java讀取xml文件的四種方法

Xml代碼

<?xml version="1.0" encoding="GB2312"?>
<RESULT>
 <VALUE>　　
  <NO>A1234</NO>　　
  <ADDR>河南省鄭州市</ADDR>
 </VALUE>
 <VALUE>　　
  <NO>B1234</NO> 　
  <ADDR>河南省鄭州市二七區</ADDR>
 </VALUE>
</RESULT>

第一種 DOM 實現方法 

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("VALUE");
   for (int i = 0; i < nl.getLength(); i++) {
    System.out.print("車牌號碼:"+ doc.getElementsByTagName("NO").item(i).getFirstChild().getNodeValue());
    System.out.println("車主地址:"+ doc.getElementsByTagName("ADDR").item(i).getFirstChild().getNodeValue());
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

第二種，DOM4J實現方法： 

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("車牌號碼:" + foo.elementText("NO"));
    System.out.println("車主地址:" + foo.elementText("ADDR"));
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

第三種 JDOM實現方法：

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("車牌號碼:"+ ((Element) allChildren.get(i)).getChild("NO").getText());
    System.out.println("車主地址:"+ ((Element) allChildren.get(i)).getChild("ADDR").getText());
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

第四種SAX實現方法：

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("運行時間：" + (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("車牌號碼：" + 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);   
}   
}