Java 获取当前时间的年、月、日、小时、分钟、秒数

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("时: " + 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("当前时间毫秒数：" + 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定义的格式一样
            Date today = sdf.parse(str);
            System.out.println("字符串转成日期：" + today);
   }

输出结果：

2014-12-26
年: 2014
月: 12
日: 26
时: 15
分: 6
秒: 35
当前时间毫秒数：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
字符串转成日期：Fri Jan 13 17:26:33 CST 2012