/
public static DateTimeZone forTimeZone(TimeZone zone) {
if (zone == null) {
return getDefault();
}
final String id = zone.getID();
if (id.equals("UTC")) {
return DateTimeZone.UTC;
}
// Convert from old alias before consulting provider since they may differ.
DateTimeZone dtz = null;
String convId = getConvertedId(id);
if (convId != null) {
dtz = cProvider.getZone(convId);
}
if (dtz == null) {
dtz = cProvider.getZone(id);
}
if (dtz != null) {
return dtz;
}
// Support GMT+/-hh:mm formats
if (convId == null) {
convId = zone.getDisplayName();
if (convId.startsWith("GMT+") || convId.startsWith("GMT-")) {
convId = convId.substring(3);
int offset = parseOffset(convId);
if (offset == 0L) {
return DateTimeZone.UTC;
} else {
convId = printOffset(offset);
return fixedOffsetZone(convId, offset);
}
}
}
throw new IllegalArgumentException("The datetime zone id '" + id + "' is not recognised");
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use <code>TimeZone.LONG</code>
* or <code>TimeZone.SHORT</code>
* @param locale the locale to use
* @return the textual name of the time zone
*/
static synchronized String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
Object key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
cTimeZoneDisplayCache.put(key, value);
}
return value;
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use {@code TimeZone.LONG} or {@code TimeZone.SHORT}
* @param locale the locale to use
* @return the textual name of the time zone
*/
static String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
TimeZoneDisplayKey key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
String prior = cTimeZoneDisplayCache.putIfAbsent(key, value);
if (prior != null) {
value= prior;
}
}
return value;
}
private String getTimezone(int year, int month, int day) {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, month);
calendar.set(Calendar.DAY_OF_MONTH, day);
Date date = calendar.getTime();
TimeZone timezone = TimeZone.getDefault();
boolean inDaylight = timezone.inDaylightTime(date);
return timezone.getDisplayName(inDaylight, TimeZone.SHORT);
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use <code>TimeZone.LONG</code>
* or <code>TimeZone.SHORT</code>
* @param locale the locale to use
* @return the textual name of the time zone
*/
static synchronized String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
Object key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
cTimeZoneDisplayCache.put(key, value);
}
return value;
}
/**
* Gets a time zone instance for a JDK TimeZone.
* <p>
* DateTimeZone only accepts a subset of the IDs from TimeZone. The
* excluded IDs are the short three letter form (except UTC). This
* method will attempt to convert between time zones created using the
* short IDs and the full version.
* <p>
* This method is not designed to parse time zones with rules created by
* applications using <code>SimpleTimeZone</code> directly.
*
* @param zone the zone to convert, null means default
* @return the DateTimeZone object for the zone
* @throws IllegalArgumentException if the zone is not recognised
*/
public static DateTimeZone forTimeZone(TimeZone zone) {
if (zone == null) {
return getDefault();
}
final String id = zone.getID();
if (id.equals("UTC")) {
return DateTimeZone.UTC;
}
// Convert from old alias before consulting provider since they may differ.
DateTimeZone dtz = null;
String convId = getConvertedId(id);
if (convId != null) {
dtz = cProvider.getZone(convId);
}
if (dtz == null) {
dtz = cProvider.getZone(id);
}
if (dtz != null) {
return dtz;
}
// Support GMT+/-hh:mm formats
if (convId == null) {
convId = zone.getDisplayName();
if (convId.startsWith("GMT+") || convId.startsWith("GMT-")) {
convId = convId.substring(3);
int offset = parseOffset(convId);
if (offset == 0L) {
return DateTimeZone.UTC;
} else {
convId = printOffset(offset);
return fixedOffsetZone(convId, offset);
}
}
}
throw new IllegalArgumentException("The datetime zone id '" + id + "' is not recognised");
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use <code>TimeZone.LONG</code>
* or <code>TimeZone.SHORT</code>
* @param locale the locale to use
* @return the textual name of the time zone
*/
static synchronized String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
Object key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = (String) cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
cTimeZoneDisplayCache.put(key, value);
}
return value;
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use <code>TimeZone.LONG</code>
* or <code>TimeZone.SHORT</code>
* @param locale the locale to use
* @return the textual name of the time zone
*/
static synchronized String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
Object key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
cTimeZoneDisplayCache.put(key, value);
}
return value;
}
/**
* <p>Gets the time zone display name, using a cache for performance.</p>
*
* @param tz the zone to query
* @param daylight true if daylight savings
* @param style the style to use <code>TimeZone.LONG</code>
* or <code>TimeZone.SHORT</code>
* @param locale the locale to use
* @return the textual name of the time zone
*/
static synchronized String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
Object key = new TimeZoneDisplayKey(tz, daylight, style, locale);
String value = cTimeZoneDisplayCache.get(key);
if (value == null) {
// This is a very slow call, so cache the results.
value = tz.getDisplayName(daylight, style, locale);
cTimeZoneDisplayCache.put(key, value);
}
return value;
}
@Override
public String getDisplayName(TimeZone tz, long date) {
boolean daylightSavings = tz.inDaylightTime(new Date(date));
if (!daylightSavings && tz.getOffset(date) != tz.getRawOffset()) {
daylightSavings = tz.useDaylightTime();
}
return tz.getDisplayName(daylightSavings, TimeZone.SHORT, Locale.US);
}
/**
* Get the timezone in String
*/
protected String getTimezoneString(DateTimeZone dateTimeZone) {
TimeZone tz = TimeZone.getTimeZone(dateTimeZone.getID());
return tz.getDisplayName(true, 0);
}