yyyyMMddhhmmss（20140707103709）轉換爲yyyy-MM-dd HH:mm:ss（2014-07-07 10:37:09）

SimpleDateFormat sdf1 = new SimpleDateFormat("yyyyMMddhhmmss");
Date date = (Date) sdf1.parse(s);
SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.print(sdf2.format(date));