Java 写xml文件

[java]
package com.biztool;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
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 org.w3c.dom.Text;

public class WriteXml {
    private void writeXMLFile(String xmlfile) {
        File file = new File("E:/tryfile/xml");
        file.listFiles();
        if(!file.exists()) {

            file.mkdirs();
        }
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder dbuilder = null;
        try {
            dbuilder = dbf.newDocumentBuilder();
        }catch(Exception ex) {
            ex.printStackTrace();
        }

        Document doc = dbuilder.newDocument();

        Element root = doc.createElement("学生花名册");
        doc.appendChild(root);

        Element stu = doc.createElement("学生");
        stu.setAttribute("性别","男");
        root.appendChild(stu);

        Element stu_name = doc.createElement("姓名");
        stu.appendChild(stu_name);
        Text name_text = doc.createTextNode("罗文雯");
        stu_name.appendChild(name_text);

        Element stu_age = doc.createElement("年龄");
        stu.appendChild(stu_age);
        Text age_text = doc.createTextNode("25");
        stu_age.appendChild(age_text);
        try {
            FileOutputStream fos = new FileOutputStream(xmlfile+"/test.xml");
            OutputStreamWriter osw = new OutputStreamWriter(fos);
            callDomWriter(doc, osw, "UTF-8");
            osw.close();
            fos.close();
        }catch(Exception ex) {
            ex.printStackTrace();
        }


    }

    public void callDomWriter(Document dom , Writer writer, String encoding) {
        try {

            Source source = new DOMSource(dom);
            Result res = new StreamResult(writer);
            Transformer xformer = TransformerFactory.newInstance().newTransformer();
            xformer.setOutputProperty(OutputKeys.ENCODING, encoding);
            xformer.transform(source, res);
        }catch (TransformerConfigurationException e) {
               e.printStackTrace();
          } catch (TransformerException e) {
           e.printStackTrace();
          }

    }

    public static void main(String []args) {
        WriteXml writeins = new WriteXml();
        String outfile = "E:/tryfile/xml";
        writeins.writeXMLFile(outfile);
        System.out.println("finished");
    }
}

补充：软件开发 , Java ,