1-时间、日期

1、获取小时

注意设置时区，calendar方法设置的时区可能会失效，一般用SimpleDateFormat

public String  getHour(long ts) {
        Date date1 = new  Date(ts);
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
        calendar.setTime(date1);
        return String.valueOf(Calendar.HOUR_OF_DAY);
}

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH");
        simpleDateFormat.setTimeZone(TimeZone.getTimeZone("GMT+8"));
        String t = simpleDateFormat.format(ts);

org.apache.commons.lang.time.DateUtils
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