stax从元素获得属性值
问题描述:
我尝试使用STAX从URI解析XML文件!stax从元素获得属性值
XML看起来像这样:
<Type type_id="4218">
<Title>English Premier League</Title>
<Event start_time="2011-12-18 16:10:00" ev_id="2893772">
<Description>Manchester City v Arsenal</Description>
<Market mkt_typ="Win/Draw/Win">
<Occurrence bet_id="42455761" decimal="1.6666666666667">
<Description>Manchester City</Description>
</Occurrence>
<Occurrence bet_id="42455762" decimal="3.6">
<Description>Draw</Description>
</Occurrence>
<Occurrence bet_id="42455764" decimal="5">
<Description>Arsenal</Description>
</Occurrence>
</Market>
</Event>
</Type>
输出应该是:
id:4218
title:English Premier League
ev_id:2893772
date of match:Sun Dec 18 16:10:00 CET 2011
description:Manchester City v Arsenal
one:1.6666666666667
draw:3.6
two:5
我的代码看起来是这样的:
XMLInputFactory factory = XMLInputFactory.newInstance();
try {
XMLStreamReader streamReader = factory.createXMLStreamReader(new URL("http://cubs.bluesq.com/cubs/cubs.php?action=getpage&thepage=385.xml").openStream());
while (streamReader.hasNext()) {
int event = streamReader.next();
if(event == XMLStreamConstants.START_ELEMENT){
if(streamReader.getLocalName().equals("Type")){
long id = Integer.parseInt(streamReader.getAttributeValue(null, "type_id"));
if(id == 4218){
System.out.println("id:"+id);
streamReader.nextTag();
System.out.println("title:"+streamReader.getElementText());
streamReader.nextTag();
int ev_id = Integer.parseInt(streamReader.getAttributeValue(null, "ev_id"));
System.out.println("ev_id:"+ev_id);
DateFormat formater = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
formater.setTimeZone(TimeZone.getTimeZone("CET"));
String tempDatum = streamReader.getAttributeValue(null,"start_time");
Date dateOfMatch = formater.parse(tempDatum);
System.out.println("date of match:"+dateOfMatch);
streamReader.nextTag();
String description = streamReader.getElementText();
System.out.println("description:"+ description);
streamReader.nextTag();
String market = streamReader.getAttributeValue(null, "mkt_typ");
if(market.equals("Win/Draw/Win")){
streamReader.nextTag();
double one = Double.parseDouble(streamReader.getAttributeValue(null, "decimal"));
System.out.println("one:"+ one);
double draw = Double.parseDouble(streamReader.getAttributeValue(null, "decimal"));
System.out.println("draw:"+draw);
double two = Double.parseDouble(streamReader.getAttributeValue(null, "decimal"));
System.out.println("two:"+two);
}
}
}
}
}
此代码产生输出:
id:4218
title:English Premier League
ev_id:2893772
date of match:Sun Dec 18 16:10:00 CET 2011
description:Manchester City v Arsenal
one:1.6666666666667
draw:1.6666666666667
two:1.6666666666667
如何从元素“Occurrence”中的属性“decimal”中获取其他值?
答
if(market.equals("Win/Draw/Win")){ streamReader.nextTag();
我只用了一个快速的样子,但我要说你可能是住在第一次出现因素,因为你打电话streamReader.nextTag()只有一次,但streamReader.getAttributeValue三次。
答
private String xmlFile =“file location”; private String desiredAttribute; 。
...
类加载器的类加载器= this.getClass()getClassLoader();
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
InputStream inputStream = classLoader.getResourceAsStream(xmlFile);
XMLEventReader xmlEventReader = inputFactory.createXMLEventReader(inputStream);
尝试{
while (xmlEventReader.hasNext()) {
XMLEvent event = xmlEventReader.nextEvent();
if (event.isStartElement()) {
StartElement startElement = event.asStartElement();
QName qname = startElement.getName();
String elementName = qname.toString();
if (elementName.equals("My Element")) {
Iterator attributes = startElement.getAttributes();
while (attributes.hasNext()) {
Attribute attribute = (javax.xml.stream.events.Attribute) (attributes.next());
String attribute= attribute.getValue();
desiredAttribute = attribute;
}
...
您还可以检查属性的名称,而迭代
这看起来像XSLT和/或XPath工作......我确定你有使用这个库的理由,但我不知道它是否有用,但我确实知道XPath和XSLT非常棒,它们(特别是XPath)可以很容易地输出结果(恕我直言) – 2011-12-14 18:55:25