DOM解析XML文件实例(一)

package u;
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.Node;
import org.xml.sax.SAXException;

public class y {

private static DocumentBuilderFactory dbf;
private static DocumentBuilder db;
private static Document d;
private static File f;

public static Document  parseXmlFile()
{
Element dd;
dbf=DocumentBuilderFactory.newInstance();

try
{
db=dbf.newDocumentBuilder();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

f=new File("f:/t.xml");/////////////打开一个写xml文件

try
{
d=db.parse(f);//////将xml文件转换成Document
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

dd= d.getDocumentElement();//获得xml的根节点
Element ee=d.createElement("fff");///创建一个元素

dd.appendChild(ee);////给根节点添加孩子节点

return d;
}

public static void WritePath(Node d,String path)
{
//////保存生成的xml文件

TransformerFactory tff=TransformerFactory.newInstance();
Transformer tf;
DOMSource ds=new DOMSource(d);
StreamResult sr=new StreamResult(new File(path));

try
{
tf=tff.newTransformer();
tf.transform(ds, sr);
} catch (TransformerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

public static void main(String[] args)
{
// TODO Auto-generated method stub
Document sd=parseXmlFile();
WritePath(sd,"f:/t.xml");

}

}