转换XML不起作用UTF-8 XMLOutputter Java

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.output.Format;
import org.jdom2.output.XMLOutputter;

public class XMLConverter {
    public static void main(String[] args) {
        // 创建XML文档
        Element rootElement = new Element("root");
        Document doc = new Document(rootElement);

        // 添加元素和内容
        Element childElement = new Element("child");
        childElement.setText("Hello, World!");
        rootElement.addContent(childElement);

        // 创建XMLOutputter对象
        XMLOutputter xmlOutputter = new XMLOutputter();

        // 设置格式化输出
        Format format = Format.getPrettyFormat();
        format.setEncoding("UTF-8");
        xmlOutputter.setFormat(format);

        try {
            // 输出XML到控制台
            xmlOutputter.output(doc, System.out);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}