编组时出现JAXB错误

时间：2013-06-17 11:56:03

标签： jaxb marshalling

当我尝试将JAXB对象封送到XML时，我收到此错误。 JAXBContext无法找到我传递的类。我被困在这里。 在这方面的任何帮助都非常感谢。

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)

2 个答案:

答案 0 :(得分：1)

当您从Java类创建JAXBContext时，JAXB impl还将为所有类创建元数据（如果可以从中获取）（包括注释中指定的属性类型，超类和类）。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，那么您应该从生成的包名称创建JAXBContext。要确保正确加载类，还应指定正确的ClassLoader。假设您的包名为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generate模型跨越多个包，则使用:字符在上下文路径中分隔包。

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

了解更多信息

答案 1 :(得分：0)

我遇到了类似的问题，这就是公司内部大项目之一的传递依赖问题（但我没有得到ClassNotFound异常，但是那个指向无处的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 - 我已将-verbose:class添加到命令行以便跟踪加载的类。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。所以我已经为jaxb包中的那些非加载类添加了示例导入，并在代码上使用了简单的用法，例如：

ExampleNotLoadedClass.class.getName();

上面的代码最后在加载这个类的过程中，我收到了来自不同包的类的ClassNotFound异常。它应该包含在这个工件的一些传递依赖项中，但由于某种原因，这不起作用（我认为它并不重要，我只会说我们正在划分我们的大项目并提取一些工件到不同的子项目。）

所以我已经添加了直接缺少类依赖关系到这个有问题的工件，一切都已经开始正常工作了。

我希望它可以帮助遇到类似问题的人。

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