java¶ÁÈ¡xml(Èý)

public static void main(String[] args) {

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder db = dbf.newDocumentBuilder();
//¼ÓÔØstudents.xmlÎļþ
Document doc = db.parse(new File("bin/students.xml"));

//´´½¨½Úµã
Element eltStu = doc.createElement("student");
Element eltName = doc.createElement("name");
Element eltAge = doc.createElement("age");

//´´½¨Îı¾½Úµã
Text txtName = doc.createTextNode("ÍõÎå");
Text txtAge = doc.createTextNode("50");

//ÔÚnameºÍage½ÚµãÄÚ²¿×·¼ÓÎı¾½Úµã
eltName.appendChild(txtName);
eltAge.appendChild(txtAge);

//°ÑnameºÍage½Úµã×·¼Óµ½studen½Úµã
eltStu.appendChild(eltName);
eltStu.appendChild(eltAge);

//ÉèÖÃstudent½ÚµãµÄÊôÐÔ
eltStu.setAttribute("id", "03");

//»ñÈ¡¸ù½Úµã
Element root = doc.getDocumentElement();
//°Ñstudent½Úµã×·¼Óµ½¸ù½ÚµãÄÚ²¿
root.appendChild(eltStu);
//»ñÈ¡ÄÚ²¿ËùÓеÄstudentµÄ½Úµã
NodeList nodes = root.getElementsByTagName("student");
// ɾ³ýµÚstudentÒ»¸ö½Úµã
root.removeChild(nodes.item(0));

//Ð޸Ľڵã,ÒòΪÔÚÇ°Ãæɾ³ýÁËÒ»¸ö½Úµã,NodeList¼¯ºÏÖÐҲͬʱ¸üÐÂ
Element eltCha = (Element) nodes.item(0);
//ÐÞ¸ÄageÊôÐÔÖеÄÎı¾Öµ
Node nodeAge = eltCha.getElementsByTagName("age").item(0);
//
nodeAge.getFirstChild().setNodeValue("1500");

// ÓÃÓÚ´´½¨Transofrmer¶ÔÏó
TransformerFactory tff = TransformerFactory.newInstance();
Transformer tf = tff.newTransformer();
tf.setOutputProperty("encoding", "utf-8");
// ÒÔ Document Object Model£¨DOM£©Ê÷µÄÐÎʽ³äµ±×ª»» Source Ê÷µÄ³ÖÓÐÕß¡£
DOMSource source = new DOMSource(doc);
// ³äµ±×ª»»½á¹ûµÄ³ÖÓÐÕߣ¬¿ÉÒÔΪ XML¡¢´¿Îı¾¡¢HTML »òijЩÆäËû¸ñʽµÄ±ê¼Ç¡£
StreamResult result = new StreamResult(new File("src/convert.xml"));
// ½« XML Source ת»»Îª Result
tf.transform(source, result);
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXEx