現在是2004-03-26 13：31：40過去是：2004-01-02 11：30：24 要獲得兩個日期差，差的形式為：XX天XX小時XX分XX秒方法一： DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");try {Date d1 = df.parse("2004-03-26 13:31:40");Date d2 = df.parse("2004-01-02 11:30:24");long diff = d1.getTime() - d2.getTime();long days = diff / (1000 * 60 * 60 * 24); } catch (Exception e) { }方法二：SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");java.util.Date now = df.parse("2004-03-26 13:31:40");java.util.Date date=df.parse("2004-01-02 11:30:24");long l=now.getTime()-date.getTime();long day=l/(24*60*60*1000);long hour=(l/(60*60*1000)-day*24);long min=((l/(60*1000))-day*24*60-hour*60);long s=(l/1000-day*24*60*60-hour*60*60-min*60);System.out.println(""+day+"天"+hour+"小時"+min+"分"+s+"秒");方法三：SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");java.util.Date begin=dfs.parse("2004-01-02 11:30:24");java.util.Date end = dfs.parse("2004-03-26 13:31:40");long between=(end.getTime()-begin.getTime())/1000;//除以1000是為了轉換成秒long day1=between/(24*3600);long hour1=between%(24*3600)/3600;long minute1=between%3600/60;long second1=between%60/60;System.out.println(""+day1+"天"+hour1+"小時"+minute1+"分"+second1+"秒");====================================================java 比較時間大小 String s1="2008-01-25 09:12:09"; String s2="2008-01-29 09:12:11"; java.text.DateFormat df=new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); java.util.Calendar c1=java.util.Calendar.getInstance(); java.util.Calendar c2=java.util.Calendar.getInstance(); try { c1.setTime(df.parse(s1)); c2.setTime(df.parse(s2)); }catch(java.text.ParseException e){ System.err.println("格式不正確"); } int result=c1.compareTo(c2); if(result==0) System.out.println("c1相等c2"); else if(result<0) System.out.println("c1小于c2"); else System.out.println("c1大于c2");

轉載于:https://www.cnblogs.com/xiaowangba/p/6314185.html

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