Java计算日期和时间差

用joda datetime的days.between即可。

  DateTime dt1 = new DateTime(d1);
            DateTime dt2 = new DateTime(d2);

            System.out.print("两个时间相差：");
            System.out.print(Days.daysBetween(dt1, dt2).getDays() + " 天, ");

refurl:http://www.blogjava.net/qiyadeng/archive/2013/02/19/395428.html

http://wandejun1012.iteye.com/admin/blogs/1746662