纯java解析xml文档

package com.huawei3;

import java.io.File;
import java.lang.annotation.ElementType;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Attr;
import org.w3c.dom.Comment;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Demo1 {

	/**
	 * @param args
	 * @throws Exception 
	 */
	public static void main(String[] args) throws Exception {
		// TODO Auto-generated method stub
		test1();
	}
	public static void test1 ()throws Exception
	{
		DocumentBuilderFactory documentBuilderFactory=DocumentBuilderFactory.newInstance();
		DocumentBuilder documentBuilder=documentBuilderFactory.newDocumentBuilder();
		Document document=documentBuilder.parse(new File("candidate.xml"));
		Element root=document.getDocumentElement();
		pareElement(root);
	}
	public static void pareElement(Element element){
		String tag=element.getTagName();
		NodeList child=element.getChildNodes();
		System.out.print("<"+tag);
		NamedNodeMap map=element.getAttributes();
		if(map!=null){
			//有属性值
			for(int i=0;i<map.getLength();i++){
				Attr attr=(Attr)map.item(i);
				String attrName=attr.getName();
				String attrValue=attr.getValue();
				System.out.print(" "+attrName+"=\""+attrValue+"\"");
			}
		}
		System.out.print(">");
		for(int i=0;i<child.getLength();i++){
			Node node=child.item(i);
			short nodeType=node.getNodeType();
			if(nodeType==Node.ELEMENT_NODE){
				pareElement((Element)node);
			}
			if(nodeType==Node.TEXT_NODE){
				System.out.print(node.getNodeValue());
			}
			if(nodeType==Node.COMMENT_NODE){
				System.out.print("<!--");
				Comment comment=(Comment)node;
				String date=comment.getData();
				System.out.print(date);
				System.out.print("-->");
			}
			
		}
		System.out.println("</"+tag+">");
		
	}

}