如何创建 XML 标头答案

【问题标题】：ho to create XML header如何创建 XML 标头
【发布时间】：2017-01-29 11:19:55
【问题描述】：

请问如何在 Java 中创建这样的 xml 标头。

<cfg:configuration xmlns:xsi="http://www.w3.org/2001/XMLSchema-
    instance" xmlns:ContentRouter="http://company/ContentRouter-3.0" 
    xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:cfg="http://company/configuration">.

我正在使用DocumentBuilderFactory，我的 xml 看起来很相似，但有点不同..

我的代码：

Element rootElement = doc.createElement("cfg:configuration");
Attr attr1 = doc.createAttribute("xmlns:xsi");
attr1.setValue("http://www.w3.org/2001/XMLSchema-instance");
Attr attr2 = doc.createAttribute("xmlns:ContentRoute");
attr2.setValue("http://eurotel/ContentRouter-3.0");
Attr attr3 = doc.createAttribute("xmlns:xs");
attr3.setValue("http://www.w3.org/2001/XMLSchema");
Attr attr4 = doc.createAttribute("xmlns:cfg");
attr4.setValue("http://eurotel/configuration");

感谢您的帮助！

【问题讨论】：

标签： java xml

【解决方案1】：

你可以这样做

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

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

public class RegexTest {
    private static DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

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

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

    private Document addNameSpaces(DOMImplementation domImpl) {
        Document document = domImpl.createDocument("http://company/configuration", "cfg:configuration", null);
        document.getDocumentElement().setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:ContentRouter", "http://company/ContentRouter-3.0");
        document.getDocumentElement().setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:xs", "http://www.w3.org/2001/XMLSchema");
        document.getDocumentElement().setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");

        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);
    }

}

打印：

<?xml version="1.0" encoding="UTF-8"?>
<cfg:configuration xmlns:cfg="http://company/configuration" xmlns:ContentRouter="http://company/ContentRouter-3.0" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>

附：引用this和this

【讨论】：