java读取XML文件的四种方式及比较的代码实例详细介绍

package com.ibm.xml;

import java.io.*;
import java.util.*;
import org.jdom.*;
import org.jdom.input.*;

public class JDom_xml {
	public static void main(String arge[]) {
		long lasting = System.currentTimeMillis();
		try {
			SAXBuilder builder = new SAXBuilder();
			Document doc = builder.build(new File(
					"src/com/ibm/xml//data_10k.xml"));
			Element foo = doc.getRootElement();
			List allChildren = foo.getChildren();
			for (int i = 0; i < allChildren.size(); i++) {
				System.out.print("车牌号码："
						+ ((Element) allChildren.get(i)).getChild("NO")
								.getText());
				System.out.println("车主地址："
						+ ((Element) allChildren.get(i)).getChild("ADDR")
								.getText());
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

package com.ibm.xml;

import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

public class Dom_xml {
	public static void main(String arge[]) {
		long lasting = System.currentTimeMillis();
		try {
			File f = new File("src/com/ibm/xml//data_10k.xml");
			DocumentBuilderFactory factory = DocumentBuilderFactory
					.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			Document doc = builder.parse(f);
			NodeList nl = doc.getElementsByTagName("VALUE");
			for (int i = 0; i < nl.getLength(); i++) {
				System.out.print("车牌号码："
						+ doc.getElementsByTagName("NO").item(i)
								.getFirstChild().getNodeValue());
				System.out.println("车主地址："
						+ doc.getElementsByTagName("ADDR").item(i)
								.getFirstChild().getNodeValue());
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

package com.ibm.xml;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class SAX_xml extends DefaultHandler {
	java.util.Stack<String> tags = new java.util.Stack<String>();

	public SAX_xml() {
		super();
	}

	public static void main(String args[]) {
		long lasting = System.currentTimeMillis();
		try {
			SAXParserFactory sf = SAXParserFactory.newInstance();
			SAXParser sp = sf.newSAXParser();
			SAX_xml reader = new SAX_xml();
			sp.parse(new InputSource("src/com/ibm/xml//data_10k.xml"), reader);
		} catch (Exception e) {
			e.printStackTrace();
		}
		System.out.println("运行时间：" + (System.currentTimeMillis() - lasting)
				+ "毫秒");
	}

	public void characters(char ch[], int start, int length)
			throws SAXException {
		String tag = tags.peek();
		if (tag.equals("NO")) {
			System.out.print("车牌号码：" + new String(ch, start, length));
		}
		if (tag.equals("ADDR")) {
			System.out.println("地址：" + new String(ch, start, length));
		}
	}

	public void startElement(String uri, String localName, String qName,
			Attributes attrs) {
		tags.push(qName);
	}
}