Java获取当前时间的年月日方法

 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("时: " + 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("当前时间毫秒数：" + 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定义的格式一样
19             Date today = sdf.parse(str);
20             System.out.println("字符串转成日期：" + today);
21    }