怎么获取时间差，求程序猿大神指点

// date为当前时间 date1为过期时间 public static String judgeDeadLine(Date date, Date date1) throws IllegalAccessException { if (date == null || date1 == null) throw new IllegalAccessException("日期不可为空"); long time1 = date.getTime(), time2 = date1.getTime(); if (time1 - time2 > 0) { System.out.println("已经过期"); return null; } long second = (time2 - time1) / 1000; StringBuilder sb = new StringBuilder("还剩"); int day = (int) (second / 86400); sb.append(day).append("天"); second %= 86400; int hour = (int) (second / 3600); sb.append(hour).append("小时"); second %= 3600; int min = (int) (second / 60); sb.append(min).append("分").append(second %= 60).append("秒过期"); return sb.toString(); }

ibatis 不是直接就可以得到包装类的list集合中，调用对象的getXXtime进行日期加减运算不就可以了吗？