public long getTimestamp() throws ParseException{
 Date date1 = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")
  .parse("2009/12/11 00:00:00");
  Date date2 = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")
  .parse("1970/01/01 08:00:00");
  long l = date1.getTime() - date2.getTime() > 0 ? date1.getTime()
  - date2.getTime() : date2.getTime() - date1.getTime();
  long rand = (int)(Math.random()*1000);
  return rand;
}

public void getDate(String unixDate) {
 SimpleDateFormat fm1 = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
 SimpleDateFormat fm2 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
 long unixLong = 0;
 String date = "";
 try {
 unixLong = Long.parseLong(unixDate) * 1000;
 } catch(Exception ex) {
 System.out.println("String转换Long错误，请确认数据可以转换！");
 }
 try {
 date = fm1.format(unixLong);
 date = fm2.format(new Date(date));
 } catch(Exception ex) {
 System.out.println("String转换Date错误，请确认数据可以转换！");
 }
 System.out.println(date);
}

System.currentTimeMillis();