managedate.java

本源码为教学管理信息系统

	* @return String
	*/
	public static String getDayOfWeek(String sdate, String fmt) {
		SimpleDateFormat df = new SimpleDateFormat(fmt);
		java.util.Date date = null;
		Calendar cal1 = Calendar.getInstance();
		String chiweek = null;
		try {
			date = df.parse(sdate);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		//设置时间
		cal1.setTime(date);
		int bh = cal1.get(Calendar.DAY_OF_WEEK);
		switch (bh) {
			case 1 :
				chiweek = "星期日";
				break;
			case 2 :
				chiweek = "星期一";
				break;
			case 3 :
				chiweek = "星期二";
				break;
			case 4 :
				chiweek = "星期三";
				break;
			case 5 :
				chiweek = "星期四";
				break;
			case 6 :
				chiweek = "星期五";
				break;
			case 7 :
				chiweek = "星期六";
				break;
		}
		return chiweek;
	}
	/**
	* 获得系统的当前年度
	* @return String
	*/
	public static String getYear() {
		return DTFormat(getCurDate(), "yyyy");
	}
	/**
	* 获得系统的当前月份
	* @return String
	*/
	public static String getMonth() {
		return DTFormat(getCurDate(), "MM");
	}
	/**
	* 获得系统的当前日
	* @return String
	*/
	public static String getDay() {
		return DTFormat(getCurDate(), "dd");
	}
	/**
	* 获得系统的当前年度
	* @return String
	*/
	public static int _getYear() {
		return Integer.parseInt(DTFormat(getCurDate(), "yyyy"));
	}
	/**
	* 获得系统的当前月份
	* @return String
	*/
	public static int _getMonth() {
		return Integer.parseInt(DTFormat(getCurDate(), "MM"));
	}
	public static String getMonthString() {
		return DTFormat(getCurDate(), "MM");
	}
	/**
	* 获得系统的当前日
	* @return String
	*/
	public static int _getDay() {
		return Integer.parseInt(DTFormat(getCurDate(), "dd"));
	}
	/**
	 * 获得指定日期是今年的第几周
	 */
	public static int getWeekOfYear(Date date) {			
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		return cal.get(Calendar.WEEK_OF_YEAR);
	}
	/**
	 * 获得指定日期是本月的第几周
	 */
	public static int getWeekOfMonth(Date date) {			
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		return cal.get(Calendar.WEEK_OF_MONTH);
	}
	/**
	 * 获得当前日期是今年的第几周
	 */
	public static int getWeekOfYear() {
		return getWeekOfYear(getCurDate());
	}
	/**
	 * 获得当前日期是今年的第几周
	 */
	public static int getRelWeekOfYear() {
		return getWeekOfYear(getRelDate(getCurDate(), -7));
	}
	/**
	 * 获得指定年有多少周
	 */
	public static int getWeekNumbersOfYear(int year) {
		GregorianCalendar cal = new GregorianCalendar(year,12,31);
		return cal.getMaximum(GregorianCalendar.WEEK_OF_YEAR);
	}	
	/**
	 * 获得指定日期是哪年哪月第几周,区分划分到上月和下月的周
	 * @throws ParseException author zmx 2006.04.01
	 */
	public static String getWeekOfCurrentYearMonth(Date date){	
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
		String date_temp= df.format(date);
		String rtn = "";
		
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		int week = cal.get(Calendar.WEEK_OF_MONTH);//当前周
		int chiweek = cal.get(Calendar.DAY_OF_WEEK);//当前星期
		
		Date pre_day = getRelDate(date,-1);//当前日期前一天
		cal.setTime(pre_day);		
		int pre_week = cal.get(Calendar.WEEK_OF_MONTH);	//前一天周	
		
		String lastday_temp =  getLastDate(Integer.valueOf(date_temp.substring(0,4)).intValue(),Integer.valueOf(date_temp.substring(5,7)).intValue());
		String lastday = lastday_temp.substring(0,4)+"-"+lastday_temp.substring(5,7)+"-"+lastday_temp.substring(8,10);
		
		Date last_day=null;
		try {
			last_day = df.parse(lastday);//本月最后一天
		} catch (ParseException e) {
			e.printStackTrace();
		}		
		cal.setTime(last_day);		
		int last_week = cal.get(Calendar.WEEK_OF_MONTH);//最后一天周
		int last_chiweek = cal.get(Calendar.DAY_OF_WEEK);//最后一天星期

		
		Date next_month_day = getRelDate(last_day,1);//本月最后一天的下一天,即下月初第一天
		
		String firstday = date_temp.substring(0,8)+"01";
		
		Date first_day=null;
		try {
			first_day = df.parse(firstday);//本月第一天
		} catch (ParseException e) {
			e.printStackTrace();
		}
		
		cal.setTime(first_day);		
		int first_chiweek = cal.get(Calendar.DAY_OF_WEEK);//本月第一天星期
		
