获取时间的方式

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Calendar：

        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());

Day:

        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);

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