怎么解析XML？

js中解析
<html>
<head>
<script type="text/javascript"
for="window" event="onload">
var xmlDoc=new ActiveXObject("Microsoft.XMLDOM")
xmlDoc.async="false"
xmlDoc.load("xml_note.xml")
nodes=xmlDoc.documentElement.childNodes
to.innerText=    nodes.item(0).text
from.innerText=  nodes.item(1).text
header.innerText=nodes.item(2).text
body.innerText=  nodes.item(3).text
</script>
<title>HTML using XML data</title>
</head>
<body bgcolor="yellow">
<h1>W3Schools.com Internal Note</h1>
<b>To: </b>
<span id="to"> </span>
<br />
<b>From: </b>
<span id="from"></span>
<hr>
<b><span id="header"></span></b>
<hr>
<span id="body"></span>
</body>
</html>
java中解析


import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
//下面主要是org.xml.sax包的类
import org.w3c.dom.*;
import org.xml.sax.SAXException;

public class DOMPrinter{
    //打印指定节点(节点名:节点值)
    public static void printNodeInfo(Node node){
        System.out.println(node.getNodeName()+" : "+node.getNodeValue());
    }
    //递归打印全部节点
    public static void printNode(Node node){
        short nodeType=node.getNodeType();
        //判断节点类型
        switch(nodeType){
            //前缀节点
            case Node.PROCESSING_INSTRUCTION_NODE:
                System.out.println("-----------PI start-----------");
                printNodeInfo(node);
                System.out.println("-----------PI end-----------");
                break;
            //元素节点
            case Node.ELEMENT_NODE:
                System.out.println("-----------Element start-----------");
                printNodeInfo(node);
                System.out.println("-----------Element end-----------");
                //打印节点属性值
                NamedNodeMap attrs=node.getAttributes();
                int attrNum=attrs.getLength();
                for(int i=0;i<attrNum;i++){
                    Node attr=attrs.item(i);
                    System.out.println("-----------Attribute start-----------");
                    printNodeInfo(attr);
                    System.out.println("-----------Attribute end-----------");
                }
                break;
            //文本节点
            case Node.TEXT_NODE:
                System.out.println("-----------Text start-----------");
                printNodeInfo(node);
                System.out.println("-----------Text end-----------");
                break;
            default:
                break;
        }
        //递归打印节点信息
        Node child=node.getFirstChild();
        while(child!=null){
            printNode(child);
            child=child.getNextSibling();
        }
    }

    public static void main(String[] args){
        //DOM解析器的工厂实例
        DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
        try{
            //从DOM工厂获得DOM解析器
            DocumentBuilder db=dbf.newDocumentBuilder();
            //解析XML文档的输入流，得到一个Document
            Document doc=db.parse(new File("students.xml"));
            //打印节点
            printNode(doc);
        }
        catch (ParserConfigurationException e){
            e.printStackTrace();
        }
        catch (SAXException e){
            e.printStackTrace();
        }
        catch (IOException e){
            e.printStackTrace();
        }
    }
}

调试易

怎么解析XML？

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