java计算当前周开始日期&结束日期

 public static Date getFirstDayOfWeek(Date date) {
         Calendar c = new GregorianCalendar();
         c.setFirstDayOfWeek(Calendar.MONDAY);
         c.setTime(date);
         c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek()); // Monday
         return c.getTime();
     }

     public static Date getLastDayOfWeek(Date date) {
         Calendar c = new GregorianCalendar();
         c.setFirstDayOfWeek(Calendar.MONDAY);
         c.setTime(date);
         c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() + 6); // Sunday
         return c.getTime();
     }