java - How to convert timestamp into days ago

Question

I have my MySQL database inserting timestamp when I upload a record, so what's entered is something like 2013-02-02 16:59:29. Is there a Java way to convert that into something like 10 Days Ago?

Answer 1

假设您已将数据库中的日期时间值读入 java：

Date date; // read from database
int days = TimeUnit.MILLISECONDS.toDays(
     System.currentTimeMillis() - date.getTime());

然后你可以随意格式化它。

Answer 2

借助结果集从 mysql 获取时间并将时间数据传递给以下方法

    public static void main(String[] args) {                

     long timStampFromMysql = rs.getTimestamp("time");// Fetch time from mysql
                Calendar cal =  Calendar.getInstance();
                cal.setTimeInMillis(convertTime(timStampFromMysql , 15));
                System.out.println(cal);

            }

            public static long convertTime(long timeInMillies, int days)
            {

                 Calendar calendar = Calendar.getInstance();
                    calendar.setTimeInMillis(timeInMillies);
                    calendar.add(Calendar.DAY_OF_YEAR, days);

                    return calendar.getTimeInMillis();



            }

Answer 3

Joda TimeDays.daysBetween库中的将为您计算。

DateTime start = new DateTime(time_ms);
DateTime end   = new DateTime(now);
Days days = Days.daysBetween(start, end);
int d = days.getDays();