DomReader.java
/*
* Copyright@ 2011 www.egtry.com
*/
package egtry.xml;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class DomReader {
public static void main(String[] args) throws Exception {
//step 1. create DocumentBuilder
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
DocumentBuilder domBuilder=factory.newDocumentBuilder();
//step 2. build up xml document from InputStream
String xml="<root><a n=\"1\"></a></root>";
InputStream in=new ByteArrayInputStream(xml.getBytes());
Document doc=domBuilder.parse(in);
Node docNode=(Node)doc;
printNode(docNode);
}
public static void printNode(Node node) {
//node and its attributes
String name=node.getNodeName();
System.out.print("<"+name);
if (node.hasAttributes()) {
NamedNodeMap attributes=node.getAttributes();
for(int i=0; i<attributes.getLength(); i++) {
Node attribute=attributes.item(i);
System.out.print(" "+attribute.getNodeName()+"=\""+attribute.getNodeValue()+"\"");
}
}
System.out.println(">");
//get child nodes
NodeList childList=node.getChildNodes();
for(int i=0; i<childList.getLength(); i++ ) {
Node child=childList.item(i);
printNode(child);
}
System.out.println("</"+name+">");
}
}