四种方法教你如何用Java读取xml文件-技术开发专区

四种方法教你如何用Java读取xml文件

作者：永辉编辑：董建伟 2011-01-21 00:00 来源：中国I

　　第三种 JDOM实现方法：

　　Java代码

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());
}
System.out.println("运行时间：" + (System.currentTimeMillis() - lasting)
+ "毫秒");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

　　第四种SAX实现方法：

　　Java代码

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);
}
}

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