java讀取xml文件的四種方法

女巫城堡 2012-07-24

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java讀取xml文件的四種方法

2009-08-25 10:42

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(qū)</ADDR>
</VALUE>
</RESULT>

第一種 DOM 實(shí)現(xiàn)方法：

Java代碼

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(hào)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(shí)現(xiàn)方法：

Java代碼

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

第三種 JDOM實(shí)現(xiàn)方法：

Java代碼

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(hào)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(shí)現(xiàn)方法：

Java代碼

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(yùn)行時(shí)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(hào)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);
}
}

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