Date获得当前时间，后获得年月日的方法，已经不在被经常使用，需要更新了

import java.util.Calendar;

public class SysDate {
public static void main(String[] args) {
Calendar c = Calendar.getInstance();
System.out.println("年：" + c.get(Calendar.YEAR));
System.out.println("月：" + (c.get(Calendar.MONTH) + 1));
System.out.println("日：" + c.get(Calendar.DAY_OF_MONTH));
System.out.println("24时制小时：" + c.get(Calendar.HOUR_OF_DAY));
System.out.println("12时制：" + c.get(Calendar.HOUR));
System.out.println("分：" + c.get(Calendar.MINUTE));
System.out.println("秒：" + c.get(Calendar.SECOND));
System.out.println("今天是一年中的第：" + c.get(Calendar.DAY_OF_YEAR) + "天");
}
} 
还有很多，自己发现吧。