使用命名空间将字符串解析为 org.w3c.dom.Document

Question

如何从包含 XML 的字符串创建文档？

我已尝试以下代码，但 document.getElementsByTagNameNS("Envelope", "http://schemas.xmlsoap.org/soap/envelope/") 函数调用未找到任何 XML 元素。

String xml = "<soapenv:Envelope\n" +
        "        xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\">\n" +
        "\t<soapenv:Header>\n" +
        "\t</soapenv:Header>\n" +
        "\t<soapenv:Body>\n" +
        "\t</soapenv:Body>\n" +
        "</soapenv:Envelope>";

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder;
try {
    factory.setNamespaceAware(true);
    builder = factory.newDocumentBuilder();
    Document document = builder.parse(new InputSource(new StringReader(xml)));
    System.out.println(document.getElementsByTagNameNS("Envelope", "http://schemas.xmlsoap.org/soap/envelope/").getLength());
} catch (Exception e) {
    e.printStackTrace();
}

Answer 1

根据文档，

NodeList getElementsByTagNameNS(String namespaceURI, String localName)

以下将起作用，

System.out.println(document.getElementsByTagNameNS("http://schemas.xmlsoap.org/soap/envelope/", "Envelope").getLength());