Java 獲取當前時間的年、月、日、小時、分鍾、秒數。
1 public static void getDateTime() throws ParseException{ 2 Calendar now = Calendar.getInstance(); 3 System.out.println("年: " + now.get(Calendar.YEAR)); 4 System.out.println("月: " + (now.get(Calendar.MONTH) + 1) + ""); 5 System.out.println("日: " + now.get(Calendar.DAY_OF_MONTH)); 6 System.out.println("時: " + now.get(Calendar.HOUR_OF_DAY)); 7 System.out.println("分: " + now.get(Calendar.MINUTE)); 8 System.out.println("秒: " + now.get(Calendar.SECOND)); 9 System.out.println("當前時間毫秒數：" + now.getTimeInMillis()); 10 System.out.println(now.getTime()); 11 12 Date d = new Date(); 13 System.out.println(d); 14 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 15 String dateNowStr = sdf.format(d); 16 System.out.println("格式化后的日期：" + dateNowStr); 17 18 String str = "2012-1-13 17:26:33"; //要跟上面sdf定義的格式一樣 19 Date today = sdf.parse(str); 20 System.out.println("字符串轉成日期：" + today); 21 }
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