XML 文件的操作(二)

xml

<?xml version="1.0" encoding="gb2312"?>

<?xml-stylesheet type="text/xsl" href="students.xsl"?>

<students>
	<student sn="01">
		<name>张三</name>
		<age>18</age>
	</student>
	
	<student sn="02">
		<name>李四</name>
		<age>20</age>
	</student>
</students>

DOM循环遍历获取所有节点

package com.ibm.xml;

import java.io.File;
import java.io.IOException;

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

import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;

/**
 * 循环遍历获取所有节点
 * @author Administrator
 *
 */
public class DOMPrinter {

	/**
	 * 打印节点名称
	 * @param node
	 */
	public static void printNodeInfo(Node node)
	{
		System.out.println(node.getNodeName()+" : "+node.getNodeValue());
	}
	
	/**
	 * 通过节点判断
	 * @param node
	 */
	public static void printNode(Node node)
	{
		short nodeType=node.getNodeType();
		switch(nodeType)
		{
		//指令节点
		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-----------");
			
			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;
		case Node.TEXT_NODE:
			System.out.println("-----------Text start-----------");
			printNodeInfo(node);
			System.out.println("-----------Text end-----------");
			break;
		default:
			break;
		}
		
		Node child=node.getFirstChild();
		while(child!=null)
		{
			printNode(child);
			child=child.getNextSibling();
		}
	}
	
	public static void main(String arge[]){
		DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
		
		try
		{
			DocumentBuilder db=dbf.newDocumentBuilder();
			Document doc=db.parse(new File("students.xml"));
			DOMPrinter.printNode(doc);
			printNode(doc);
		}
		catch (ParserConfigurationException e)
		{
			// TODO 自动生成 catch 块
			e.printStackTrace();
		}
		catch (SAXException e)
		{
			// TODO 自动生成 catch 块
			e.printStackTrace();
		}
		catch (IOException e)
		{
			// TODO 自动生成 catch 块
			e.printStackTrace();
		}
	}
}