XMLParse 读取XML字段 -- JDOM & DOM4J

package com.study;

import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Stack;

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

import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class XMLParse extends DefaultHandler {

	/**
	 * @param args
	 */
	Stack<String> tags = new Stack<String>();

	public XMLParse() {
		super();
	}

	public static void main(String[] args) throws Exception {
		// TODO Auto-generated method stub
		XMLParse myXML = new XMLParse();
		//System.out.println("=====================DOM=========================");
		//myXML.DOM();
		//System.out.println("=====================SAX=========================");
		//myXML.SAX();
		//System.out.println("=====================JDOM========================");
		//myXML.JDOM();
		//System.out.println("=====================DOM4J=======================");
		myXML.DOM4J();
		//System.out.println("=================================================");
	}
	
	File f = new File("D://test.xml");

/*	public void DOM() {

		long start = System.currentTimeMillis();
		try {
			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			Document doc = builder.parse(f);
			NodeList nl = doc.getElementsByTagName("data");
			for (int i = 0; i < nl.getLength(); i++) {
				System.out.println("Name|"
						+ doc.getElementsByTagName("name").item(i)
								.getFirstChild().getNodeValue());
				System.out.println("Mail|"
						+ doc.getElementsByTagName("mail").item(i)
								.getFirstChild().getNodeValue());
			}
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SAXException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		long end = System.currentTimeMillis();
		System.out.println("dom runtime" + (end - start) + "MS");
	}	

	public void SAX() {

		long start = System.currentTimeMillis();
		try {
			SAXParserFactory sf = SAXParserFactory.newInstance();
			SAXParser sp = sf.newSAXParser();
			XMLParse reader = new XMLParse();
			sp.parse(f,reader);
		} catch (Exception e) {
			e.printStackTrace();
		}
		System.out.println("sax runtime"
				+ (System.currentTimeMillis() - start) + " MS");
	}

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

	public void characters(char ch[],int start,int length)
			throws SAXException {
		String tag = (String) tags.peek();
		if (tag.equals("name")) {
			System.out.println("Name|" + new String(ch,start,length));
		}
		else if (tag.equals("mail")) {
			System.out.println("Space|" + new String(ch,length));
		}
	}*/
	
	public void JDOM() {
		long start = System.currentTimeMillis();
		try {
			SAXBuilder builder = new SAXBuilder();
			org.jdom2.Document doc = builder.build(f);
			Element foo = doc.getRootElement();
			
			List<?> allChildren = foo.getChildren("datas");
			//Element ele=foo.getChild("datas");  //获取datas元素，如果有多个获取List个数循环查询
			for (int i = 0; i < allChildren.size(); i++) {	
				Element ele = (Element) allChildren.get(i);
				List<?> elechilds = ele.getChildren("data");
				for (int j = 0; j < elechilds.size(); j++) {
					System.out.println("Name | "+((Element) elechilds.get(j)).getChildText("name"));
					System.out.println("Mail | "+((Element) elechilds.get(j)).getChildText("mail"));
					System.out.println("QQ   | "+((Element) elechilds.get(j)).getChildText("qq"));
					System.out.println("-----------------");
				}
			}
			
		} catch (JDOMException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		long end = System.currentTimeMillis();
		System.out.println("jdom runtime" + (end - start) + "MS");
	}  

	public void DOM4J() {
		long start = System.currentTimeMillis();
		try {
			SAXReader reader = new SAXReader();
			org.dom4j.Document doc = reader.read(f);
			org.dom4j.Element root = doc.getRootElement();
			
			for (@SuppressWarnings("rawtypes") java.util.Iterator i = root.elementIterator("datas"); i.hasNext();) {
				org.dom4j.Element foo = (org.dom4j.Element) i.next();
				for (@SuppressWarnings("rawtypes") java.util.Iterator j = foo.elementIterator("data"); j.hasNext();) {
					org.dom4j.Element ele = (org.dom4j.Element) j.next();
					System.out.println("Name|" + ((org.dom4j.Element) ele).elementText("name"));
					
				}
				System.out.println("------------------");
			}
		} catch (DocumentException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		long end = System.currentTimeMillis();
		System.out.println("dom4j runtime" + (end - start) + "MS");
	}
	
}

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!