jquery ajax后台返回list，前台用jquery遍历list

$.ajax({   
        type: 'post',   
        url: "maintain_findRoomByBuildingId.shtml",   
        cache: false,   
        data: {"buildingId":buildingId},   
        dataType: 'json',   
        success: function(data){   
            jQuery.each(data.roomList, function(i,item){   
                alert(item.id+","+item.name);   
            });   
        },   
        error: function(){   
            return;   
        }   
    });