Timestamp和String相互轉換

Timestamp和String類型相互轉換例子：

      String str = "2018-05-06 10:30:40";
      //String 轉 Timestamp
      Timestamp time = Timestamp.valueOf(str);
       //Timestamp 轉 String
       String strn = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(time);