public static Calendar round(Calendar calendar, DateField dateField) {
		return DateModifier.modify(calendar, dateField.getValue(), ModifyType.ROUND);
	}
public static Calendar round ( Calendar calendar , DateField dateField ) { return DateModifier . modify ( calendar , dateField . getValue ( ) , ModifyType . ROUND ) ; }
修改日期为某个时间字段四舍五入时间

@param calendar {@link Calendar}
@param dateField 时间字段
@return 原{@link Calendar}
@since 4.5.7