Java8中时区与不同历法处理指南

// 获取所有支持的时区ID
Set<String> zoneIds = ZoneId.getAvailableZoneIds(); 

// 创建时区对象
ZoneId shanghaiZone = ZoneId.of("Asia/Shanghai");
ZoneOffset offset = ZoneOffset.ofHours(8); // UTC+8

// 获取当前上海时间
ZonedDateTime shanghaiTime = ZonedDateTime.now(shanghaiZone);

// 指定时间创建
ZonedDateTime newYorkTime = ZonedDateTime.of(
    2025, 3, 30, 14, 30, 0, 0, ZoneId.of("America/New_York")
);

ZonedDateTime shanghaiTime = ZonedDateTime.now(ZoneId.of("Asia/Shanghai"));
ZonedDateTime newYorkTime = shanghaiTime.withZoneSameInstant(ZoneId.of("America/New_York"));

System.out.println("上海时间: " + shanghaiTime); // 2025-03-30T14:30+08:00[Asia/Shanghai]
System.out.println("纽约时间: " + newYorkTime);  // 2025-03-30T02:30-04:00[America/New_York]

ZonedDateTime beforeDST = ZonedDateTime.of(
    2025, 3, 9, 1, 30, 0, 0, ZoneId.of("America/New_York")
);
ZonedDateTime afterDST = beforeDST.plusHours(1);

System.out.println(beforeDST); // 2025-03-09T01:30-05:00[America/New_York]
System.out.println(afterDST);  // 2025-03-09T03:30-04:00[America/New_York]（时钟拨快1小时）

// 泰国佛历（年份 = 公历年份 + 543）
ThaiBuddhistDate thaiDate = ThaiBuddhistDate.now();
System.out.println(thaiDate); // ThaiBuddhist BE 2568-03-30

// 日本历（支持不同年号）
JapaneseDate japaneseDate = JapaneseDate.now();
System.out.println(japaneseDate); // Japanese Reiwa 7-03-30（令和7年）

// 将公历日期转为日本历
LocalDate isoDate = LocalDate.of(2025, 3, 30);
JapaneseDate japaneseDate = JapaneseDate.from(isoDate);

DateTimeFormatter formatter = DateTimeFormatter
    .ofPattern("yyyy-MM-dd HH:mm:ss Z '('zzz')'")
    .withZone(ZoneId.of("Asia/Tokyo"));

ZonedDateTime time = ZonedDateTime.now();
String formatted = time.format(formatter); 
// 输出示例：2025-03-30 15:30:45 +0900 (JST)

ThaiBuddhistDate thaiDate = ThaiBuddhistDate.now();
DateTimeFormatter thaiFormatter = DateTimeFormatter
    .ofPattern("G yyyy-MM-dd")
    .withChronology(ThaiBuddhistChronology.INSTANCE);

String formatted = thaiDate.format(thaiFormatter); // BE 2568-03-30

ZonedDateTime utcTime = ZonedDateTime.now(ZoneOffset.UTC);

ZoneId userZone = ZoneId.of("Europe/Paris");
ZonedDateTime userTime = utcTime.withZoneSameInstant(userZone);

LocalDateTime meetingTime = LocalDateTime.of(2025, 3, 30, 15, 0);
ZoneId londonZone = ZoneId.of("Europe/London");
ZoneId tokyoZone = ZoneId.of("Asia/Tokyo");

ZonedDateTime londonTime = ZonedDateTime.of(meetingTime, londonZone);
ZonedDateTime tokyoTime = londonTime.withZoneSameInstant(tokyoZone);

// 将公历日期转为伊斯兰历（可能抛出异常）
try {
    HijrahDate hijrahDate = HijrahDate.from(LocalDate.of(2025, 3, 30));
} catch (DateTimeException e) {
    System.out.println("该日期在伊斯兰历中无效！");
}