XmlPath根据条件子属性选择父属性列表到字符串列表中

Question

给出以下XML：

<Holiday ItineraryId="123456789" Country="ES" NumberOfNights="7" LeadInPricePerPassenger="447.3" FlightOnly="true" OneWayOnly="false" Currency="GBP" BookingChannel="WEB" PassengerIdRequired="false" PassengerIdMandatory="false" NationalityRequired="false" NationalityMandatory="false">
   <Flight OriginAirport="LGW" DestinationAirport="ALC" MultiLegOutboundFlight="true">
      <OutboundSubSegments DeparturePoint="LGW" DepartureDate="20180802" DepartureTime="0920" ArrivalPoint="OSL" ArrivalDate="20180802" ArrivalTime="1225" OperatingCarrier="DY" OperatedBy="Super Air Shuttle" FlightNumber="HY637" OriginAirportName="London Gatwick" DestinationAirportName="Oslo" />
   </Flight>
</Holiday>

<Holiday ItineraryId="9283873737" Country="ES" NumberOfNights="7" LeadInPricePerPassenger="447.3" FlightOnly="true" OneWayOnly="false" Currency="GBP" BookingChannel="WEB" PassengerIdRequired="false" PassengerIdMandatory="false" NationalityRequired="false" NationalityMandatory="false">
   <Flight OriginAirport="LGW" DestinationAirport="ALC" MultiLegOutboundFlight="true">
      <OutboundSubSegments DeparturePoint="LGW" DepartureDate="20180802" DepartureTime="0920" ArrivalPoint="OSL" ArrivalDate="20180802" ArrivalTime="1225" OperatingCarrier="DY" OperatedBy="Super Air Shuttle" FlightNumber="HY637" OriginAirportName="London Gatwick" DestinationAirportName="Oslo" />
   </Flight>
</Holiday>

<Holiday ItineraryId="894847463" Country="ES" NumberOfNights="7" LeadInPricePerPassenger="447.3" FlightOnly="true" OneWayOnly="false" Currency="GBP" BookingChannel="WEB" PassengerIdRequired="false" PassengerIdMandatory="false" NationalityRequired="false" NationalityMandatory="false">
   <Flight OriginAirport="LGW" DestinationAirport="ALC" MultiLegOutboundFlight="true">
      <OutboundSubSegments DeparturePoint="LGW" DepartureDate="20180802" DepartureTime="0920" ArrivalPoint="OSL" ArrivalDate="20180802" ArrivalTime="1225" OperatingCarrier="DY" OperatedBy="Super Air Shuttle" FlightNumber="HY637" OriginAirportName="London Gatwick" DestinationAirportName="Oslo" />
  </Flight>
</Holiday>

<Holiday ItineraryId="894847463" Country="ES" NumberOfNights="7" LeadInPricePerPassenger="447.3" FlightOnly="true" OneWayOnly="false" Currency="GBP" BookingChannel="WEB" PassengerIdRequired="false" PassengerIdMandatory="false" NationalityRequired="false" NationalityMandatory="false">
   <Flight OriginAirport="LGW" DestinationAirport="ALC" MultiLegOutboundFlight="false">
      <OutboundSubSegments DeparturePoint="LGW" DepartureDate="20180802" DepartureTime="0920" ArrivalPoint="OSL" ArrivalDate="20180802" ArrivalTime="1225" OperatingCarrier="DY" OperatedBy="Super Air Shuttle" FlightNumber="HY637" OriginAirportName="London Gatwick" DestinationAirportName="Oslo" />
  </Flight>
</Holiday>

如何在满足条件MultiLegOutboundFlight =“true”的字符串列表中选择所有的行程ID？

我试过了：

allMultiLegPackages = response.xmlPath().getList("Holiday.Flight{it.@MultiLegOutboundFlight=='true'}//parent::Holiday");

...这会成功返回符合条件的节点列表。但是如何获得ItineraryId的属性列表呢？

Answer 1

希望这个片段能帮到你。

XmlPath xmlpath = new XmlPath(responseXML);
List<Node> holidayNodes = xmlpath.getList("Holidays.Holiday.findAll{it.Flight.@MultiLegOutboundFlight=='true'}");
List<String> itineraryList = new ArrayList<>();
for(Node node: holidayNodes){
itineraryList.add(node.getAttribute("ItineraryId"));
}
System.out.println(itineraryList);

您的XML响应似乎有多个根节点Holiday。我想我们应该只有一个根节点。在一个根节点Holidays中声明所有Holiday节点

Answer 2

假设您的XmlPath表达式有效，我认为您只需要将“/ @ ItineraryId”添加到它的末尾......所以类似于：

allMultiLegPackages =
response.xmlPath().getList("Holiday.Flight{it.@MultiLegOutboundFlight=='true'}//parent::Holiday/@ItineraryId");