ClassCastException异常的期间行家JAXB代码生成铸造DTMManagerDefault到DTMManager

Question

试图运行使用JAXB2插件做JAXB代码生成一个Maven构建时，我有一个奇怪的问题（参见下面的堆栈跟踪）。最好的，我可以计算的是，有DTMManager的一些实现，是从不同的JAR比在xalan的-2.7.1装是类;不过，我已经验证了一个用于运行JAXB类路径：生成的目标只有一个xalan的-2.7.1.jar包含DTMManager或DTMManagerDefault - 所以我不知道还有什么可能的方式越来越

最后一个数据点：我们的构建指定“快照”轮廓，这确实仅用于也JAR了源（使用maven - 源插件）和它们发布为伪像。我上述中所描述的故障情形仅当在除了默认指定了该简档进行。

我使用Maven 2.2.1在Linux的x64（Fedora 13的）Sun的64位JDK 1.6.0_21运行 - 看到堆栈跟踪为 'MVN -v' 信息如下

任何什么问题可能是和/或如何去调试它的想法？这已经引起了我的悲伤，过去几天，它现在阻碍进展：（

java.lang.ClassCastException: org.apache.xml.dtm.ref.DTMManagerDefault cannot be cast to org.apache.xml.dtm.DTMManager
    at org.apache.xml.dtm.DTMManager.newInstance(DTMManager.java:137)
    at org.apache.xpath.XPathContext.<init>(XPathContext.java:102)
    at org.apache.xpath.jaxp.XPathImpl.eval(XPathImpl.java:207)
    at org.apache.xpath.jaxp.XPathImpl.evaluate(XPathImpl.java:281)
    at com.sun.tools.xjc.reader.internalizer.Internalizer.buildTargetNodeMap(Internalizer.java:224)
    at com.sun.tools.xjc.reader.internalizer.Internalizer.buildTargetNodeMap(Internalizer.java:289)
    at com.sun.tools.xjc.reader.internalizer.Internalizer.transform(Internalizer.java:134)
    at com.sun.tools.xjc.reader.internalizer.Internalizer.transform(Internalizer.java:96)
    at com.sun.tools.xjc.reader.internalizer.DOMForest.transform(DOMForest.java:448)
    at com.sun.tools.xjc.ModelLoader.buildDOMForest(ModelLoader.java:342)
    at com.sun.tools.xjc.ModelLoader.loadXMLSchema(ModelLoader.java:374)
    at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:167)
    at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:113)
    at org.jvnet.jaxb2.maven2.XJC2Mojo.runXJC(XJC2Mojo.java:1119)
    at org.jvnet.jaxb2.maven2.XJC2Mojo.execute(XJC2Mojo.java:720)
...

MVN -v：

# mvn -v
Apache Maven 2.2.1 (r801777; 2009-08-06 14:16:01-0500)
Java version: 1.6.0_21
Java home: /usr/java/jdk1.6.0_21/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux" version: "2.6.33.3-85.fc13.x86_64" arch: "amd64" Family: "unix"

Answer 1

的解决方案是寻找在类路径上Xalan和xercesImpl所有依赖性。这些依赖关系应排除在外。

<强>更新

我发现这样一个答案 - 见 HTTP：// www.mail-archive.com/dev@qpid.apache.org/msg07295.html

Had a look at this closely and figured it was due to a classpath class
due to Sun bundling an older version of Xalan jar.
I have disabled this test until we come up with a decent solution.

Rajith

Answer 2

要排除在Maven中的xalan和xercesImpl依赖关系：

    <dependency> <!-- ClassNotFoundException: org.jaxen.dom.DOMXPath -->
        <groupId>jaxen</groupId>
        <artifactId>jaxen</artifactId>
        <version>1.1.3</version>
        <exclusions>
            <exclusion>
                <artifactId>maven-findbugs-plugin</artifactId>
                <groupId>maven-plugins</groupId>
            </exclusion>
            <exclusion>
                <artifactId>maven-cobertura-plugin</artifactId>
                <groupId>maven-plugins</groupId>
            </exclusion>
            <!-- ClassCastException: org.apache.xml.dtm.ref.DTMManagerDefault -> org.apache.xml.dtm.DTMManager -->
            <exclusion>
                <artifactId>xercesImpl</artifactId>
                <groupId>xerces</groupId>
            </exclusion>
            <exclusion>
                <artifactId>xalan</artifactId>
                <groupId>xalan</groupId>
            </exclusion>
        </exclusions>
    </dependency>

参见 https://community.jboss.org/wiki/FreeMarkerAndJBossAS7 。