XPath 未读取带有命名空间的 xml 标记

Question

您好，我正在尝试读取 xml，其中定义了命名空间，并且一些标签带有命名空间。但是当我使用 XPath 读取这些标签时，命名空间标签总是给出空值。

样本XML

<?xml version="1.0" encoding="UTF-8"?>
<Employees xmlns:ULAD="http://www.datamodelextension.org/Schema/ULAD">
<EXTENSION>
    <OTHER>
        <ULAD:HMDAGenderType>Male</ULAD:HMDAGenderType>
    </OTHER>
</EXTENSION>
</Employees>

示例Java要阅读的程序ULAD:HMDAGenderType

public static void main(String args[]) throws XPathExpressionException {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
try {
  DocumentBuilder builder = factory.newDocumentBuilder();
  Document doc = builder.parse("C:\test.xml");
  XPathFactory xpathFactory = XPathFactory.newInstance();
  XPath xpath = xpathFactory.newXPath();
  XPathExpression expr = xpath.compile("/Employees/EXTENSION/OTHER/ULAD:HMDAGenderType");
  System.out.println("Gender :: " + expr.evaluate(doc, XPathConstants.STRING));
} catch (ParserConfigurationException | SAXException | IOException e) {
  e.printStackTrace();
}
}

输出::空

预期输出::男性

如何阅读此类标签？

Answer 1

尝试使用 XPath local-name()
而不是

XPathExpression expr = xpath.compile("/Employees/EXTENSION/OTHER/ULAD:HMDAGenderType");

请尝试

XPathExpression expr = xpath.compile("//*[local-name()='HMDAGenderType']");

要直接获取文本属性值，您可以使用此 XPath：

XPathExpression expr = xpath.compile("//*[local-name()='HMDAGenderType']/text()");

XPath 未读取带有命名空间的 xml 标记

XPath not reading xml tag with namespace

java

xml

xpath