String sdt="12/30/2005";
try{
Date dt = new SimpleDateFormat("MM/dd/yyyy").parse(sdt);//转成Date类型,
sdt = new SimpleDateFormat("yyyyMMdd").format(dt);
System.out.println(sdt);
}
catch(Exception e){}
Calendar c1= Calendar.setTime(dt1);
Calendar c2 = Calendar.setTime(dt2);
int m1= c1.get(Calendar.MONTH);//给你个思路,还可以年,日
int m2= c2.get(Calendar.MONTH);
int m = |m1 - m2|; m1 & m2 月数差
int y = |c1.get(Calendar.YEAR); - c1.get(Calendar.YEAR);//年差
int d = |c1.getTimeInMillis() - c2.getTimeInMillis() |/24*3600*1000