创建 Spring bean 时的未知属性 accessExternalDTD

Question

我继承了一个维护很差的旧（15 年）Java 应用程序。 Mavenizing 没有正确完成，所以我确实试了一下，因为很多库都是手动添加到类路径中的。 现在我有一个主 pom，它在 pom 文件中将所有库作为依赖项。

错误如下：

init 方法调用失败； 嵌套异常是 java.lang.IllegalArgumentException: Unknown attribute http://javax.xml.XMLConstants/property/accessExternalDTD

但是现在我在启动我的网络服务时遇到了一些解析器问题。 旧项目对 XML 使用 SaxParser，但它也使用 Spring，我在初始化 bean 时看到冲突。

我已经升级到 Java 8（也在 Liberty Profile 上运行，因为我们使用 IBM JDK 8 绑定到 IBM）。 添加了 jaxp-api 以获取类路径上的“accessExternalDTD”属性。 删除了 xerces 实现（也从 xalan 依赖项中排除），但没有任何效果。

[err] JAXP: find factoryId=javax.xml.parsers.DocumentBuilderFactory
[err] JAXP: found service provider by ServiceLoader, value=org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
2019-01-21 11:18:35 DEBUG CalculationExecutor:186 -    0.000 CalculationExecutor.new: begin

2019-01-21 11:18:35 DEBUG Loader:50 - Trying to find [project-calculationKernel.xml] using context classloader: com.ibm.ws.classloading.internal.ThreadContextClassLoader@c5d35d81.

2019-01-21 11:18:35 DEBUG Loader:56 - Found: wsjar:file:/C:/LogFiles/Tools/wlp-webProfile8-java8-win-x86_64-18.0.0.4/wlp/usr/servers/Server18.0.0.4/apps/expanded/CreditRiskWebServicesEAR.ear/CreditRiskWebServices.war/WEB-INF/lib/RiskRatingCalculation-17.0.48-SNAPSHOT.jar!/project-calculationKernel.xml

2019-01-21 11:18:35 INFO  BaseCastorMappingMarshaller:33 - Castor version used by Castor Mapping Marshaller: 1.2  [0]

2019-01-21 11:18:35 DEBUG Loader:50 - Trying to find [castorMapping-projectConfiguration.xml] using context classloader: com.ibm.ws.classloading.internal.ThreadContextClassLoader@c5d35d81.

2019-01-21 11:18:35 DEBUG Loader:56 - Found: wsjar:file:/C:/LogFiles/Tools/wlp-webProfile8-java8-win-x86_64-18.0.0.4/wlp/usr/servers/Server18.0.0.4/apps/expanded/CreditRiskWebServicesEAR.ear/CreditRiskWebServices.war/WEB-INF/lib/CalculationKernelSE-17.0.48-SNAPSHOT.jar!/castorMapping-projectConfiguration.xml

[err] JAXP: find factoryId=javax.xml.parsers.SAXParserFactory
[err] JAXP: found service provider by ServiceLoader, value=org.apache.xerces.jaxp.SAXParserFactoryImpl
[err] JAXP: find factoryId=javax.xml.parsers.SAXParserFactory
[err] JAXP: found service provider by ServiceLoader, value=org.apache.xerces.jaxp.SAXParserFactoryImpl
2019-01-21 11:18:35 DEBUG CalculationExecutor:186 -    0.00691 CalculationExecutor.new: end

[err] JAXP: find factoryId=javax.xml.parsers.DocumentBuilderFactory
[err] JAXP: found service provider by ServiceLoader, value=org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
[err] JAXP: find factoryId=javax.xml.transform.TransformerFactory
[err] Warning: external object model net.sf.saxon.dom.DOMEnvelope has been loaded, but is not an instance of net.sf.saxon.om.ExternalObjectModel
[err] Warning: external object model net.sf.saxon.dom.DOMObjectModel has been loaded, but is not an instance of net.sf.saxon.om.ExternalObjectModel
[err] JAXP: found service provider by ServiceLoader, value=net.sf.saxon.TransformerFactoryImpl
[ERROR   ] SRVE0283E: Exception caught while initializing context: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'soapRiskApprovalService' defined in ServletContext resource [/WEB-INF/applicationContext-creditRiskWebServices.xml]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Unknown attribute http://javax.xml.XMLConstants/property/accessExternalDTD
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1745)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
    at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$136.00000000124ED300.getObject(Unknown Source)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:400)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103)
    at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:2376)
    at [internal classes]
Caused by: java.lang.IllegalArgumentException: Unknown attribute http://javax.xml.XMLConstants/property/accessExternalDTD
    at net.sf.saxon.Configuration.setConfigurationProperty(Configuration.java:2185)
    at net.sf.saxon.TransformerFactoryImpl.setAttribute(TransformerFactoryImpl.java:342)
    at org.springframework.xml.transform.TransformerFactoryUtils.defaultSettings(TransformerFactoryUtils.java:56)
    at org.springframework.xml.transform.TransformerFactoryUtils.newInstance(TransformerFactoryUtils.java:32)
    at org.springframework.xml.transform.TransformerHelper.newTransformerFactory(TransformerHelper.java:88)
    at org.springframework.xml.transform.TransformerHelper.getTransformerFactory(TransformerHelper.java:104)
    at org.springframework.xml.transform.TransformerHelper.createTransformer(TransformerHelper.java:119)
    at org.springframework.xml.transform.TransformerHelper.transform(TransformerHelper.java:131)
    at org.springframework.xml.transform.TransformerObjectSupport.transform(TransformerObjectSupport.java:96)
    at org.springframework.ws.wsdl.wsdl11.provider.InliningXsdSchemaTypesProvider.getSchemaElement(InliningXsdSchemaTypesProvider.java:113)
    at org.springframework.ws.wsdl.wsdl11.provider.InliningXsdSchemaTypesProvider.addTypes(InliningXsdSchemaTypesProvider.java:101)
    at org.springframework.ws.wsdl.wsdl11.ProviderBasedWsdl4jDefinition.afterPropertiesSet(ProviderBasedWsdl4jDefinition.java:234)
    at org.springframework.ws.wsdl.wsdl11.DefaultWsdl11Definition.afterPropertiesSet(DefaultWsdl11Definition.java:183)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1804)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1741)
    ... 15 more

我用谷歌搜索了很多，但我找不到任何可以启动这个旧应用程序的方法。 希望有人确实遇到过同样的问题，并能指出我如何处理这个问题。

Answer 1

您的问题似乎与SWS-1049 有关，它是在 spring-ws 3.0.6.RELEASE 中引入的。 你需要使用 3.0.7.BUILD-SNAPSHOT 代替。

Answer 2

尝试从 JDK 8 设置TransformerFactory。JBoss 中存在一个问题，但代码快照应该以相同的方式工作https://stackoverflow.com/a/55304023/204950

Answer 3

我在旧代码中遇到了同样的问题，其中删除 SaxonJ 或其他依赖项不是一种选择。

我最终通过添加系统属性来定义要实例化的默认 TransformerFactory 来遵循TransformerFactory::newInstance 文档：

-Djavax.xml.transform.TransformerFactory=com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl

注意：示例使用 OpenJDK8，您必须找到所需的TransformerFactoryImpl包