		Date first_pre_day = getRelDate(first_day,-1);//本月第一天前一天
		cal.setTime(first_pre_day);		
		int first_pre_week = cal.get(Calendar.WEEK_OF_MONTH);	//本月第一天前一天周	

		switch (week) {
			case 1 :
				if (chiweek == 5 || chiweek == 6 || chiweek==7 ){
					if (first_chiweek == 5 || first_chiweek == 6 || first_chiweek==7 ){
						rtn = df.format(first_pre_day).substring(0,4)+"-"+df.format(first_pre_day).substring(5,7)+";"+first_pre_week;
					}else{
						rtn = df.format(pre_day).substring(0,4)+"-"+df.format(pre_day).substring(5,7)+";"+pre_week;
					}
				}else{
					rtn = date_temp.substring(0,7)+";"+week;
				}
				break;
			case 2 :
			case 3 :
			case 4 :
				if (first_chiweek == 5 || first_chiweek == 6 || first_chiweek==7 ){
					int week_temp = week - 1;
					rtn = date_temp.substring(0,7)+";"+week_temp;
				}else{
					rtn = date_temp.substring(0,7)+";"+week;
				}
				break;
			case 5 :
				if (week !=last_week){
					if (first_chiweek == 5 || first_chiweek == 6 || first_chiweek==7 ){
						int week_temp = week - 1;
						rtn = date_temp.substring(0,7)+";"+week_temp;
					}else{
						rtn = date_temp.substring(0,7)+";"+week;
					}
				}else{
					if (last_chiweek == 2 || last_chiweek == 3){
						rtn = df.format(next_month_day).substring(0,4)+"-"+df.format(next_month_day).substring(5,7)+";"+"1";
					}else{
						rtn = date_temp.substring(0,7)+";"+week;
					}
				}  
				break;
			case 6 :
				if (chiweek == 1 || chiweek == 2 || chiweek==3 ){
					rtn = df.format(next_month_day).substring(0,4)+"-"+df.format(next_month_day).substring(5,7)+";"+"1";
				}else{
					rtn = date_temp.substring(0,7)+";"+week;
				}
				break;
		}
		return rtn;
	}

	/**
	 * 获得指定日期是本月的第几周,区分划分到上月和下月的周
	 * @throws ParseException author zmx 2006.04.01
	 */
	public static int getWeekOfCurrentMonth(Date date){	
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
		String date_temp= df.format(date);
		int rtn = 0;
		
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		int week = cal.get(Calendar.WEEK_OF_MONTH);//当前周
		int chiweek = cal.get(Calendar.DAY_OF_WEEK);//当前星期
		
		Date pre_day = getRelDate(date,-1);//当前日期前一天
		cal.setTime(pre_day);		
		int pre_week = cal.get(Calendar.WEEK_OF_MONTH);	//前一天周	
		
		String lastday_temp =  getLastDate(Integer.valueOf(date_temp.substring(0,4)).intValue(),Integer.valueOf(date_temp.substring(5,7)).intValue());
		String lastday = lastday_temp.substring(0,4)+"-"+lastday_temp.substring(5,7)+"-"+lastday_temp.substring(8,10);
		Date last_day=null;
		try {
			last_day = df.parse(lastday);//本月最后一天
		} catch (ParseException e) {
			e.printStackTrace();
		}
		cal.setTime(last_day);		
		int last_week = cal.get(Calendar.WEEK_OF_MONTH);//最后一天周
		int last_chiweek = cal.get(Calendar.DAY_OF_WEEK);//最后一天星期
		
		Date next_month_day = getRelDate(last_day,1);//本月最后一天的下一天,即下月初第一天
		
		String firstday = date_temp.substring(0,8)+"01";
		Date first_day=null;
		try {
			first_day = df.parse(firstday);//本月第一天
		} catch (ParseException e) {
			e.printStackTrace();
		}
		cal.setTime(first_day);		
		int first_chiweek = cal.get(Calendar.DAY_OF_WEEK);//本月第一天星期
		
		Date first_pre_day = getRelDate(first_day,-1);//本月第一天前一天
		cal.setTime(first_pre_day);		
		int first_pre_week = cal.get(Calendar.WEEK_OF_MONTH);	//本月第一天前一天周	
		
		switch (week) {
			case 1 :
				if (chiweek == 5 || chiweek == 6 || chiweek==7 ){
					if (first_chiweek == 5 || first_chiweek == 6 || first_chiweek==7 ){
						rtn = first_pre_week;
					}else{
						rtn = pre_week;
					}
				}else{
					rtn = week;
				}
				break;
			case 2 :
			case 3 :
			case 4 :
				if (first_chiweek == 5 || first_chiweek == 6 || first_chiweek==7 ){
					int week_temp = week - 1;
					rtn = week_temp;
				}else{
					rtn = week;
				}
				break;
			case 5 :
				if (week !=last_week){
					if (first_chiweek == 5 || first_chiweek == 6 || first_chiweek==7 ){
						rtn = week - 1;
					}else{
						rtn = week;
					}
				}else{
					if (last_chiweek == 2 || last_chiweek == 3){
						rtn = 1;
					}else{
						rtn = week;
					}
				}
				break;
			case 6 :
				if (chiweek == 1 || chiweek == 2 || chiweek==3 ){
					rtn = 1;
				}else{
					rtn = week;
				}
				break;
		}
		return rtn;
	}
}