java 获取特定天数的时间戳

 1     public Timestamp strToDate(int type){
 2         Timestamp time = null;
 3         DateFormat format2= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");         
 4         Date date = null;    
 5         Calendar cale = Calendar.getInstance();
 6         cale.add(Calendar.DATE, type);
 7         String tarday = new SimpleDateFormat("yyyy-MM-dd").format(cale.getTime())+" 00:00:00";
 8                 
 9         // String转Date    
10                 
11         try {               
12            date = format2.parse(tarday); 
13            System.out.println(date.getTime());
14            time = new Timestamp(date.getTime());
15            System.out.println(time.toString());
16         } catch (ParseException e) {    
17                    e.printStackTrace();  
18         }
19     
20         return time;
21     }