对 Big XML File 的跟进问题:
首先非常感谢您的回答。 之后……我做错了什么? 这是我使用 SAX 的类(class):
public class SAXParserXML extends DefaultHandler {
public static void ParcourXML() {
DefaultHandler handler = new SAXParserXML();
SAXParserFactory factory = SAXParserFactory.newInstance();
try {
String URI = "dblp.xml";
SAXParser saxParser = factory.newSAXParser();
saxParser.parse(URI,handler);
} catch (Throwable t) {
t.printStackTrace ();
}
}
public void startElement (String namespaceURI,String simpleName,String qualifiedName,Attributes attrs) throws SAXException {
}
public void endElement (String namespaceURI,String simpleName,String qualifiedName) throws SAXException {
}
}
你可以看到我没有对我的 XML 文件做任何事情但是它给出了这个错误:
java.lang.OutOfMemoryError: Java heap space
at com.sun.org.apache.xerces.internal.util.XMLStringBuffer.append(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.refresh(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.invokeListeners(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.peekChar(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at SAXParserXML.ParcourXML(SAXParserXML.java:30)
at Main.main(Main.java:28)
我也试过 Stax……同样的错误……我该怎么办? 此外,我将 Java 堆大小增加到 1260M
java -Xmx1260M SAXParserXML
XML 文件具有这种形式:
<dblp>
<incollection>
<author>... </author>
....
<author>... </author>
#other tags-i'm interested only by <author>#
...
</incollection>
<incollection>
# the same thing#
</incollection>
....
</dblp>
您可以找到原始文件:http://dblp.uni-trier.de/xml/
谢谢
最佳答案
有一个 bug对于 Java 1.6,它显示了完全相同的堆栈跟踪,并且到目前为止尚未修复。较新的 Xerces 版本似乎没问题。
对于这么大的文档,其中仍然包含相当多的结构,您可以考虑使用拉式解析,即部分结构的解析,例如 StAX .
关于java - 回复 : Big XML file,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/508878/