给定日期判断周几

网上看到的，共享出来，网址忘了，莫见怪！

 

public class Test {
	protected String backDayandWeek(Date date){
		Calendar c = Calendar.getInstance();
		c.setTime(date);
		String[] weekDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
		// 一周中的第几天(国外周日是第一天,所以需要减1)
		int n = c.get(Calendar.DAY_OF_WEEK)-1;
	    if (n < 0) n = 0;    
	    return weekDays[n];
	}
	public static void main(String[] args) throws ParseException {
		Test t = new Test();
		Date date = new Date();
		System.out.println(t.backDayandWeek(date));
	}
}