关于java:JAVA日常工作日期转换

1.格林威治工夫转换成北京工夫(13位毫秒值转成时分秒)
1.1：先转成时分秒的格局，间接在小时上减少8小时

if (StringUtil.isNotEmpty(list)) {
    String str = list.get(0).get("startTime").toString();
 Date date = DateUtils.stringtoDate(str, "yyyy-MM-dd'T'HH:mm:ss.SSS");
 date = DateUtils.addHour(date, 8);
 String formatDate = DateUtils.dateToString(date, "yyyy-MM-dd HH:mm:ss.SSS");
 list.get(0).put("startTime", formatDate);
 return list.get(0);
}

1.2：间接转换成北京工夫（最初后果失去的13位毫秒值）

    public static long tzToLong(String time){
        time = time.replace("Z", " UTC");
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS Z");
        SimpleDateFormat defaultFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date times = null;
        try {
            times = format.parse(time);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        String result = defaultFormat.format(times);
        Date parse = null;
        try {
            parse = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(result);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        Long milliTime = parse.getTime();
        return milliTime;
    }

2.时分秒转换成13位毫秒值(工夫戳)

        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date = simpleDateFormat.parse(s); 
        long time = date.getTime();
       String milliTime = String.valueOf(time);