Java 獲取當前時間的年、月、日、小時、分鍾、秒數

public static void getDateTime() throws ParseException{
            Calendar now = Calendar.getInstance();
            System.out.println("年: " + now.get(Calendar.YEAR));
            System.out.println("月: " + (now.get(Calendar.MONTH) + 1) + "");
            System.out.println("日: " + now.get(Calendar.DAY_OF_MONTH));
            System.out.println("時: " + now.get(Calendar.HOUR_OF_DAY));
            System.out.println("分: " + now.get(Calendar.MINUTE));
            System.out.println("秒: " + now.get(Calendar.SECOND));
            System.out.println("當前時間毫秒數：" + now.getTimeInMillis());
            System.out.println(now.getTime());

            Date d = new Date();
            System.out.println(d);
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            String dateNowStr = sdf.format(d);
            System.out.println("格式化后的日期：" + dateNowStr);

            String str = "2012-1-13 17:26:33";    //要跟上面sdf定義的格式一樣
            Date today = sdf.parse(str);
            System.out.println("字符串轉成日期：" + today);
   }

輸出結果：

2014-12-26
年: 2014
月: 12
日: 26
時: 15
分: 6
秒: 35
當前時間毫秒數：1419577595014
Fri Dec 26 15:06:35 CST 2014
Fri Dec 26 15:06:35 CST 2014
格式化后的日期：2014-12-26 15:06:35
字符串轉成日期：Fri Jan 13 17:26:33 CST 2012