JAVA中计算两个时间相差多少 天，时，分，秒

   1: import java.util.Date;

   2:  

   3: public class ShowTimeInterval{

   4:     public void ShowTimeInterval(Date date1, Date date2) {

   5:     long lDate1 = date1.getTime();

   6:     long lDate2 = date2.getTime();

   7:     long diff = (lDate1 < lDate2) ? (lDate2 - lDate1) : (lDate1 - lDate2);

   8:       long day = diff / (24 * 60 * 60 * 1000);

   9:       long hour = diff / (60 * 60 * 1000) - day * 24;

  10:       long min = diff / (60 * 1000) - day * 24 * 60 - hour * 60;

  11:     long sec = diff / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60;

  12:     System.out.println("date1 与 date2 相差 " + day + "天" + hour + "小时" + min + "分" + sec + "秒");

  13:     }

  14: }