java计算时间的 分钟差

public Long getMin(String  sdate,String  edate){

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMddHHmm");

Date start = simpleDateFormat .parse(sdate);

Date end = simpleDateFormat .parse(edate);

long between = (end.getTime() - start .getTime())/1000;

long min = between/60;

return min;

}