我正在尝试使用JDOM加载远程HTML文件的源代码（Blogger的配置文件）。我有这段代码：
public Document getDoc(URL url) throws JDOMException, IOException{
SAXBuilder saxBuilder = new SAXBuilder();
saxBuilder.setFeature("http://xml.org/sax/features/validation", false);
saxBuilder.setFeature("http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false);
saxBuilder.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
saxBuilder.setValidation(false);
Document doc = saxBuilder.build(url.openStream());
return doc;
}
当我尝试运行这样的东西时：
public static void main(String[] args) throws BadLocationException, JDOMException, IOException{
linkExtractor(new URL("http://www.blogger.com/profile/07059093309718767384"));
}
我得到了这个例外：
run:
Exception in thread "main" org.jdom.input.JDOMParseException: Error on line 1: The entity name must immediately follow the '&' in the entity reference.
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:468)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:770)
at tc.Crawler.linkExtractor(Crawler.java:60)
at tc.Crawler.main(Crawler.java:44)
Caused by: org.xml.sax.SAXParseException: The entity name must immediately follow the '&' in the entity reference.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:174)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388)
at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1414)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEntityReference(XMLDocumentFragmentScannerImpl.java:1838)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3024)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:453)
... 3 more
Caused by: org.xml.sax.SAXParseException: The entity name must immediately follow the '&' in the entity reference.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:174)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388)
at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1414)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEntityReference(XMLDocumentFragmentScannerImpl.java:1838)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3024)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:453)
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:770)
at tc.Crawler.linkExtractor(Crawler.java:60)
at tc.Crawler.main(Crawler.java:44)
请注意，我必须添加以下行：
saxBuilder.setFeature("http://xml.org/sax/features/validation", false);
saxBuilder.setFeature("http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false);
saxBuilder.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
saxBuilder.setValidation(false);
因为起初我在加载URL: http://www.w3.org/TR/html4/strict.dtd时收到503错误。
感谢。