java读写XML文件（经测试成功）

      
      
      
      

       
       
       
       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("VALUE");
   for (int i = 0; i < nl.getLength(); i++) {
     System.out.print("车牌号码:"+ doc.getElementsByTagName("NO").item(i).getFirstChild().getNodeValue());
     System.out.println("车主地址:"+ doc.getElementsByTagName("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);
}
}