public Timestamp strToDate(int type){

         Timestamp time = null;

         DateFormat format2= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

         Date date = null;

         Calendar cale = Calendar.getInstance();

         cale.add(Calendar.DATE, type);

         String tarday = new SimpleDateFormat("yyyy-MM-dd").format(cale.getTime())+" 00:00:00";

         // String转Date    

         try {

            date = format2.parse(tarday);

            System.out.println(date.getTime());

            time = new Timestamp(date.getTime());

            System.out.println(time.toString());

         } catch (ParseException e) {

                    e.printStackTrace();

         }

         return time;

     }