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
以上就是java使用sax解析xml的代码实例的详细内容。
