DateFormat

SimpleDateFormat:

public long str2Date(String dateString){
 public java.util.Date str2Date(String dateString,String formatString){
  DateFormat format = new SimpleDateFormat(formatString);
  try{
   java.util.Date date = format.parse(dateString);
   return date;
  }catch(ParseException e){
   e.printStackTrace();
   return null;
  }
 }
 public long str2Time(String dateString,String formatString){
  java.util.Date date = str2Date(dateString, formatString);
  if(date==null)return 0;
  return date.getTime();
 }
 @Test
 public void testDate(){
  String date1 = "2016-02-03 00:21:33";
  String format1 = "yyyy-MM-dd hh:mm:ss";
  long time = str2Time(date1, format1);
  System.out.println(System.currentTimeMillis() - str2Time(date1, format1));
 }