dom4j 创建一个带命名空间的pom.xml 文件

http://xml.apache.org/xalan-j/index.html

需要的jar包

    <dependencies>
        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1</version>
        </dependency>
        <dependency>
            <groupId>xalan</groupId>
            <artifactId>xalan</artifactId>
            <version>2.7.2</version>
        </dependency>
    </dependencies>

示例

import java.io.IOException;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.apache.xml.serializer.OutputPropertiesFactory;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentFactory;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Namespace;
import org.dom4j.QName;
import org.dom4j.io.DOMWriter;

public class Dom4jDemo {

    public static void main(String[] args) throws IOException, TransformerFactoryConfigurationError, DocumentException, TransformerException    {

        DocumentFactory documentFactory = DocumentFactory.getInstance();

        Document document = documentFactory.createDocument();
        Element projectElement = DocumentHelper.createElement("project");
        Namespace noprefix = Namespace.get("http://maven.apache.org/POM/4.0.0");
        Namespace xsi = Namespace.get("xsi", "http://www.w3.org/2001/XMLSchema-instance");
        projectElement.add(noprefix);
        projectElement.add(xsi);
        projectElement.addAttribute(QName.get("schemaLocation", xsi), "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd");

        Element modelVersionElement = projectElement.addElement("modelVersion",noprefix.getURI());
        modelVersionElement.addText("4.0.0");

        Element groupIdElement = projectElement.addElement("groupId",noprefix.getURI());
        groupIdElement.addText("cn.zno");

        Element artifactIdElement = projectElement.addElement("artifactId",noprefix.getURI());
        artifactIdElement.addText("z-test");

        Element versionElement = projectElement.addElement("version", noprefix.getURI());
        versionElement.addText("0.0.1-SNAPSHOT");

        document.setRootElement(projectElement);

        StringWriter stringWriter = new StringWriter();
        document.write(stringWriter);

        String onelineContent = stringWriter.toString().replaceAll(">\\s*<", "><");

        String xalanVersion = org.apache.xalan.Version.getVersion();

        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty(OutputPropertiesFactory.S_KEY_INDENT_AMOUNT, "4");
        DOMSource domSource = new DOMSource(new DOMWriter().write(DocumentHelper.parseText(onelineContent)));
        StreamResult streamResult = new StreamResult(new StringWriter());
        transformer.transform(domSource, streamResult);
        String transformedXmlContent = streamResult.getWriter().toString();

        System.out.println(transformedXmlContent);
    }
}

运行结果

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>cn.zno</groupId>
    <artifactId>z-test</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</project>

PS：

1） org.dom4j.DocumentFactory  新建 document  ， javax.xml.parsers.DocumentBuilderFactory  也是新建 document

2）org.dom4j.DocumentHelper 是 易使用版 ，包含创建新的和创建已存在的

3）org.dom4j.io.SAXReader 可方便读取已有document

4） javax.xml.transform.Transformer 部分是java 的，正宗地址  http://xalan.apache.org/index.html