java使用SAXxml的代码
import java.io.File;
import java.util.LinkedList;
import java.util.List;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class ParseXMLFileWithSAX extends DefaultHandler {
private StringBuffer buffer = new StringBuffer();
private static String responseCode;
private static String date;
private static String title;
private static Currency currency;
private static Rates rates;
public static void main(String[] args) throws Exception {
DefaultHandler handler = new ParseXMLFileWithSAX();
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating(false);
SAXParser parser = factory.newSAXParser();
parser.parse(new File("in.xml"), handler);
System.out.println("Response Code:" responseCode);
System.out.println("Date:" date);
System.out.println("Title:" title);
System.out.println("Rates:");
for (Currency curr : rates.currencies) {
System.out.println("\tCode:" curr.code " - Rate:" curr.rate);
}
}
private static class Currency {
public String code;
public String rate;
}
private static class Rates {
public List<Currency> currencies = new LinkedList<Currency>();
}
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
buffer.setLength(0);
if (qName.equals("response")) {
responseCode = attributes.getValue("code");
}
else if (qName.equals("date")) {
date = "";
}
else if (qName.equals("title")) {
title = "";
}
else if (qName.equals("rates")) {
rates = new Rates();
}
else if (qName.equals("currency")) {
currency = new Currency();
}
}
@Override
public void endElement(String uri, String localName, String qName)throws SAXException {
if (qName.equals("date")) {
date = buffer.toString();
}
else if (qName.equals("title")) {
title = buffer.toString();
}
else if (qName.equals("currency")) {
rates.currencies.add(currency);
}
else if (qName.equals("code")) {
currency.code = buffer.toString();
}
else if (qName.equals("rate")) {
currency.rate = buffer.toString();
}
}
public void characters(char[] ch, int start, int length) {
buffer.append(ch, start, length);
}
}
输入xml文件:
<?xml version="1.0" encoding="UTF-8" ?>
<response code="200">
<date>2008-11-07</date>
<title>Exchange rates for 2008-11-07</title>
<rates>
<currency>
<code>EUR</code>
<rate>1.220</rate>
</currency>
<currency>
<code>USD</code>
<rate>1.275</rate>
</currency>
</rates>
</response>
输出:
Response Code:200
Date:2008-11-07
Title:Exchange rates for 2008-11-07
Rates:
Code:EUR - Rate:1.0
Code:USD - Rate:1.275600
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