JTidy升级中断文档xpath

Question

我刚刚更新到10月份发布的最新版本的jtidy，它似乎由于未知的原因破坏了我的文档对象。这是我的代码：

tidy = new Tidy();
tidy.setShowWarnings(false);
tidy.setShowErrors(0);
tidy.setQuiet(true);
tidy.setMakeClean(true);

URL url = new URL(url_string);
Document doc = tidy.parseDOM(url.openStream(), null);

String xpath_string = "//table[@id='links']//a";
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xpath.compile(xpath_string);
NodeList n = (NodeList)expr.evaluate(doc, XPathConstants.NODESET);

这就是我得到的错误：

javax.xml.transform.TransformerException: -1
    at com.sun.org.apache.xpath.internal.XPath.execute(Unknown Source)
    at com.sun.org.apache.xpath.internal.XPath.execute(Unknown Source)
    at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.eval(Unknown Source)
    at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.eval(Unknown Source)
    at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.evaluate(Unknown Source)
    at IndoorClimbing.main(IndoorClimbing.java:55)
Caused by: java.lang.ArrayIndexOutOfBoundsException: -1
    at com.sun.org.apache.xml.internal.dtm.ref.ExpandedNameTable.getType(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase.indexNode(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.dom2dtm.DOM2DTM.addNode(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.dom2dtm.DOM2DTM.nextNode(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase._firstch(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase.getFirstChild(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBaseTraversers$ChildTraverser.first(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.AxesWalker.getNextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.AxesWalker.nextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.WalkingIterator.nextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.NodeSequence.nextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.NodeSequence.runTo(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.NodeSequence.setRoot(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.LocPathIterator.execute(Unknown Source)
    ... 6 more
---------
java.lang.ArrayIndexOutOfBoundsException: -1
    at com.sun.org.apache.xml.internal.dtm.ref.ExpandedNameTable.getType(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase.indexNode(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.dom2dtm.DOM2DTM.addNode(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.dom2dtm.DOM2DTM.nextNode(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase._firstch(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase.getFirstChild(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBaseTraversers$ChildTraverser.first(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.AxesWalker.getNextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.AxesWalker.nextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.WalkingIterator.nextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.NodeSequence.nextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.NodeSequence.runTo(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.NodeSequence.setRoot(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.LocPathIterator.execute(Unknown Source)
    at com.sun.org.apache.xpath.internal.XPath.execute(Unknown Source)
    at com.sun.org.apache.xpath.internal.XPath.execute(Unknown Source)
    at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.eval(Unknown Source)
    at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.eval(Unknown Source)
    at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.evaluate(Unknown Source)
    at IndoorClimbing.main(IndoorClimbing.java:55)
--------------- linked to ------------------
javax.xml.xpath.XPathExpressionException
    at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.evaluate(Unknown Source)
    at IndoorClimbing.main(IndoorClimbing.java:55)
Caused by: javax.xml.transform.TransformerException: -1
    at com.sun.org.apache.xpath.internal.XPath.execute(Unknown Source)
    at com.sun.org.apache.xpath.internal.XPath.execute(Unknown Source)
    at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.eval(Unknown Source)
    at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.eval(Unknown Source)
    ... 2 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: -1
    at com.sun.org.apache.xml.internal.dtm.ref.ExpandedNameTable.getType(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase.indexNode(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.dom2dtm.DOM2DTM.addNode(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.dom2dtm.DOM2DTM.nextNode(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase._firstch(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase.getFirstChild(Unknown Source)
    at com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBaseTraversers$ChildTraverser.first(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.AxesWalker.getNextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.AxesWalker.nextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.WalkingIterator.nextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.NodeSequence.nextNode(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.NodeSequence.runTo(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.NodeSequence.setRoot(Unknown Source)
    at com.sun.org.apache.xpath.internal.axes.LocPathIterator.execute(Unknown Source)
    ... 6 more

尝试生成NodeList时，最后一行代码出现错误。有没有人在新版本的JTidy上遇到过这样的问题？

Answer 1

也有类似的问题。我发现了一个相当愚蠢的变通方法(重新解析jTidy输出)，这表明jtidy有问题。

document = tidy.parseDOM(rstream, null); 

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
Source xmlSource = new DOMSource(document);
Result outputTarget = new StreamResult(outputStream);
TransformerFactory.newInstance().newTransformer().transform(xmlSource, outputTarget);
InputStream is = new ByteArrayInputStream(outputStream.toByteArray());

Document doc = db.parse(is);

我花了好几个小时，希望这能帮上忙。

Answer 2

因为错误发生在com.sun.org.apache中，所以我不认为这是JTidy的问题。

试着剥离你的例子，这样你就可以针对XalanJ project提交一个错误报告。