在java中将XML文件转换为CSV

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.List;

public class XMLtoCSVConverter {
    public static void main(String[] args) {
        try {
            // 创建JAXB上下文
            JAXBContext jaxbContext = JAXBContext.newInstance(Data.class);

            // 创建Unmarshaller
            Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();

            // 解析XML文件并将其转换为Java对象
            Data data = (Data) jaxbUnmarshaller.unmarshal(new File("input.xml"));

            // 将Java对象转换为CSV格式的数据
            StringBuilder csvData = new StringBuilder();
            List<Record> records = data.getRecords();
            for (Record record : records) {
                csvData.append(record.getField1()).append(",").append(record.getField2()).append("\n");
            }

            // 将CSV数据写入文件
            FileWriter writer = new FileWriter("output.csv");
            writer.write(csvData.toString());
            writer.close();

            System.out.println("XML转换为CSV成功！");
        } catch (JAXBException | IOException e) {
            e.printStackTrace();
        }
    }
}

<data>
    <record>
        <field1>Value 1</field1>
        <field2>Value 2</field2>
    </record>
    <record>
        <field1>Value 3</field1>
        <field2>Value 4</field2>
    </record>
    ...
</data>