Java获取日期

Java获取当前日期和星期几，代码如下

public class Test {

public static void main(String[] args) {

String [] week_day = new String[7];

week_day[0] ="星期日";

week_day[1] ="星期一";

week_day[2] ="星期二";

week_day[3] ="星期三";

week_day[4] ="星期四";

week_day[5] ="星期五";

week_day[6] ="星期六";

SimpleDateFormat sfd =new SimpleDateFormat("yyyy年MM月dd日 hh时mm分ss秒");

Calendar calendar =Calendar.getInstance();

System.out.println(sfd.format(calendar.getTime()));

int num = calendar.get(Calendar.DAY_OF_WEEK)-1;

if(num<0){

num=0;

}

System.out.println(week_day[num]);

}

}