比如：现在是2016-03-26 13：31：40
过去是：2016-01-02 11：30：24
我现在要获得两个日期差，差的形式为：XX天XX小时XX分XX秒
方法一：
DateFormat df =
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try
{
Date d1 = df.parse("2016-03-26 13:31:40");
Date d2 = df.parse("2016-01-02 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+"小时"+min+"分"+s+"秒");
方法三：
SimpleDateFormat dfs =
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
java.util.Date begin=dfs.parse("2016-01-02 11:30:24");
java.util.Date end = dfs.parse("2016-03-26 13:31:40");
long between=(end.getTime()-begin.getTime())/1000;
//
除以1000是为了转换成秒
long day1=between/(24*3600);
long hour1=between%(24*3600)/3600;
long minute1=between600/60;
long second1=between`/60;
System.out.println(""+day1+"天"+hour1+"小时"+minute1+"分"+second1+"秒");
====================================================
java 比较时间大小
String s1="2016-01-25 09:12:09";
String s2="2016-01-29 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("格式不正确");
}
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");
转载于:https://www.cnblogs.com/jym-sunshine/p/5564231.html
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