Java XStream Cannotresolveclasscastexception-将哪个别名放在哪里？

我有一个需要调试的项目，由于一些

XStream

错误，我得到了一个

Cannotresolveclasscastexception

在本文中，我了解到，在这种情况下，应该添加一个xstream别名，但是我不知道该别名的用途和需要。最简单的代码示例是：

import com.thoughtworks.xstream.XStream;

import java.io.FileReader;
import java.io.IOException;



public class Configuration
{
    private static final Configuration ourInstance = new Configuration();
    private ConfigData ourData;
    //original private XStream xStream = new XStream(new DomDriver()); // does not require XPP3 library
    private XStream xStream = new XStream();
    private String configFileDirectory = "C:\\";   
    private String mainConfigurationFile = "MainConfiguration.xml";


    private Configuration()
    {
        // Private to ensure singleton status
    }

    /**
     * Load configuration information.  This method must be called before calling any other
     * methods.
     */
    public static void load()
    {
        ourInstance.loadConfiguration();
    }

    private void loadConfiguration()
    {
        ourData = (ConfigData)loadObject(mainConfigurationFile);
    }

    private Object loadObject(String fileName)
    {
        Object obj = null;
      try
        {
            obj = fromFile(fileName);
        }
        catch (IOException e)
        {
            e.printStackTrace();
            System.exit(1);  // Can't continue without a configuration object

        }
        return obj;
    }

    private Object fromFile(String fileName) throws IOException
    {
        FileReader reader = new FileReader(configFileDirectory + fileName);
        return (Object) xStream.fromXML(reader);
    }

    private static class ConfigData
    {

    }
}

和调用函数：

public class test_main_blabla {
    public static void main(String[] args) {
        Configuration.load();
    }
}

我得到的错误是：

Exception in thread "main" com.thoughtworks.xstream.alias.CannotResolveClassException: data.Configuration$ConfigData : data.Configuration$ConfigData
    at com.thoughtworks.xstream.core.DefaultClassMapper.lookupType(Unknown Source)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.start(Unknown Source)
    at com.thoughtworks.xstream.core.ReferenceByXPathMarshallingStrategy.unmarshal(Unknown Source)
    at com.thoughtworks.xstream.XStream.unmarshal(Unknown Source)
    at com.thoughtworks.xstream.XStream.fromXML(Unknown Source)
    at Configuration.fromFile(Configuration.java:56)
    at Configuration.loadObject(Configuration.java:42)
    at Configuration.loadConfiguration(Configuration.java:34)
    at Configuration.load(Configuration.java:29)
    at test_main_blabla.main(test_main_blabla.java:4)

谁能帮我让这个最小的代码示例工作

---

非常感谢。提前感谢。

请显示您收到的确切错误。它应该显示它无法解析的名称。哦，是的，刚刚更新了帖子。谢谢。也许您只需要将您的

ConfigData

类公开？不，这无助于我假设您的

Configuration

类确实在

data

包中？如果您也能展示您的XML，并且最好是一个简短但完整的程序来演示这个问题，这会有所帮助。