utc时间转换

DateTimeFormatter dateTimeformatter = DateTimeFormatter.ofPattern ( "yyyy-MM-dd HH:mm:ss z" );

ZonedDateTime zoneDateTime = ZonedDateTime.parse ( "2017-05-10 12:43:04 UTC" , dateTimeformatter );

Instant instant = zoneDateTime.toInstant ();

long epochSecond = instant.getEpochSecond();

System.out.println(epochSecond);

Instant instantEpochSecond = Instant.ofEpochSecond(epochSecond);

ZonedDateTime epochZoneDateTime = ZonedDateTime.ofInstant(instantEpochSecond, ZoneOffset.UTC);

Date date = Date.from(epochZoneDateTime.toInstant());

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss z");

System.out.println(sdf.format(date));