<?xml version="1.0" encoding="UTF-8"?>
<users><user id="0"><name>Alexia</name><age>23</age><sex>Female</sex></user><user id="1"><name>Edward</name><age>24</age><sex>Male</sex></user><user id="2"><name>wjm</name><age>23</age><sex>Female</sex></user><user id="3"><name>wh</name><age>24</age><sex>Male</sex></user>
</users>

 1 /**2  * @author Alexia3  *4  * 定义XML文档解析的接口5  */6 public interface XmlDocument {7     8     /**9      * 解析XML文档
10      *
11      * @param fileName
12      *            文件全路径名称
13      */
14     public void parserXml(String fileName);
15 }

package com.xml;import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;/*** @author Alexia* * DOM 解析XML文档*/
public class DomDemo implements XmlDocument {private Document document;public void parserXml(String fileName) {try {DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();DocumentBuilder db = dbf.newDocumentBuilder();Document document = db.parse(fileName);NodeList users = document.getChildNodes();for (int i = 0; i < users.getLength(); i++) {Node user = users.item(i);NodeList userInfo = user.getChildNodes();for (int j = 0; j < userInfo.getLength(); j++) {Node node = userInfo.item(j);NodeList userMeta = node.getChildNodes();for (int k = 0; k < userMeta.getLength(); k++) {if(userMeta.item(k).getNodeName() != "#text")System.out.println(userMeta.item(k).getNodeName()+ ":" + userMeta.item(k).getTextContent());}System.out.println();}}} catch (FileNotFoundException e) {e.printStackTrace();} catch (ParserConfigurationException e) {e.printStackTrace();} catch (SAXException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}
}

package com.xml;import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.StringWriter;import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.stream.StreamResult;import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
import org.xml.sax.helpers.DefaultHandler;/*** @author Alexia* * SAX 解析XML文档*/
public class SaxDemo implements XmlDocument {public void parserXml(String fileName) {SAXParserFactory saxfac = SAXParserFactory.newInstance();try {SAXParser saxparser = saxfac.newSAXParser();InputStream is = new FileInputStream(fileName);saxparser.parse(is, new MySAXHandler());} catch (ParserConfigurationException e) {e.printStackTrace();} catch (SAXException e) {e.printStackTrace();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}
}class MySAXHandler extends DefaultHandler {boolean hasAttribute = false;Attributes attributes = null;public void startDocument() throws SAXException {// System.out.println("文档开始打印了");}public void endDocument() throws SAXException {// System.out.println("文档打印结束了");}public void startElement(String uri, String localName, String qName,Attributes attributes) throws SAXException {if (qName.equals("users")) {return;}if (qName.equals("user")) {return;}if (attributes.getLength() > 0) {this.attributes = attributes;this.hasAttribute = true;}}public void endElement(String uri, String localName, String qName)throws SAXException {if (hasAttribute && (attributes != null)) {for (int i = 0; i < attributes.getLength(); i++) {System.out.print(attributes.getQName(0) + ":"+ attributes.getValue(0));}}}public void characters(char[] ch, int start, int length)throws SAXException {System.out.print(new String(ch, start, length));}
}

package com.xml;import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import org.jdom2.output.XMLOutputter;/*** @author Alexia* * JDOM 解析XML文档* */
public class JDomDemo implements XmlDocument {public void parserXml(String fileName) {SAXBuilder builder = new SAXBuilder();try {Document document = builder.build(fileName);Element users = document.getRootElement();List userList = users.getChildren("user");for (int i = 0; i < userList.size(); i++) {Element user = (Element) userList.get(i);List userInfo = user.getChildren();for (int j = 0; j < userInfo.size(); j++) {System.out.println(((Element) userInfo.get(j)).getName()+ ":" + ((Element) userInfo.get(j)).getValue());}System.out.println();}} catch (JDOMException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}
}

package com.xml;import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.util.Iterator;import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;/*** @author Alexia* * Dom4j 解析XML文档*/
public class Dom4jDemo implements XmlDocument {public void parserXml(String fileName) {File inputXml = new File(fileName);SAXReader saxReader = new SAXReader();try {Document document = saxReader.read(inputXml);Element users = document.getRootElement();for (Iterator i = users.elementIterator(); i.hasNext();) {Element user = (Element) i.next();for (Iterator j = user.elementIterator(); j.hasNext();) {Element node = (Element) j.next();System.out.println(node.getName() + ":" + node.getText());}System.out.println();}} catch (DocumentException e) {System.out.println(e.getMessage());}}}