JAVA進行XML解析

XML文字的內容

<?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>

下面是XML的四種解析方式。

package learningxml;

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 ReadXML {
    public static void main(String[] args) {
        long lasting = System.currentTimeMillis();

        try {
            File f = new File("d:\\xuexi\\learningxml.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();
        }
    }
}

第二種方法

package learningxml;

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("d:\\xuexi\\learningxml.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();
        }
    }
}

第三種方法

package learningxml;

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("d:\\xuexi\\learningxml.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();   
   }   
}   
}

第四種方法：

package learningxml;

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("d:\\xuexi\\learningxml.xml"), reader);   
   } catch (Exception e) {   
    e.printStackTrace();   
   }   

   System.out.println("執行時間：" + (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);   
}   
}