java - 如何使用 JDOM 读取 XML

Question

如何获取该标签的值

<executingChannel><mnemonic>8</mnemonic></executingChannel>

在此 XML 中使用 JDOM

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope">
<SOAP-ENV:Header xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope">
<md:metadata xmlns:md="http://www.teste.net/cmm/services/metadata/v2.0">
    <serviceId>calculateEntityCache_Version_From_List</serviceId>
    <serviceVersion>1.0</serviceVersion>
    <institutionType>UNDEFINED</institutionType>
    <targetChannel>
    <mnemonic>8</mnemonic>
    </targetChannel>        
    <executingChannel>
    <mnemonic>8</mnemonic>
    </executingChannel>

>

Answer 1

在 JDOM 中，您可以使用以下命令将文档读入内存:

SAXBuilder builder = new SAXBuilder();
Document doc = builder.build(source of XML ... URL, file, etc.);
Namespace md = Namespace.get("md",
         "http://www.teste.net/cmm/services/metadata/v2.0");

然后，您可以使用以下方式查询文档:

String path = "//md:metadata/executingChannel/mnemonic";
XPathExpression<Element> xp = XPathFactory.instance()
       .compile(path, Filters.element(), null, md);
Element mnemonic = xp.evaluateFirst(doc);
System.out.println(mnemonic.getText());