Java中格林尼治时间和时间戳的相互转换

/**
 * 格林尼治时间转换为时间戳
 */
public static long iso8601FormateTimeToLong(String time){
  String formateTime = iso8601ToCustomerDate(time,"yyyy年M月d日 HH:mm:ss");
  SimpleDateFormat sdf = new SimpleDateFormat("yyyy年M月d日 HH:mm:ss");
  Date date = null;
  try {
    date = sdf.parse(formateTime);
  } catch (ParseException e) {
    MXLog.e(MXLog.APP_WARN, e);
  }
  return date.getTime();
  }

/**
  * 时间戳转成本机时区的格林尼治时间
  * @param date
  * @return
  */
  public static String dateLongToiso8601(long date) {
  DateTime dateTime = new DateTime(date);
  return dateTime.toString("yyyy-MM-dd'T'HH:mm:ssZ");
  }

/**
     *  时间
     *  1）0-1min      刚刚
     *  2）1-60min     xx分钟前，如3分钟前
     *  3）1-24h        xx小时前，如2小时前
     *  4）昨天的       昨天+时+分，如，昨天 05:30
     *  5）昨天之前的   月+日+时+分，如，1月3日 05:30
     *  6）非本年       年+月+日+时+分，如2017年1月12日 05:30
     *
     * @param context
     * @param time
     * @return
     */
    public static String formateTime3(Context context,long time){
        boolean isTodayMessage = false;
        Calendar todayBegin = Calendar.getInstance();
        todayBegin.set(Calendar.HOUR_OF_DAY, 0);
        todayBegin.set(Calendar.MINUTE, 0);
        todayBegin.set(Calendar.SECOND, 0);
        Calendar todayEnd = Calendar.getInstance();
        todayEnd.set(Calendar.HOUR_OF_DAY, 23);
        todayEnd.set(Calendar.MINUTE, 59);
        todayEnd.set(Calendar.SECOND, 59);
        Calendar messageTime = Calendar.getInstance();
        messageTime.setTime(new Date(time));
        if (messageTime.before(todayEnd) && messageTime.after(todayBegin)) {
            isTodayMessage = true;
        }
        SimpleDateFormat formatter = null;
        int year = messageTime.get(Calendar.YEAR);
        Calendar currentCalendar = Calendar.getInstance();
        currentCalendar.setTime(new Date(System.currentTimeMillis()));
        int currentYear = currentCalendar.get(Calendar.YEAR);
        if (isTodayMessage) {
            long currentTime = System.currentTimeMillis();
            long duration = currentTime - time;
            if (duration < 60 * 1000 && duration >= 0) {
                //60s以内
                return "刚刚";
            } else if (duration >= 60 * 1000 && duration < 60 * 60 * 1000 ) {
                //大于1分钟，小于1小时
                return duration /60 /1000 + "分钟前";
            } else if (duration >= 3600 * 1000 && duration < 3600 * 24 * 1000) {
                //大于1小时
                return duration / 3600 /1000 + "小时前";
            }
        }else if (isYesterday(time)){
            formatter = new SimpleDateFormat("HH:mm");
            return "昨天" + formatter.format(messageTime.getTime());
        }else if (year != currentYear){
            formatter = new SimpleDateFormat("yyyy年M月d日 HH:mm");
        }else {
            formatter = new SimpleDateFormat("M月d日 HH:mm");
        }
        if (formatter == null){
            return "刚刚";
        }else{
            return formatter.format(messageTime.getTime());
        }
    }