月初跟月末看当前日期所在周的周三是几月份的，就算作是几月份的周。

Map
     
       getGroupDate(@Param(value="inputDate") Date inputDate);
     

        0,date_sub(@last_sat,interval 7 day),@last_sat) last_point,    @this_point := if(day(@this_sat)-3>0,date_sub(@this_sat,interval 7 day),@this_sat) this_point,    @next_point := if(day(@next_sat)-3>0,date_sub(@next_sat,interval 7 day),@next_sat) next_point ,    case    when @cdate >= @last_point and @cdate < @this_point then    concat(    'W',    datediff(@cdate,@last_point) div 7 + 1, '/',    year(@cdate),'-',    if(month(@last_sat)>=10,month(@last_sat),concat('0',month(@last_sat)))    )    when @cdate >=@this_point and @cdate < @next_point then    concat(    'W',    datediff(@cdate,@this_point) div 7 + 1,'/',    year(@cdate),'-',    if(month(@this_sat)>=10,month(@this_sat),concat('0',month(@this_sat))))    else    concat(    'W',    datediff(@cdate,@next_point) div 7 + 1,'/',    year(@cdate),'-',if(month(@next_sat)>=10,month(@next_sat),concat('0',month(@next_sat))))    end    group_date    from  (SELECT @cdate := #{inputDate}) as gd    )；        ]]>