Java中四种操作XML方式的比较(2)

2007-04-05 12:00 佚名中国IT实验室我要评论(0) 字号：T | T

本文给出了Java中四种操作XML方式的简介、比较和基本使用方法，附有源代码。

AD：

3.四种XML操作方式的基本使用方法

xml文件：

＜?xml version="1.0" encoding="GB2312"?＞
＜RESULT＞
＜VALUE＞
＜NO＞A1234＜/NO＞
＜ADDR＞四川省XX县XX镇XX路X段XX号＜/ADDR＞
＜/VALUE＞
＜VALUE＞
＜NO＞B1234＜/NO＞
　　＜ADDR＞四川省XX市XX乡XX村XX组＜/ADDR＞
＜/VALUE＞
＜/RESULT＞

1）DOM

import java.io.*; 
import java.util.*; 
import org.w3c.dom.*; 
import javax.xml.parsers.*; 
public class MyXMLReader{ 
　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(); 
}

2）SAX

import org.xml.sax.*; 
import org.xml.sax.helpers.*; 
import javax.xml.parsers.*; 
public class MyXMLReader extends DefaultHandler { 
　java.util.Stack tags = new java.util.Stack(); 
　public MyXMLReader() { 
super(); 
} 
　public static void main(String args[]) { 
long lasting = System.currentTimeMillis(); 
try { 
　SAXParserFactory sf = SAXParserFactory.newInstance(); 
　SAXParser sp = sf.newSAXParser(); 
　MyXMLReader reader = new MyXMLReader(); 
　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);} 
}

3）JDOM

import java.io.*; 
import java.util.*; 
import org.jdom.*; 
import org.jdom.input.*; 
public class MyXMLReader { 
　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(); 
} 
}

4）DOM4J

import java.io.*; 
import java.util.*; 
import org.dom4j.*; 
import org.dom4j.io.*; 
public class MyXMLReader { 
　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(); 
} 
)