I don't have much experience with these, though. In Java 7 and below, you can use the System.currentTimeMillis () method to get the current time in milliseconds. #getDate(int, )Īlternatively you might use a TIMESTAMP WITH TIME ZONE, or TIMESTAMP WITH LOCAL TIME ZONE as the data type, as these types take time zones into account and the time zone information should be transferred correctly between application and the database when using these data types. SimpleDateFormat is mainly used in the older version of Java, such as Java8. Current UTC Time - SimpleDateFormat SimpleDateFormat is one of the most important classes which plays an important role in getting UTC time. Some of the methods I'm speaking about are: In Java, there are many ways to get UTC time which are given below: 1. I'm not sure these operations are thread-safe and I'd suggest allocating a new calendar for each thread that uses these methods (I'm using ThreadLocal variables for this myself). What youre seeing is only the formatting of the date by the Date.toString() method, which uses your local timezone, always.
The date is stored to the database in the time zone of the supplied calendar upon retrieval it is converted to the time zone of the supplied calendar. This, and most answers in this thread, are misleading.
#JAVA GET UTC TIME WINDOWS#
You'll use the setDate/ getDate methods of PreparedStatement or Resultset which take an additional Calendar parameter. On Windows XP systems, the ToUniversalTime method recognizes only the current adjustment rule when converting from local time to UTC. suggests that the way to get the UTC timestamp in Java is the following: Instant.now () // Capture the current moment in UTC. The conversion can take place during storing/retrieving the dates from the DB. 1, java.time package: This is the basic package of the new Java Date/Time API, all the main basic classes are part of this package, such as: LocalDate, LocalTime, LocalDateTime, Instant, Period, Duration and so on. (GMT/UTC doesn't have Daylight Saving Time.) The time zone you choose should not have Daylight Saving Time, though, because in time zones that have DST it is not possible to represent all hours in the day when the DST ends. The toUTCString method converts a date to a string using the UTC time zone.
GMT/UTC might be a good choice, but is it not necessary you might choose a time zone closer to your local time zone, which might be more convenient to you. Get the current Date and Time in UTC using JavaScript Use the toUTCString () method to get the current date and time in utc, e.g. My advice would be to choose a time zone and store all DATE columns in the database in that time zone. Oracle's DATE does not have a time zone information, so you need to handle the time zones yourself.
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