我有这个EventFilter实现,它应该过滤<InterestingElement>
启动元素事件:
class InterestingElementFilter implements EventFilter {
@Override
public boolean accept(XMLEvent event)
{
if (event.isStartElement()) {
StartElement startElement = event.asStartElement();
String name = startElement.getName().getLocalPart();
if (name.equals("InterestingElement")) {
return true;
}
}
return false;
}
}
然后我创建一个过滤的阅读器:
XMLEventReader interestingElementReader = xmlInputFactory.createFilteredReader(xmlEventReader, new InterestingElementFilter());
致电
startElementReader.peek();
我明白了:
java.lang.StackOverflowError
at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.skipSpaces(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.seekCloseOfStartTag(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(Unknown Source)
at com.sun.xml.internal.stream.XMLEventReaderImpl.peek(Unknown Source)
at javax.xml.stream.util.EventReaderDelegate.peek(Unknown Source)
at com.sun.xml.internal.stream.EventFilterSupport.peek(Unknown Source)
at com.sun.xml.internal.stream.EventFilterSupport.peek(Unknown Source)
at com.sun.xml.internal.stream.EventFilterSupport.peek(Unknown Source)
at com.sun.xml.internal.stream.EventFilterSupport.peek(Unknown Source)
如果有人知道问题是什么,我将不胜感激。
答案 0 :(得分:2)
我无法重现您的问题,以下根据您的说明适合我。我错过了你的问题吗?:
<强> InterestingElementFilter 强>
import javax.xml.stream.EventFilter;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
class InterestingElementFilter implements EventFilter {
public boolean accept(XMLEvent event)
{
if (event.isStartElement()) {
StartElement startElement = event.asStartElement();
String name = startElement.getName().getLocalPart();
if (name.equals("InterestingElement")) {
return true;
}
}
return false;
}
}
<强>演示强>
import java.io.FileInputStream;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.events.XMLEvent;
public class Demo {
public static void main(String[] args) throws Exception {
XMLInputFactory xmlInputFactory = XMLInputFactory.newFactory();
XMLEventReader xmlEventReader = xmlInputFactory.createXMLEventReader(new FileInputStream("input.xml"));
InterestingElementFilter filter = new InterestingElementFilter();
XMLEventReader interestingElementReader = xmlInputFactory.createFilteredReader(xmlEventReader, filter);
while(interestingElementReader.hasNext()) {
XMLEvent xmlEvent = interestingElementReader.peek();
if(xmlEvent.isStartElement()) {
System.out.println(xmlEvent.asStartElement().getName());
}
interestingElementReader.next();
}
}
}
<强> input.xml中强>
<?xml version="1.0" encoding="UTF-8"?>
<root>
<InterestingElement>
<child>Hello World</child>
</InterestingElement>
</root>