我正在尝试根据 XSD 架构验证某些 XML 输入。解析器可以工作，但是当我 Hook 模式时，出现以下异常。我已经使用外部 validator 验证了测试输入，所以我已经消除了它。有谁知道如何设置一个构建器来验证这种方式？

这是构建器设置代码。

final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setIgnoringElementContentWhitespace(true);
factory.setNamespaceAware(true);
final SchemaFactory sf = 
        SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);

factory.setValidating(true);  
final Schema schema = sf.newSchema(new StreamSource(
        getClass().getResourceAsStream(SCHEMA_PATH)));
factory.setSchema(schema);

builder = factory.newDocumentBuilder();
builder.setErrorHandler(new DefaultErrorHandler());

这是我遇到的错误。

org.xml.sax.SAXParseException: Document is invalid: no grammar found.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:236)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:172)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:382)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:316)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:177)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDispatcher.scanRootElementHook(XMLNSDocumentScannerImpl.java:779)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1794)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:250)
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:292)
    at com.casenet.external.mockclaims.ResponseScriptBuilder.build(ResponseScriptBuilder.java:54)
    at com.casenet.external.mockclaims.ResponseScriptBuilderTest.buildFull(ResponseScriptBuilderTest.java:64)
    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:585)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:74)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:673)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:846)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1170)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
    at org.testng.TestRunner.runWorkers(TestRunner.java:1125)
    at org.testng.TestRunner.privateRun(TestRunner.java:749)
    at org.testng.TestRunner.run(TestRunner.java:600)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:317)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:312)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:274)
    at org.testng.SuiteRunner.run(SuiteRunner.java:223)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1007)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:932)
    at org.testng.TestNG.run(TestNG.java:868)
    at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:110)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:205)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:174)
    at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:85)
    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:585)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:115)

最佳答案

你不需要调用:

setValidating(true);

如果您执行以下操作:

documentBuilderFactory.setSchema(schema);

来自setSchema(Schema) javadocs :

This processing will take effect even if the isValidating() method returns false.

关于java - 使用 DocumentBuilder 验证模式，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5622101/