计算两个日期天、钟点、分钟、秒

计算两个日期天、小时、分钟、秒

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public static void dateDiff(String startTime, String endTime, String format) {
??? ??? // 按照传入的格式生成一个simpledateformate对象
??? ??? SimpleDateFormat sd = new SimpleDateFormat(format);
??? ??? long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数
??? ??? long nh = 1000 * 60 * 60;// 一小时的毫秒数
??? ??? long nm = 1000 * 60;// 一分钟的毫秒数
??? ??? long ns = 1000;// 一秒钟的毫秒数
??? ??? long diff;
??? ??? try {
??? ??? ??? // 获得两个时间的毫秒时间差异
??? ??? ??? diff = sd.parse(endTime).getTime() - sd.parse(startTime).getTime();
??? ??? ??? long day = diff / nd;// 计算差多少天
??? ??? ??? long hour = diff % nd / nh;// 计算差多少小时
??? ??? ??? long min = diff % nd % nh / nm;// 计算差多少分钟
??? ??? ??? long sec = diff % nd % nh % nm / ns;// 计算差多少秒
??? ??? ??? // 输出结果
??? ??? ??? System.out.println("时间相差：" + day + "天" + hour + "小时" + min + "分钟"
??? ??? ??? ??? ??? + sec + "秒。");
??? ??? } catch (Exception e) {
??? ??? ??? e.printStackTrace();
??? ??? }
??? }