Question

我正在尝试使用声明要使用的doctype来解析HTML文档过渡性dtd如下：

＆lt;！DOCTYPE html PUBLIC“ - // W3C // DTD XHTML 1.0 Transitional // EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd” ＆GT;

当我在文档上执行Builder.build时，我得到以下异常：

  java.io.IOException: Server returned HTTP response code: 503 for URL: http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd
       at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1305)
       at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
       at org.apache.xerces.impl.XMLEntityManager.startEntity(Unknown Source)
       at org.apache.xerces.impl.XMLEntityManager.startDTDEntity(Unknown Source)
       at org.apache.xerces.impl.XMLDTDScannerImpl.setInputSource(Unknown Source)
       at org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(Unknown Source)
       at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
       at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
       at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
       at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
       at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
       at nu.xom.Builder.build(Builder.java:1127)
       at nu.xom.Builder.build(Builder.java:1019)

如果我删除了doc类型声明，它解析就好了。我可以成功从我的浏览器下载dtd，它告诉我网址有效。我不想删除doc类型声明。是有一种方法告诉建设者不要下载dtd或提供它与另一个dtd？

Answer 1

这解决了这个问题：

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            factory.setValidating(false);
            factory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
            Document document = factory.newDocumentBuilder().parse(is);

Answer 2

快速查看Builder的javadoc，我猜你可以通过构造函数提供一个EntityResolver XMLReader。我会尽量避免让解析器从互联网上下载文件。

在XOM中解析XHTML文档时出现DTD下载错误

2 个答案: