package?business.education.impl;

import?java.text.DateFormat;
import?java.text.ParseException;
import?java.text.SimpleDateFormat;
import?java.util.Calendar;
import?java.util.Date;
import?java.util.List;

public?class?DateOperate?{
	public?static?Date?workDays（Date?startDate?int?days）?{
		Date?endDat