奇怪的 Xerces 方法访问错误

发布于 2024-10-20 19:45:29 字数 1605 浏览 0 评论 0原文

我已在 Xerces 2.9.1 和 Xerces-J-2.11.0 上尝试过此操作，结果相同。

我正在编写一个 Spring3 Webflow 应用程序，使用 Xerces 进行 XML 解析。部署 EAR 时，我遇到问题

Caused by: java.lang.IllegalAccessError: tried to access method org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Lorg/apache/xerces/jaxp/DocumentBuilderFactoryImpl;Ljava/util/Hashtable;Ljava/util/Hashtable;)V from class org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
    at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.setAttribute(Unknown Source)
    at org.springframework.beans.factory.xml.DefaultDocumentLoader.createDocumentBuilderFactory(DefaultDocumentLoader.java:99)
    at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:70)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:388)
    ... 30 more

如果我在 xercesImpl.jar 中的 Java 反编译器中跟踪代码，我可以看到 DocumentBuilderFactoryImpl.setAttribute() 调用尝试创建一个新的 DocumentBuilderImpl，这似乎是 IllegalAccessError 的原因。 DocumentBuilderImpl 的构造函数具有默认（包）访问权限，但 DocumentBuilderImpl 和 DocumentBuilderFactoryImpl 驻留在同一包 (org. apache.xerces.jaxp）。

据我所知，错误发生时没有 SecurityManager 处于活动状态（而且我什至不确定 SecurityManager 是否会影响方法访问权限，我认为这只是为了类加载和资源访问权限）。

任何我能做什么的想法（除了以较少限制的访问权限重新编译 xerces JAR 之外，我想找出问题的根源，而不是解决它！，我也更喜欢使用标准 JAR，其中我能）。

我应该提到，我正在使用 Spring 3.0.5、OC4J 10.0.3.5.0（已采取解决方法以使用 Xerces XML 解析器而不是 Oracle XML 解析器）和 Java 1.6.0-21。

谢谢格雷厄姆

原文

I've tried this on both Xerces 2.9.1, and Xerces-J-2.11.0 with the same results.

I'm writing a Spring3 Webflow app, using Xerces for XML parsing. When deploying the EAR, I get an issue

Caused by: java.lang.IllegalAccessError: tried to access method org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Lorg/apache/xerces/jaxp/DocumentBuilderFactoryImpl;Ljava/util/Hashtable;Ljava/util/Hashtable;)V from class org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
    at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.setAttribute(Unknown Source)
    at org.springframework.beans.factory.xml.DefaultDocumentLoader.createDocumentBuilderFactory(DefaultDocumentLoader.java:99)
    at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:70)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:388)
    ... 30 more

If I trace the code in a Java Decompilor, in xercesImpl.jarI can see the DocumentBuilderFactoryImpl.setAttribute() call tries to create a new DocumentBuilderImpl, this seems to be the cause of the IllegalAccessError. The constructor for the DocumentBuilderImpl has default (package) access, but both DocumentBuilderImpl, and DocumentBuilderFactoryImpl reside in the same package (org.apache.xerces.jaxp).

As far as I'm aware, there is no SecurityManager active at the time of the error (and I'm not even sure whether the SecurityManager would affect method access permissions, I thought it was just for class loading, and resource access permissions).

Any ideas what I can do (short of recompiling the xerces JAR with less restrictive access permissions, I'd like to sort out the root of the problem, not work around it!, I'd also prefer to use the standard JARs where I can).

I should mention, I'm using Spring 3.0.5, OC4J 10.0.3.5.0 (with the work-around in place to use the Xerces XML parser instead of the Oracle XML parser), and Java 1.6.0-21.

Thanks
Graham

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