2

当我尝试将 JAXB 对象编组为 XML 时出现此错误。JAXBContext 无法找到我正在传递的类。我被困在这里。非常感谢这方面的任何帮助。

Exception in thread "main" java.lang.InternalError
    at com.sun.xml.internal.bind.v2.model.annotation.RuntimeInlineAnnotationReader.getClassValue(RuntimeInlineAnnotationReader.java:128)
    at com.sun.xml.internal.bind.v2.model.annotation.RuntimeInlineAnnotationReader.getClassValue(RuntimeInlineAnnotationReader.java:42)
    at com.sun.xml.internal.bind.v2.model.impl.PropertyInfoImpl.isApplicable(PropertyInfoImpl.java:201)
    at com.sun.xml.internal.bind.v2.model.impl.PropertyInfoImpl.getApplicableAdapter(PropertyInfoImpl.java:212)
    at com.sun.xml.internal.bind.v2.model.impl.PropertyInfoImpl.<init>(PropertyInfoImpl.java:111)
    at com.sun.xml.internal.bind.v2.model.impl.SingleTypePropertyInfoImpl.<init>(SingleTypePropertyInfoImpl.java:60)
    at com.sun.xml.internal.bind.v2.model.impl.AttributePropertyInfoImpl.<init>(AttributePropertyInfoImpl.java:48)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeAttributePropertyInfoImpl.<init>(RuntimeAttributePropertyInfoImpl.java:43)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeClassInfoImpl.createAttributeProperty(RuntimeClassInfoImpl.java:144)
    at com.sun.xml.internal.bind.v2.model.impl.ClassInfoImpl.addProperty(ClassInfoImpl.java:851)
    at com.sun.xml.internal.bind.v2.model.impl.ClassInfoImpl.findFieldProperties(ClassInfoImpl.java:387)
    at com.sun.xml.internal.bind.v2.model.impl.ClassInfoImpl.getProperties(ClassInfoImpl.java:290)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeClassInfoImpl.getProperties(RuntimeClassInfoImpl.java:165)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:212)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:89)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:178)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:84)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:293)
    at com.sun.xml.internal.bind.v2.model.impl.TypeRefImpl.calcRef(TypeRefImpl.java:81)
    at com.sun.xml.internal.bind.v2.model.impl.TypeRefImpl.getTarget(TypeRefImpl.java:58)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeTypeRefImpl.getTarget(RuntimeTypeRefImpl.java:47)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeTypeRefImpl.getTarget(RuntimeTypeRefImpl.java:40)
    at com.sun.xml.internal.bind.v2.model.impl.ElementPropertyInfoImpl$1.get(ElementPropertyInfoImpl.java:63)
    at com.sun.xml.internal.bind.v2.model.impl.ElementPropertyInfoImpl$1.get(ElementPropertyInfoImpl.java:61)
    at java.util.AbstractList$Itr.next(AbstractList.java:345)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:224)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:89)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:178)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:84)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:293)
    at com.sun.xml.internal.bind.v2.model.impl.TypeRefImpl.calcRef(TypeRefImpl.java:81)
    at com.sun.xml.internal.bind.v2.model.impl.TypeRefImpl.getTarget(TypeRefImpl.java:58)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeTypeRefImpl.getTarget(RuntimeTypeRefImpl.java:47)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeTypeRefImpl.getTarget(RuntimeTypeRefImpl.java:40)
    at com.sun.xml.internal.bind.v2.model.impl.ElementPropertyInfoImpl$1.get(ElementPropertyInfoImpl.java:63)
    at com.sun.xml.internal.bind.v2.model.impl.ElementPropertyInfoImpl$1.get(ElementPropertyInfoImpl.java:61)
    at java.util.AbstractList$Itr.next(AbstractList.java:345)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:224)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:89)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:178)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:84)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:70)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:293)
    at com.sun.xml.internal.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:308)
    at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.java:430)
    at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:277)
    at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1100)
    at com.sun.xml.internal.bind.v2.ContextFactory.createContext(ContextFactory.java:143)
    at com.sun.xml.internal.bind.v2.ContextFactory.createContext(ContextFactory.java:110)
    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 javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:202)
    at javax.xml.bind.ContextFinder.find(ContextFinder.java:376)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:574)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:522)
    at src.example.MarshalCommlAuto.main(MarshalCommlAuto.java:48)
4

2 回答 2

1

当您JAXBContext从 Java 类创建一个时，JAXB impl 还将为所有可以从它访问的类创建元数据（包括属性类型、超类和注释中指定的类）。它不会打包扫描或拉入子类，因此需要注意确保为模型中的所有类生成元数据。

如果您的模型是从 XML 模式生成的，那么您应该JAXBContext从生成的包名称中创建。为确保正确加载类，您还应该指定正确的ClassLoader. 假设您的包名称是com.example.foo您可以执行以下操作。

JAXBContext jc = JAXBContext.newInstance("com.example.foo", CommlAutoPolicyInfoType.class.getClassLoader());

如果您的生成模型跨越多个包，您可以使用:字符分隔上下文路径中的包。

JAXBContext jc = JAXBContext.newInstance("com.example.foo:com.example.bar", CommlAutoPolicyInfoType.class.getClassLoader());

了解更多信息

于 2013-06-17T12:35:31.540 回答
0

我遇到了类似的问题，这是公司内部大型项目之一的一些传递依赖的问题（但我没有得到 ClassNotFound 异常，而是指向无处的 InternalError ）。即使我使用了@Blaise 建议的提示，它也没有开始工作。

那么 - 我如何解决这个问题？首先 - 我添加了-verbose:classto 命令行以跟踪加载的类。有了这个，我发现我的 jaxb 包中的一些类（可能是那个示例包：）"com.example.foo"由于某种原因没有被加载。因此，我为 jaxb 包中的那些未加载类添加了示例导入，并在代码上进行了简单使用，例如：

ExampleNotLoadedClass.class.getName();

最终在加载此类期间使用上面的代码，我收到了ClassNotFound来自不同包的类的异常。它应该包含在该工件的一些传递依赖项中，但由于某种原因，这不起作用（我认为没关系，我只会说我们正在划分我们的大项目并将一些工件提取到不同的子项目中） .

因此，我已将缺少的类依赖项直接添加到该有问题的工件中，并且一切都开始正常工作。

我希望它可以帮助遇到类似问题的人。

于 2016-03-11T10:41:51.210 回答