得到当前时间
1.  Calendar.getInstance().getTime();
2.  new Timestamp(System.currentTimeMillis());
3.  new Timestamp((Calendar.getInstance().getTime()).getTime());
                   --------------------------------
                                |
                               date

 

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  SimpleDateFormat df = new SimpleDateFormat("MM/dd/yyyy HH:mm");
  
  //Calendar
  Date date = Calendar.getInstance().getTime();
  System.out.println(df.format(date));
  
  //Timestamp
  System.out.println(df.format(new Timestamp(System.currentTimeMillis())));
              System.out.println(df.format(new Timestamp(date.getTime())));


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    rs.getTimestamp("ORIGINAL_RESPONSE_DATETIME");

  Calendar c = Calendar.getInstance();
  c.setLenient(false);
  c.set(year, month-1, day, hour, minutes, 0);
  c.set(Calendar.MILLISECOND, 0);
  c.setTime(date);
         c.add(Calendar.MONTH, n);  //在日期上增加数个整月   
  new Timestamp(c.getTime().getTime());