package wlz.xml;
import javax.xml.parsers.*;
import org.w3c.dom.*;
//import javax.xml.transform.*;
//import javax.xml.transform.dom.DOMSource;
//import javax.xml.transform.stream.StreamResult;
import java.io.*;
import org.apache.xml.serialize.*;
public class WriteXml {
??? public static void writeXml(Document doc,String filename) throws Exception{
??????? /*TransformerFactory tf=TransformerFactory.newInstance();
??????? Transformer f=tf.newTransformer();
??????? //f.setOutputProperties();
??????? DOMSource source=new DOMSource(doc);
??????? StreamResult result=new StreamResult(new File(filename));
??????? f.transform(source,result);*/
?????? ?
??????? FileOutputStream fos = new FileOutputStream(filename);
??????? OutputFormat of = new OutputFormat("XML","GB2312",true);
??????? of.setIndent(2);
??????? of.setIndenting(true);
??????? XMLSerializer serializer = new XMLSerializer(fos,of);
?????? ?
??????? serializer.asDOMSerializer();
??????? serializer.serialize(doc.getDocumentElement());
??????? fos.close();
??? }
?? ?
??? public static void outputElement(Document doc,String elementName){
??????? NodeList list= doc.getElementsByTagName(elementName);
??????? System.out.println("------------------------------------------");
??????? for(int i=0;i<list.getLength();i++){
??????????? System.out.println(elementName+"="+list.item(i).getFirstChild().getNodeValue()); //取出元素的值
??????? }
??????? System.out.println("------------------------------------------");
??? }
?? ?
??? public static void addElement(Document doc,Element root,String name,String age,String sex){
??????? Element student=doc.createElement("student");
??????? Element ename=doc.createElement("name");
??????? Element eage=doc.createElement("age");
??????? Element esex=doc.createElement("sex");
???????????? ?
??????? ename.appendChild(doc.createTextNode(name));
??????? eage.appendChild(doc.createTextNode(age));
??????? esex.appendChild(doc.createTextNode(sex));
?????? ?
??????? student.appendChild(ename);
??????? student.appendChild(eage);
??????? student.appendChild(esex);
?????? ?
??????? root.appendChild(student);
??? }
?? ?
??? public static Document createDocument() throws Exception{
??????? DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
??????? DocumentBuilder db=dbf.newDocumentBuilder();
??????? Document doc=db.newDocument();
??????? return doc;
??? }
?? ?
??? public static void main(String[] args) throws Exception{
/*
output the xml
<class name="計算機1班">
?? ?<student>
?? ??? <name>
?? ??? <age>
?? ??? <sex>
??? </student>
??? <student>
?????? <name>
?????? <age>
?????? <sex>
??? </student>
</class>
?*/?? ?
??????? Document doc=createDocument();
??????? doc.createProcessingInstruction("encoding","gb2312");
??????? Element root=doc.createElement("class");
??????? root.setAttribute("name","計算機1班");
??????? doc.appendChild(root);
?????? ?
??????? addElement(doc,root,"黃蓉","30","女");
??????? addElement(doc,root,"郭靖","32","男");
??????? addElement(doc,root,"楊過","8","男");
?????? ?
??????? outputElement(doc,"name");
??????? outputElement(doc,"sex");
?????? ?
??????? writeXml(doc,"mydomxml.xml");
??????? System.out.println("output ok.");
?????????????? ?
??? }
}