在使用DocumentBuilder.parse解析格式良好的XML时，如何关闭validation？
我正在使用Java 6.我想解析我知道格式正确的XHTML。 因此，我不想对文档中引用的DTD或其他模式进行任何validation。 但是，我无法弄清楚如何关闭validation。 我有
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); factory.setValidating(false); final DocumentBuilder b = factory.newDocumentBuilder(); final InputSource s = new InputSource(new StringReader(str)); org.w3c.dom.Document result = b.parse(s); 但我仍然在最后一行得到例外……
java.net.SocketException: Unexpected end of file from server at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:777) at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:640) at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:774) at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:640) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1195) at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:677) at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(XMLEntityManager.java:1315) at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:1282) at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:283) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(XMLDocumentScannerImpl.java:1194) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(XMLDocumentScannerImpl.java:1090) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:1003) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808) 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:119) at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:235) at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:284) at com.myco.myproj.util.XmlUtilities.getStringAsDocument(XmlUtilities.java:130) at com.myco.myproj.util.NetUtilities.getUrlAsDocument(NetUtilities.java:30) at com.myco.myproj.parsers.impl.AbstractChicagoReaderParser.parsePage(AbstractChicagoReaderParser.java:144) at com.myco.myproj.parsers.impl.AbstractChicagoReaderParser.getEvents(AbstractChicagoReaderParser.java:112) at com.myco.myproj.parsers.impl.ChicagoReaderParserTest.testParser(ChicagoReaderParserTest.java:29) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184) at org.junit.runners.ParentRunner.run(ParentRunner.java:236) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
我不希望我的解析器进入Internet。 我如何禁用它？ 谢谢， – 戴夫
编辑：根据Traroth的建议，我尝试了下面的代码，但得到了相同的exception
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); factory.setValidating(false); final DocumentBuilder builder = factory.newDocumentBuilder(); builder.setEntityResolver(new EntityResolver() { @Override public InputSource resolveEntity(String publicId, String systemId) { return null; } }); final InputSource s = new InputSource(new StringReader(str)); org.w3c.dom.Document result = builder.parse(s);
可能与EntityResolver问题有关。 你可以看看这里：
如何在Java中读取格式良好的XML，但是跳过架构？
以下是创建一个将忽略所有外部引用实体（包括DTD）的DocumentBuilder的方法：
final DocumentBuilder builder = factory.newDocumentBuilder(); builder.setEntityResolver(new EntityResolver() { @Override public InputSource resolveEntity(String publicId, String systemId) { // it might be a good idea to insert a trace logging here that you are ignoring publicId/systemId return new InputSource(new StringReader("")); // Returns a valid dummy source } });