java读取xml文件的四种方法

Xml代码

 <?xml version="1.0" encoding="GB2312"?>
 <RESULT>
 <VALUE>　　
   <NO>A1234</NO>　　
   <ADDR>河南省郑州市</ADDR>
 </VALUE>
 <VALUE>　　
   <NO>B1234</NO> 　
   <ADDR>河南省郑州市二七区</ADDR>
 </VALUE>
 </RESULT>

第一种 DOM 实现方法：

 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 MyXMLReader2DOM {
 public static void main(String arge[]) {   

   long lasting = System.currentTimeMillis();   

   try {
     File f = new File("data_10k.xml");
     DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
     DocumentBuilder builder = factory.newDocumentBuilder();
     Document doc = builder.parse(f);
     NodeList nl = doc.getElementsByTagName_r("VALUE");
    for (int i = 0; i < nl.getLength(); i++) {
      System.out.print("车牌号码:"+ doc.getElementsByTagName_r("NO").item(i).getFirstChild().getNodeValue());
      System.out.println("车主地址:"+ doc.getElementsByTagName_r("ADDR").item(i).getFirstChild().getNodeValue());
     }
    } catch (Exception e) {
     e.printStackTrace();
    }
 }
 }  

第二种，DOM4J实现方法

 import java.io.*;
 import java.util.*;
 import org.dom4j.*;
 import org.dom4j.io.*;   

 public class MyXMLReader2DOM4J {
 public static void main(String arge[]) {
   long lasting = System.currentTimeMillis();
   try {
     File f = new File("data_10k.xml");
     SAXReader reader = new SAXReader();
     Document doc = reader.read(f);
     Element root = doc.getRootElement();
     Element foo;
    for (Iterator i = root.elementIterator("VALUE"); i.hasNext();) {
      foo = (Element) i.next();
      System.out.print("车牌号码:" + foo.elementText("NO"));
      System.out.println("车主地址:" + foo.elementText("ADDR"));
     }
    } catch (Exception e) {
     e.printStackTrace();
    }
 }
 }  

第三种 JDOM实现方法：

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

 public class MyXMLReader2JDOM {
 public static void main(String arge[]) {
   long lasting = System.currentTimeMillis();
   try {
     SAXBuilder builder = new SAXBuilder();
     Document doc = builder.build(new File("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();
    }
 }
 }

第四种SAX实现方法：

 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 MyXMLReader2SAX extends DefaultHandler {   

 java.util.Stack tags = new java.util.Stack();   

 public MyXMLReader2SAX() {
   super();
 }   

 public static void main(String args[]) {
   long lasting = System.currentTimeMillis();
   try {
     SAXParserFactory sf = SAXParserFactory.newInstance();
     SAXParser sp = sf.newSAXParser();
     MyXMLReader2SAX reader = new MyXMLReader2SAX();
     sp.parse(new InputSource("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 = (String) 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);
 }
 }