1.如何取得年 月日、小时分钟秒?
public static void main(String[] args) { Calendar cal = Calendar.getInstance(); System.out.println(cal.get(Calendar.YEAR)); System.out.println(cal.get(Calendar.MONTH)); // 0 - 11 System.out.println(cal.get(Calendar.DATE)); System.out.println(cal.get(Calendar.HOUR_OF_DAY)); System.out.println(cal.get(Calendar.MINUTE)); System.out.println(cal.get(Calendar.SECOND)); // Java 8 LocalDateTime dt = LocalDateTime.now(); System.out.println(dt.getYear()); System.out.println(dt.getMonthValue()); // 1 - 12 System.out.println(dt.getDayOfMonth()); System.out.println(dt.getHour()); System.out.println(dt.getMinute()); System.out.println(dt.getSecond()); }