以下に示すように:
$.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; } });