java创建xml文件

import java.io.File;
import java.io.PrintWriter;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
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;

public class CreateXML {

    /**
     * @param args
     * @throws Exception 
     * @throws ParserConfigurationException 
     */
    public static void main(String[] args) throws ParserConfigurationException, Exception {
        // TODO Auto-generated method stub
    	//创建xml文件并选择输出路径
       createXML("D:\\employees.xml");
    }

    static Document document = null;
    
    static void createXML(String filename) throws ParserConfigurationException, Exception{
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
        document = documentBuilder.newDocument();
        //创建根节点
        Element root = document.createElement("employees");
        document.appendChild(root);
        Element employee = document.createElement("employee");
        Element name = document.createElement("name");
        //textNode只有document能创建
        name.appendChild(document.createTextNode("阿黄"));
        employee.appendChild(name);
        //创建子节点
        Element sex = document.createElement("sex");
        sex.appendChild(document.createTextNode("不男不女"));
        employee.appendChild(sex);
        
        Element age =document.createElement("age");
        age.appendChild(document.createTextNode("13"));
        employee.appendChild(age);
        
        root.appendChild(employee);
        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer transformer = tf.newTransformer();
        
        DOMSource source = new DOMSource(document);
        //设置编码格式
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        //缩进指定是否可能增加额外的空格当输出结果树,这个值必须是或不是
        transformer.setOutputProperty(OutputKeys.INDENT,"yes");
        PrintWriter pw = new PrintWriter(new File(filename));
        StreamResult streamResult = new StreamResult(pw);
        transformer.transform(source,streamResult);
    }
}