SimpleDateFormat

12/9/14:(月日前沒0) SimpleDateFormat("M/d/yy")

12/09/14:(月日前有0) SimpleDateFormat("MM/dd/yy")

 

 

 

Timestamp ts = new Timestamp(System.currentTimeMillis());
        String tsStr = "";
        DateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
        try {
            //方法一
            tsStr = sdf.format(ts);
            System.out.println(tsStr);
            //方法二
            tsStr = ts.toString();
            System.out.println(tsStr);
        } catch (Exception e) {
            e.printStackTrace();
        }