/**
 * 獲取當前時間所在周的週一和週日的日期時間
 * @return
 */
public static Map<String,String> getWeekDate() {
	Map<String,String> map = new HashMap();
	SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

	Calendar cal = Calendar.getInstance();
	// 設定一個星期的第一天，按中國的習慣一個星期的第一天是星期一
	cal.setFirstDayOfWeek(Calendar.MONDAY);
	// 獲得當前日期是一個星期的第幾天
	int dayWeek = cal.get(Calendar.DAY_OF_WEEK);
	if(dayWeek==1){
	dayWeek = 8;
	}

	cal.add(Calendar.DATE, cal.getFirstDayOfWeek() - dayWeek);// 根據日曆的規則，給當前日期減去星期幾與一個星期第一天的差值
	Date mondayDate = cal.getTime();
	String weekBegin = sdf.format(mondayDate);

	cal.add(Calendar.DATE, 4 +cal.getFirstDayOfWeek());
	Date sundayDate = cal.getTime();
	String weekEnd = sdf.format(sundayDate);

	map.put("mondayDate", weekBegin);
	map.put("sundayDate", weekEnd);
	return map;
}