使用递归解析给定的任意一个xml文档并且将其内容输出到命令行上

import java.io.File;

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;

/**

* 使用递归解析给定的任意一个xml文档并且将其内容输出到命令行上

*/

public class testDOMXML{

public static void main(String[] args) throws Exception

{

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

DocumentBuilder db = dbf.newDocumentBuilder();

Document doc = db.parse(new File("C://Users//Administrator//Desktop//test.xml"));

//获得根元素结点

Element root = doc.getDocumentElement();

parseElement(root);

}

private static void parseElement(Element element)

{

String tagName = element.getNodeName();

NodeList children = element.getChildNodes();

System.out.print("<" + tagName);

//element元素的所有属性所构成的NamedNodeMap对象，需要对其进行判断

NamedNodeMap map = element.getAttributes();

//如果该元素存在属性

if(null != map){

for(int i = 0; i < map.getLength(); i++){

//获得该元素的每一个属性

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 < children.getLength(); i++){

Node node = children.item(i);

//获得结点的类型

short nodeType = node.getNodeType();

if(nodeType == Node.ELEMENT_NODE){

//是元素，继续递归

parseElement((Element)node);

}

else if(nodeType == Node.TEXT_NODE){

//递归出口

System.out.print(node.getNodeValue());

}

else if(nodeType == Node.COMMENT_NODE){

System.out.print("<!--");

Comment comment = (Comment)node;

//注释内容

String data = comment.getData();

System.out.print(data);

System.out.print("-->");

}

}

System.out.print("</" + tagName + ">");

}

}