在Eclipse中生成WSDL时Java ClassCastException？

时间：2011-02-23 15:31:01

标签： java eclipse web-services wsdl classcastexception

我正在尝试在Eclipse中创建一个新的Web服务（自下而上，apache轴1，tomcat 6），但是在尝试之前我收到警告，然后在之后出现错误。

错误： 

IWAB0398E Error in generating WSDL from Java:  java.lang.ClassCastException: org.apache.axis.encoding.ser.BeanSerializer cannot be cast to org.apache.axis.encoding.Serializer

这是我使用Serializable的地方：

public class IntegrationUtils extends Utilities implements java.io.Serializable {
    private static final long serialVersionUID = 7515033201857603982L;

警告摘要： 很多警告都与我的Web服务类使用的类没有默认构造函数有关。

以下是警告：

The service class "net.abc.Indy.WebService.IntegrationUtils" does not comply to one or more requirements of the JAX-RPC 1.1 specification, and may not deploy or function correctly.
The service class "net.abc.Indy.WebService.IntegrationUtils" does not comply to one or more requirements of the JAX-RPC 1.1 specification, and may not deploy or function correctly.
  The field or property "headers" on the value type "org.apache.axis.AxisFault" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.util.ArrayList", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The field or property "cause" on the value type "java.rmi.RemoteException" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.lang.Throwable", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The field or property "noClasses" on the value type "org.apache.axis.description.TypeDesc" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.lang.Class", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The field or property "noObjects" on the value type "org.apache.axis.description.TypeDesc" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.lang.Object", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The field or property "propertyDescriptorMap" on the value type "org.apache.axis.description.TypeDesc" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.util.Map", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The field or property "type" on the value type "org.apache.axis.utils.BeanPropertyDescriptor" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.lang.Class", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The field or property "actualType" on the value type "org.apache.axis.utils.BeanPropertyDescriptor" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.lang.Class", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The field or property "javaType" on the value type "org.apache.axis.description.FieldDesc" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.lang.Class", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The field or property "headers" on the value type "org.apache.axis.AxisFault" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.util.ArrayList", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The field or property "cause" on the value type "java.rmi.RemoteException" used via the service class "net.abc.Indy.WebService.IntegrationUtils" has a data type, "java.lang.Throwable", that is not supported by the JAX-RPC 1.1 specification. Instances of the type may not serialize or deserialize correctly. Loss of data or complete failure of the Web service may result.
  The value type "org.w3c.dom.Element" used via the service class "net.abc.Indy.WebService.IntegrationUtils" does not have a public default constructor. Chapter 5.4 of the JAX-RPC 1.1 specification requires a value type to have a public default constructor, otherwise a JAX-RPC 1.1 compliant Web service engine may be unable to construct an instance of the value type during deserialization.
  The value type "org.w3c.dom.TypeInfo" used via the service class "net.abc.Indy.WebService.IntegrationUtils" does not have a public default constructor. Chapter 5.4 of the JAX-RPC 1.1 specification requires a value type to have a public default constructor, otherwise a JAX-RPC 1.1 compliant Web service engine may be unable to construct an instance of the value type during deserialization.
  The value type "org.apache.axis.description.TypeDesc" used via the service class "net.abc.Indy.WebService.IntegrationUtils" does not have a public default constructor. Chapter 5.4 of the JAX-RPC 1.1 specification requires a value type to have a public default constructor, otherwise a JAX-RPC 1.1 compliant Web service engine may be unable to construct an instance of the value type during deserialization.
  The value type "org.apache.axis.utils.BeanPropertyDescriptor" used via the service class "net.abc.Indy.WebService.IntegrationUtils" does not have a public default constructor. Chapter 5.4 of the JAX-RPC 1.1 specification requires a value type to have a public default constructor, otherwise a JAX-RPC 1.1 compliant Web service engine may be unable to construct an instance of the value type during deserialization.
  The value type "org.apache.axis.description.FieldDesc" used via the service class "net.abc.Indy.WebService.IntegrationUtils" does not have a public default constructor. Chapter 5.4 of the JAX-RPC 1.1 specification requires a value type to have a public default constructor, otherwise a JAX-RPC 1.1 compliant Web service engine may be unable to construct an instance of the value type during deserialization.

感谢您的帮助！

1 个答案:

答案 0 :(得分：0)

每当有重复的JAR或JAR文件包含相同的类文件时，就会出现ClassCastException。在你的情况下，它也可能是一个不同的Axis版本。当您的tomcat实例化轴类并将此实例发送到您的应用程序时，通常会出现此问题。您在另一侧的应用程序可以使用自己的jar（打包到WAR或EAR中）。而且由于Web或Java EE-Container中多类装载程序的可行性，您可以在同一服务器上同时运行具有自己的jar文件版本的不同Web应用程序。

但是如何解决呢？好吧，在tomcat和你的web应用程序的所有jar中搜索这些类（在StackTrace中显示）并检查，哪一个用于实例化Axis-Requests / -responses。最简单的解决方案是从Web应用程序中删除相关的jar，并针对运行时环境（您的tomcat）的jar编译代码。如果tomcat-jar版本不适用于您的情况，请尝试修补服务器jar。 另一种解决方案可以是Web应用程序/服务器的不同配置，以控制类加载器。

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