Java时间差计算返回时差

       public static void main(String[] args) {

BigDecimal startT= new BigDecimal(fromDateStringToLong("2011-05-05 19:30:10"));

BigDecimal endT =new BigDecimal(fromDateStringToLong("2011-05-05 16:30:20"));

BigDecimal mm = new BigDecimal((startT.doubleValue() - endT.doubleValue())/3600000);

System.out.println(mm.setScale(1,BigDecimal.ROUND_HALF_UP));

}

 

 

public static long fromDateStringToLong(String inVal) { 

Date date = null;  

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");

try {

date = sdf.parse(inVal); 

} catch (Exception e) {

e.printStackTrace();

}

return date.getTime(); 

}