java获取日期是星期几

1、/** * 获取指定日期是星期几

  * 参数为null时表示获取当前日期是星期几

  * @param date

  * @return

*/

public static String getWeekOfDate(Date date) {      

    String[] weekOfDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};        

    Calendar calendar = Calendar.getInstance();      

    if(date != null){        

         calendar.setTime(date);      

    }        

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

    if (w < 0){        

        w = 0;      

    }      

    return weekOfDays[w];    

}

1、public static void main(String[] args){

    //今天是2014-12-25 星期四

    String weekOfDate = null;

    weekOfDate = getWeekOfDate(null);

    System.out.println(weekOfDate);

    //输出 星期四

    Date date = new Date();

    date.setDate(24);

    weekOfDate = getWeekOfDate(date);

    System.out.println(weekOfDate);

    //输出 星期三

 }