通过JAVA写数据到XML里面

<<persons.xml>>
<?xml version="1.0" encoding="UTF-8"?>
<persons>
	<person>
		<name>andy</name>
		<age>45</age>
		<tel>13632940025</tel>
		<sex>m</sex>
	</person>
</persons>
<<WriteXmlTest.xml>>
package test.xml;
import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
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.NodeList;
import org.w3c.dom.Text;
import org.xml.sax.SAXException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
public class WriteXmlTest {
	public static void main(String[] args) {
		try {
			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			DocumentBuilder db = dbf.newDocumentBuilder();
			Document dc = db.parse("persons.xml");
			fang(dc);
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public static void fang(Document doc) {
		Element eleroots = doc.getDocumentElement();

		Element eleroot = doc.createElement("person");// 创建gen元素
		eleroots.appendChild(eleroot);
		Element elename = doc.createElement("name");

		Text text1 = doc.createTextNode("andy");
		elename.appendChild(text1);
		eleroot.appendChild(elename);

		Element eleage = doc.createElement("age");
		Text text2 = doc.createTextNode("45");
		eleage.appendChild(text2);
		eleroot.appendChild(eleage);

		Element eletel = doc.createElement("tel");
		Text text3 = doc.createTextNode("13632940025");
		eletel.appendChild(text3);
		eleroot.appendChild(eletel);

		Element elesex = doc.createElement("sex");
		Text text4 = doc.createTextNode("m");
		elesex.appendChild(text4);
		eleroot.appendChild(elesex);

		TransformerFactory tff = TransformerFactory.newInstance();
		Transformer tf = null;
		try {
			tf = tff.newTransformer();
		} catch (TransformerConfigurationException e) {
			e.printStackTrace();
		}
		DOMSource ds = new DOMSource(doc);
		StreamResult sr = new StreamResult(new File("persons.xml"));
		try {
			tf.transform(ds, sr);
		} catch (TransformerException e) {
			e.printStackTrace();
		}
	}
}