1.public class Test {
2.public void dateDiff(String startTime, String endTime, Stringformat) {
3.//按照传入的格式生成一个simpledateformate对象
4.SimpleDateFormat sd = new SimpleDateFormat(format);
5.long nd = 1000*24*60*60;//一天的毫秒数
6.long nh = 1000*60*60;//一小时的毫秒数
7.long nm = 1000*60;//一分钟的毫秒数
8.long ns = 1000;//一秒钟的毫秒数
9.long diff;
10.try {
11.//获得两个时间的毫秒时间差异
12.diff = sd.parse(endTime).getTime() -sd.parse(startTime).getTime();
13.long day = diff/nd;//计算差多少天
14.long hour = diff%nd/nh;//计算差多少小时
15.long min = diff%nd%nh/nm;//计算差多少分钟
16.long sec = diff%nd%nh%nm/ns;//计算差多少秒
17.//输出结果
18.System.out.println("时间相差："+day+"天"+hour+"小时"+min+"分钟"+sec+"秒。");
19.} catch (ParseException e) {
20.e.printStackTrace();
21.}
22.}
23.
24.
25.public static void main(String[] args) {
26.new Test().dateDiff(newSimpleDateFormat("yyyy-MM-dd").format(new Date()),"2010-8-23", "yyyy-MM-dd");
27.}
28.}
PI3000源代码中的方式：在nariis.pi3000.framework.utility.DateUtil类中
**
*计算两个日期差
*@param one
*@param two
*@return
*/
publicstatic long getDiffDays(Date one, Date two)
{
Calendar sysDate = new GregorianCalendar();
sysDate.setTime(one);
Calendar failDate = new GregorianCalendar();
failDate.setTime(two);
return ((sysDate.getTimeInMillis() -failDate.getTimeInMillis()) / 86400000L);
}
