java将时间戳转换为UTC时区

Question

public static long getCurrentEpochTimeStamp(String timeStamp) throws Exception {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'.0Z'");
    Date date = sdf.parse(timeStamp);
    return date.getTime();
}

这个方法返回当前时间戳，我需要将其转换为UTC时区

Answer 1

将时区设置为SimpleDateFormat对象

sdf.setTimeZone(TimeZone.getTimeZone("UTC"));