Java将时间处理成xx天前、xx年前的格式

    import java.text.ParseException;        import java.text.SimpleDateFormat;        import java.util.Calendar;        import java.util.Date;                /**        *         * @author Robot        *        */        public class test {                        public static Date getDateByString(String time) {                Date date = null;                if(time == null) return date;                String date_format = "yyyy-MM-dd HH:mm:ss";                SimpleDateFormat format = new SimpleDateFormat(date_format);                try {                    date = format.parse(time);                } catch (ParseException e) {                    e.printStackTrace();                }                return date;            }                        public static String getShortTime(String time) {                String shortstring = null;                long now = Calendar.getInstance().getTimeInMillis();                Date date = getDateByString(time);                if(date == null) return shortstring;                long deltime = (now - date.getTime())/1000;                if(deltime > 365*24*60*60) {                    shortstring = (int)(deltime/(365*24*60*60)) + "年前";                } else if(deltime > 24*60*60) {                    shortstring = (int)(deltime/(24*60*60)) + "天前";                } else if(deltime > 60*60) {                    shortstring = (int)(deltime/(60*60)) + "小时前";                } else if(deltime > 60) {                    shortstring = (int)(deltime/(60)) + "分前";                } else if(deltime > 1) {                    shortstring = deltime + "秒前";                } else {                    shortstring = "1秒前";                }                return shortstring;            }                        public static void main(String[] args) {                String time = "2012-02-28 10:40:55";                System.out.println(getShortTime(time));            }                    }