Java 日期增加一天、一周、一月、三月和六月以及判断是否周末

小灰灰 2023-10-10 12:26 20阅读 0赞

1、日期增加指定日期

public String isWeekendOrHoliday(String date, Integer type) throws ParseException {
    		DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
    		Date recorDate = format.parse(date);
            // 日历对象
    		Calendar cal = Calendar.getInstance();
            // 日历对象设置Date
    		cal.setTime(recorDate);
    		switch (type) {
    		case 1:
    			// 日期添加:一周
    			cal.set(Calendar.DAY_OF_MONTH, cal.get(Calendar.DAY_OF_MONTH)+7);
    			break;
    		case 2:
    			// 日期添加:一个月
    			cal.set(Calendar.MONTH,cal.get(Calendar.MONTH)+1);
    			break;
    		case 3:
    			// 日期添加：三个月
    			cal.set(Calendar.MONTH,cal.get(Calendar.MONTH)+3);
    			break;
    		case 4:
    			// 日期添加:六个月
    			cal.set(Calendar.MONTH,cal.get(Calendar.MONTH)+6);
    			break;
    		default:
    			// 默认当天
    		}
    		if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY || cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
    			cal.set(Calendar.DATE, cal.get(Calendar.DAY_OF_MONTH)+1);
    			recorDate = cal.getTime();
    			date = format.format(recorDate);
    			return isWeekendOrHolidaySub(date);
    		}
    		recorDate = cal.getTime();
    		return format.format(recorDate);
    	}

2、判断是否周末功能代码：

public String isWeekendOrHolidaySub(String date) throws ParseException {
    		DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
    		Date recorDate = format.parse(date);
    		Calendar cal = Calendar.getInstance();
    		cal.setTime(recorDate);
    		if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY || cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
    			cal.set(Calendar.DATE, cal.get(Calendar.DAY_OF_MONTH)+1);
    			recorDate = cal.getTime();
    			date = format.format(recorDate);
    			return isWeekendOrHolidaySub(date);
    		}
    		return date;
    	}