java获取当前系统前一天，当天，后天日期

获取当前系统前一天日期

public static Date getNextDay(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		calendar.add(Calendar.DAY_OF_MONTH, -1);
		date = calendar.getTime();
		return date;
	}

获取当前系统当天日期

public static Date getNextDay(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		calendar.add(Calendar.DAY_OF_MONTH, 0);
		date = calendar.getTime();
		return date;
	}

获取当前系统下一天日期

public static Date getNextDay(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		calendar.add(Calendar.DAY_OF_MONTH, -1);
		date = calendar.getTime();
		return date;
	}