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java如何导出xml文件

2026-02-05 08:13:02Java

使用DOM4J导出XML文件

DOM4J是一个流行的Java库，用于处理XML文档。以下是一个示例代码，展示如何使用DOM4J创建并导出XML文件。

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.XMLWriter;
import java.io.FileWriter;

public class Dom4jExample {
    public static void main(String[] args) {
        try {
            Document document = DocumentHelper.createDocument();
            Element root = document.addElement("root");

            Element child = root.addElement("child");
            child.addAttribute("name", "value");
            child.setText("This is a sample text");

            XMLWriter writer = new XMLWriter(new FileWriter("output.xml"));
            writer.write(document);
            writer.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

使用JDK内置的JAXP导出XML文件

Java标准库提供了JAXP（Java API for XML Processing）用于处理XML。以下是使用JAXP的示例代码。

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import java.io.File;

public class JaxpExample {
    public static void main(String[] args) {
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document document = builder.newDocument();

            Element root = document.createElement("root");
            document.appendChild(root);

            Element child = document.createElement("child");
            child.setAttribute("name", "value");
            child.setTextContent("This is a sample text");
            root.appendChild(child);

            Transformer transformer = TransformerFactory.newInstance().newTransformer();
            DOMSource source = new DOMSource(document);
            StreamResult result = new StreamResult(new File("output.xml"));
            transformer.transform(source, result);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

使用XStream导出XML文件

XStream是一个简单的库，可以将Java对象序列化为XML。以下是示例代码。

import com.thoughtworks.xstream.XStream;
import java.io.FileWriter;

public class XStreamExample {
    public static void main(String[] args) {
        try {
            XStream xstream = new XStream();
            String xml = xstream.toXML(new SampleObject("value", "This is a sample text"));

            FileWriter writer = new FileWriter("output.xml");
            writer.write(xml);
            writer.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    static class SampleObject {
        String name;
        String text;

        public SampleObject(String name, String text) {
            this.name = name;
            this.text = text;
        }
    }
}

使用StAX导出XML文件

StAX（Streaming API for XML）是一种基于流的XML处理方式。以下是使用StAX导出XML的示例代码。

import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamWriter;
import java.io.FileWriter;

public class StaxExample {
    public static void main(String[] args) {
        try {
            XMLOutputFactory factory = XMLOutputFactory.newInstance();
            XMLStreamWriter writer = factory.createXMLStreamWriter(new FileWriter("output.xml"));

            writer.writeStartDocument();
            writer.writeStartElement("root");

            writer.writeStartElement("child");
            writer.writeAttribute("name", "value");
            writer.writeCharacters("This is a sample text");
            writer.writeEndElement();

            writer.writeEndElement();
            writer.writeEndDocument();
            writer.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}