Question

这是我的XML

 <?xml version="1.0" encoding="UTF-8"?>
  <Pport xmlns="http://www.thalesgroup.com/rtti/PushPort/v12" xmlns:ns3="http://www.thalesgroup.com/rtti/PushPort/Forecasts/v2" ts="2016-07-26T20:51:30.9941484+01:00" version="12.0">
   <uR updateOrigin="TD">
    <TS rid="201607264120116" ssd="2016-07-26" uid="W44875">
     <ns3:Location tpl="LEEE" wtp="21:00:30">
      <ns3:pass et="20:57" src="TD"/>
      <ns3:plat cisPlatsup="true" platsrc="A" platsup="true">1</ns3:plat>
     </ns3:Location>
    <ns3:Location tpl="LEESPRJ" wtp="21:02:30">
     <ns3:pass et="20:59" src="Darwin"/>
    </ns3:Location>
    <ns3:Location tpl="GRVPDCE" wtp="21:15:30">
     <ns3:pass et="21:12" src="Darwin"/>
    </ns3:Location>
    <ns3:Location tpl="GRVPCSD" wta="21:21">
     <ns3:arr et="21:17" src="Darwin"/>
     <ns3:pass et="20:59" src="Darwin"/>
    </ns3:Location>
   </TS>
  </uR>
 </Pport>

以下是我的代码的一部分：

try {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setNamespaceAware(true);
    DocumentBuilder builder = factory.newDocumentBuilder();
    InputSource is = new InputSource(new StringReader(xml));
    Document doc = builder.parse(is);

    doc.getDocumentElement().normalize();
    System.out.println("Root Element : " + doc.getDocumentElement().getNodeName());

    NodeList nList = doc.getElementsByTagNameNS(
        "http://www.thalesgroup.com/rtti/PushPort/Forecasts/v2", "Location");
    int totalBooks = nList.getLength();
    System.out.println(totalBooks);

    for (int i = 0; i < nList.getLength(); i++) {
        Node nNode = nList.item(i);
        if (nNode.getNodeType() == Node.ELEMENT_NODE) {
            Element eElement = (Element) nNode;
            System.out.println(eElement.getAttribute("tpl"));

            String tpl = eElement.getAttribute("tpl");
            String pta = eElement.getAttribute("pta");
            String ptd = eElement.getAttribute("ptd");
            String wta = eElement.getAttribute("wta");
            String wtd = eElement.getAttribute("wtd");

            //New Code 2
            System.out.println(eElement.getElementsByTagNameNS(
                "http://www.thalesgroup.com/rtti/PushPort/Forecasts/v2","arr").getAttribute("et"));

            String query = "insert into darwinall (tpl,timestamp,pta,ptd,wta,wtd)"
            + "values(?,?,?,?,?,?)";
            try {
                PreparedStatement preparedStmt = connectOut.connect().prepareStatement(query);
                preparedStmt.setString(1, tpl);
                preparedStmt.setInt(2, 123456);
                preparedStmt.setString(3, pta);
                preparedStmt.setString(4, ptd);
                preparedStmt.setString(5, wta);
                preparedStmt.setString(6, wtd);

                preparedStmt.execute();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
} catch (Exception ex) {
    ex.printStackTrace();
}

我可以成功获取属性tpl，pta，ptd，wta和wtd。但是，我无法在节点名称空间 ns3：arr 中获取＆＃34; et＆＃34; 的属性。我不想得到＆＃34; et＆＃34;在 ns3：传递之内。我追求的答案是21.17。我骑自行车穿过ns3：Location节点。出现故障的代码片段在//新代码2下。我收到一个错误说明...方法getAttribute（String）未定义类型NodeList。任何帮助表示赞赏

Answer 1

你几乎就在那里。 Element.getElementsByTagNameNS()会返回NodeList，而非Element。因此，您必须以迭代Location节点的方式迭代它：

String tpl = eElement.getAttribute("tpl");
String pta = eElement.getAttribute("pta");
String ptd = eElement.getAttribute("ptd");
String wta = eElement.getAttribute("wta");
String wtd = eElement.getAttribute("wtd");
String et  = "";

NodeList nArrList = eElement.getElementsByTagNameNS(
         "http://www.thalesgroup.com/rtti/PushPort/Forecasts/v2", "arr");

for (int k = 0; k < nArrList.getLength(); k++) {
    Node innerNode = nArrList.item(k);
    if (innerNode.getNodeType() == Node.ELEMENT_NODE) {
        Element innerElt = (Element) innerNode;
        et = innerElt.getAttribute("et");
    }
}

/* Do database stuff... */

使用Java解析XML尝试在命名空间Childnode上获取属性

1 个答案: