我正在尝试从特定元素读取信息，这是我的xml有效负载：

<?xml version="1.0"?>
<tns:createTicket xmlns:tns="">
<contact>
    <gender>F</gender>
    <firstname>ANNE</firstname>
    <lastname>MP</lastname>
    <phone>88</phone>
  </contact>
  <issue>
    <occurrenceDate>2020-03-23T00:01:00+01:00</occurrenceDate>
    <location>
      <streetName1>Rpp</streetName1>
      <zipCode>999999</zipCode>
      <city>AMMM</city>
      <countryCode>FR</countryCode>
    </location>
    <typeCode>GAM</typeCode>

    <otherInformations>
      <name>Ser</name>
      <value>Two</value>
    </otherInformations>

    <otherInformations>
      <name>deliveryAddress</name>
      <value>RURU</value>
    </otherInformations>

    **<otherInformations>
      <name>**serDat**</name>
      <value>**2020-03-23**</value>
    </otherInformations>**

    <otherInformations>
      <name>gracias</name>
      <value>False</value>
    </otherInformations>
  </issue>
</tns:createTicket>

如何从有效负载中读取该特定元素的信息：

串口 2020-03-23

我在代码中使用了Dom库，但是我只能从第一个“ otherinformations”元素中读取信息，而不能从其他元素中读取。当我想从XML有效负载中的唯一元素读取信息时，我没有这个问题。 编辑：我已经尝试过xPath librairy

var factory = DocumentBuilderFactory.newInstance()
    var builder = factory.newDocumentBuilder()
    var document = builder.parse(new Inputsource(new StringReader(payload)));
    //var rootElement = document.getDocumentElement()
    var xpf = XPathFactory.newInstance()
    var xpath = xpf.newXPath()
    print(payload)
    var nodes = xpath.evaluate("/createTicketRequest/payload/issue/otherInformations",document,XPathConstants.NODESET) as NodeList
    for(i in 0..nodes.getLength()) {
      print(nodes.item(i).getNodeValue()); 
    }

但是print（nodes.item（i）.getNodeValue（））的结果；是NULL

谢谢您的帮助！