gmt

问题 I need to force any time related operations to GMT/UTC, regardless the timezone set on the machine. Any convenient way to so in code? To clarify, I\'m using the DB server time for all operations, but it comes out formatted according to local timezone. Thanks! 回答1: The OP answered this question to change the default timezone for a single instance of a running JVM, set the user.timezone system property: java -Duser.timezone=GMT ... <main-class> If you need to set specific time zones when

问题 I need the ability to convert an NSDate value to a GMT Date. How can I go about converting an NSDate value to a GMT formatted NSDate value, independent of whatever date locale settings the iPhone device is using? 回答1: NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; dateFormatter.dateFormat = @"yyyy-MM-dd'T'HH:mm"; NSTimeZone *gmt = [NSTimeZone timeZoneWithAbbreviation:@"GMT"]; [dateFormatter setTimeZone:gmt]; NSString *timeStamp = [dateFormatter stringFromDate:[NSDate date]];

问题 In Java, I want to get the current time in GMT. I tried various options like this: Date date = new Date(); Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone(\"GMT\")); date1 = calendar.getTime(); But the date is always is interpreted in my local time zone. What am I doing wrong and how can I convert a java Date to GMT? 回答1: Odds are good you did the right stuff on the back end in getting the date, but there's nothing to indicate that you didn't take that GMT time and format it

问题 Code: SimpleDateFormat sdf = new SimpleDateFormat(\"yyyy.MM.dd HH:mm:ss z\"); sdf.setTimeZone(TimeZone.getTimeZone(\"GMT\")); System.out.println(new Date()); try { String d = sdf.format(new Date()); System.out.println(d); System.out.println(sdf.parse(d)); } catch (Exception e) { e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. } Output: Thu Aug 08 17:26:32 GMT+08:00 2013 2013.08.08 09:26:32 GMT Thu Aug 08 17:26:32 GMT+08:00 2013 Note that format()

问题 I get a datetime field, that\'s currently in the query as: SELECT DATE_FORMAT(x.date_entered, \'%Y-%m-%d\') AS date FROM x ORDER BY date ASC What I want to do is to subtract 3 hours from that date (GMT issues), but I can\'t do it in PHP as PHP only knows the date part, not the time. 回答1: mySQL has DATE_SUB(): SELECT DATE_SUB(column, INTERVAL 3 HOUR).... but would it not be better to try and sort out the underlying time zone issue instead? 回答2: Assuming you have some timezone issue and know

问题 I would like to get the GMT [ Greenwich Mean Time ], and also I don\'t want to rely on my system date time for that. Basically, I want to use time sync server like in.pool.ntp.org [ India ] for GMT calculation, or may be I am going in wrong direction! How to do this in java ? Is there any java library to get time from Time server? 回答1: sp0d is not quite right: timeInfo.getReturnTime(); // Returns time at which time message packet was received by local machine So it just returns current system

问题 Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct. Answers without enough detail may be edited or deleted. When I create a new Date object, it is initialized to the current time but in the local timezone. How can I get the current date and time in GMT? 回答1: java.util.Date has no specific time zone, although its value is most commonly thought of in relation to UTC. What makes you think it's in local time?

问题 I am storing time zone by offset-from-UTC for an application using this dropdown: <select id=\"timezone\" name=\"timezone\" > <option value=\"-12\">[UTC - 12] Baker Island Time</option> <option value=\"-11\">[UTC - 11] Niue Time, Samoa Standard Time</option> <option value=\"-10\">[UTC - 10] Hawaii-Aleutian Standard Time, Cook Island Time</option> <option value=\"-9.5\">[UTC - 9:30] Marquesas Islands Time</option> <option value=\"-9\">[UTC - 9] Alaska Standard Time, Gambier Island Time</option