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Java解析XML文件的四种方法
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();
}
)
!
Java解析XML文件的四种方法