XML四大解析方式

myusers.xml   mick   123   jack   123456 第一种：DOM解析方式 package com.softeem.xml.demo; 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.Element; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; public class TestDOM { public static void main(String[] args) {   DocumentBuilderFactory factory =    DocumentBuilderFactory.newInstance();   try {    DocumentBuilder builder =     factory.newDocumentBuilder();    Document doc =  builder.parse(new File    ("src/com/softeem/xml/demo/myusers.xml"));    NodeList nodeList = doc.getElementsByTagName("user");    for (int i = 0; i < nodeList.getLength(); i++) {     Element user  = (Element)nodeList.item(i);     System.out.println("id:"+user.getAttribute("id"));     String name = user.getElementsByTagName("name").item(i)     .getFirstChild().getNodeValue();        System.out.println("name:"+name);     String pass = user.getElementsByTagName("pass").item(i)     .getFirstChild().getNodeValue();     System.out.println("pass:"+pass);    }   } 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();   } } } 第二种：SAX解析方式 package com.softeem.xml.demo; import java.io.File; import java.io.IOException; import java.util.Stack; import javax.xml.parsers.ParserConfigurationException; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class TestSAX extends DefaultHandler{ //定义一个栈   先进后出 Stack stack =  new Stack(); public static void main(String[] args) {   SAXParserFactory factory =    SAXParserFactory.newInstance();   try {    SAXParser parser = factory.newSAXParser();    parser.parse(new File("src/com/softeem" +   "/xml/demo/myusers.xml"), new TestSAX());   } 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();   } } public void startDocument(){   System.out.println("start......"); } //接受文档元素开始的通知 //uri名称空间的URI //localName 本地名称 //name 限定名称节点的值 //attributes 附加到元素的属性 public void startElement(String uri,String localName,    String name,Attributes attributes){   //把项压入栈的顶部   stack.push(name);   String id  = attributes.getValue("id");   if(id != null){    System.out.println("id:"+id);   } } //接受元素字符数据的通知 //ch 整个文档的字符 //start 字符数据中的开始位置 //length 从字符数据中使用的字符长度 public void characters(char[] ch,int start,int length){   String value = new String(ch,start,length);   //查看栈顶   String name = (String)stack.peek();   if(name.equals("name")){    System.out.println("name:"+value);   }else if(name.equals("pass")){    System.out.println("pass:"+value);   } } //接受元素结束的通知 public void endElement(String uri,String localName    ,String name){   //移除栈顶的对象   stack.pop(); } //接受文档结束的通知 public void endDocument(){   try {    super.endDocument();   } catch (SAXException e) {    // TODO Auto-generated catch block    e.printStackTrace();   } } } 第三种：JDOM解析方式 package com.softeem.xml.demo; import java.io.File; import java.io.IOException; import java.util.List; import org.jdom.Document; import org.jdom.Element; import org.jdom.JDOMException; import org.jdom.Namespace; import org.jdom.input.SAXBuilder; public class TestJDOM { public static void main(String[] args) {   SAXBuilder builder = new SAXBuilder();   try {    Document doc = builder.    build(new File("src/com/softeem/xml/demo/myusers.xml"));    Element root = doc.getRootElement();    Namespace ns = root.getNamespace();    System.out.println("ns:"+ns);    List list = root.getChildren();    for (int i = 0; i < list.size(); i++) {     Element user = (Element)list.get(i);     String id = user.getAttributeValue("id");        System.out.println("id:"+id);     String name =  user.getChild("name",ns).getText();     System.out.println("name:"+name);     String pass = user.getChild("pass",ns).getText();     System.out.println("pass:"+pass);    }     } catch (JDOMException e) {    // TODO Auto-generated catch block    e.printStackTrace();   } catch (IOException e) {    // TODO Auto-generated catch block    e.printStackTrace();   } } } 第四种：DOM4J解析方式 package com.softeem.xml.demo; import java.io.File; import java.util.Iterator; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Element; import org.dom4j.io.SAXReader; public class TestDOM4J { public static void main(String[] args) {   SAXReader reader = new SAXReader();   try {    Document doc = reader.read(   new File("src/com/softeem/xml/demo/myusers.xml"));    Element root = doc.getRootElement();    Iterator it = root.elementIterator();    while(it.hasNext()){     Element user = (Element)it.next();     String id = user.attributeValue("id");     System.out.println("id:"+id);     String name = user.elementText("name");     System.out.println("name:"+name);     String pass = user.elementText("pass");     System.out.println("pass:"+pass);    }      } catch (DocumentException e) {    // TODO Auto-generated catch block    e.printStackTrace();   } } }