可以使用下面的代码：
[code]long diff = d2.getTime() - d1.getTime();//as given
long seconds = TimeUnit.MILLISECONDS.toSeconds(diff);
long minutes = TimeUnit.MILLISECONDS.toMinutes(diff); [/code]
如果计算不同的天数：
[code]long diff = d2.getTime() - d1.getTime();//as given
long days= TimeUnit.MILLISECONDS.toDays(diff); [/code]