try {
String date_str1 = "2016-11-07 10:00";
String date_str2 = "2016-11-09 10:00";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
Date date1 = sdf.parse(date_str1);
Date date2 = sdf.parse(date_str2);
int day = (int)(date2.getTime()-date1.getTime())/(24*60*60*1000);
System.out.println(day);
} catch (Exception e) {
}
http://takeme.iteye.com/blog/1678179