使用Java中的命名空间创建XML文档

Question

我正在寻找可以构造使用命名空间的XML文档的示例Java代码.我似乎无法使用我喜欢的常用工具找到任何东西,所以希望有人可以帮助我.

Answer 1

有很多方法可以做到这一点.只是几个例子:

使用XOM

import nu.xom.Document;
import nu.xom.Element;

public class XomTest {

    public static void main(String[] args) {
        XomTest xomTest = new XomTest();
        xomTest.testXmlDocumentWithNamespaces();
    }

    private void testXmlDocumentWithNamespaces() {
        Element root = new Element("my:example", "urn:example.namespace");
        Document document = new Document(root);
        Element element = new Element("element", "http://another.namespace");
        root.appendChild(element);
        System.out.print(document.toXML());
    }
}

使用W3C DOM的 Java实现

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSOutput;
import org.w3c.dom.ls.LSSerializer;

public class DomTest {

    private static DocumentBuilderFactory dbf = DocumentBuilderFactory
            .newInstance();

    public static void main(String[] args) throws Exception {
        DomTest domTest = new DomTest();
        domTest.testXmlDocumentWithNamespaces();
    }

    public void testXmlDocumentWithNamespaces() throws Exception {
        DocumentBuilder db = dbf.newDocumentBuilder();
        DOMImplementation domImpl = db.getDOMImplementation();
        Document document = buildExampleDocumentWithNamespaces(domImpl);
        serialize(domImpl, document);
    }

    private Document buildExampleDocumentWithNamespaces(
            DOMImplementation domImpl) {
        Document document = domImpl.createDocument("urn:example.namespace",
                "my:example", null);
        Element element = document.createElementNS("http://another.namespace",
                "element");
        document.getDocumentElement().appendChild(element);
        return document;
    }

    private void serialize(DOMImplementation domImpl, Document document) {
        DOMImplementationLS ls = (DOMImplementationLS) domImpl;
        LSSerializer lss = ls.createLSSerializer();
        LSOutput lso = ls.createLSOutput();
        lso.setByteStream(System.out);
        lss.write(document, lso);
    }
}

Answer 2

我不确定,你想做什么,但我使用jdom来解决大多数xml问题,它支持命名空间(当然).

代码:

Document doc = new Document();
Namespace sNS = Namespace.getNamespace("someNS", "someNamespace");
Element element = new Element("SomeElement", sNS);
element.setAttribute("someKey", "someValue", Namespace.getNamespace("someONS", "someOtherNamespace"));
Element element2 = new Element("SomeElement", Namespace.getNamespace("someNS", "someNamespace"));
element2.setAttribute("someKey", "someValue", sNS);
element.addContent(element2);
doc.addContent(element);

生成以下xml:

<?xml version="1.0" encoding="UTF-8"?>
 <someNS:SomeElement xmlns:someNS="someNamespace" xmlns:someONS="someOtherNamespace"  someONS:someKey="someValue">
  <someNS:SomeElement someNS:someKey="someValue" />
 </someNS:SomeElement>

哪个应该包含你需要的一切.希望有所帮助.