Java将UTC时间戳转换为本地DateTime
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Java convert UTC timestamp to local DateTime
提问by kazemipouya
I know there are dozens of answered posts about converting UTC Time/Date To/From local time already but non helped me to figure out what my problem is. My question is: By having UTC timestamp, how can i get local DateTime? This is what I have right now but this just convert the timestamp to DateTime format.
我知道已经有很多关于将 UTC 时间/日期转换为本地时间的回答帖子，但没有帮助我弄清楚我的问题是什么。我的问题是：通过拥有 UTC 时间戳，我如何获得本地日期时间？这就是我现在所拥有的，但这只是将时间戳转换为 DateTime 格式。
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
sdf.setTimeZone(TimeZone.getDefault());
sdf.format(new Date(timestamp * 1000));
Edited: I'm saving the UTC timestamp on the cloud so every device (Android/iOS) can query and convert to it's time zone.
编辑：我将 UTC 时间戳保存在云上，以便每个设备（Android/iOS）都可以查询并转换为它的时区。
采纳答案by Biraj Zalavadia
Try this is working with me
试试这对我有用
public String getDateCurrentTimeZone(long timestamp) {
try{
Calendar calendar = Calendar.getInstance();
TimeZone tz = TimeZone.getDefault();
calendar.setTimeInMillis(timestamp * 1000);
calendar.add(Calendar.MILLISECOND, tz.getOffset(calendar.getTimeInMillis()));
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date currenTimeZone = (Date) calendar.getTime();
return sdf.format(currenTimeZone);
}catch (Exception e) {
}
return "";
}
回答by Ruchira Gayan Ranaweera
You can try this
你可以试试这个
String DATE_FORMAT = "EEE, dd MMM yyyy HH:mm:ss a z" ;
final SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
String dateTimeString = sdf.format(new Date());
System.out.println(dateTimeString); // current UTC time
long timeStamp=sdf.parse(dateTimeString).getTime(); //current UTC time in milisec
Calendar cal = Calendar.getInstance();
cal.setTime(new Date(timeStamp));
cal.add(Calendar.HOUR_OF_DAY, 5);
cal.add(Calendar.MINUTE, 30);
System.out.println(sdf.format(cal.getTime())); // time relevant to UTC+5.30
回答by Anand Jagtap
U can use Joda time to convert local to UTC and vice-versa e.g Local to UTC
您可以使用 Joda 时间将本地转换为 UTC，反之亦然，例如本地转换为 UTC
DateTime dateTimeNew = new DateTime(date.getTime(), DateTimeZone.forID("Asia/Calcutta"));
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
simpleDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
String datetimeString = dateTimeNew.toString("yyyy-MM-dd HH:mm:ss");
long milis = 0;
try {
milis = simpleDateFormat.parse(datetimeString).getTime();
} catch (ParseException e) {
e.printStackTrace();
}
