调用spring的org.springframework.context.support.ClassPathXmlApplicationContext时发生java.lang.reflect.InvocationTargetException

Question

这是我正在处理的代码，它在运行时使用为构造函数提供的参数实例化和创建对象。

private static void createInstancesFromSpecfication() {
    String[] specifierFileNames = resourceMap.get("instances");
    if (null == specifierFileNames)
        return;
    List<SpecifierObjects> instances = new ArrayList<SpecifierObjects>();
    for (int i = 0; i < specifierFileNames.length; i++) {
        try {
            instances.addAll(XMLFileUtility.readXML(specifierFileNames[i],
                    new ClassInstantiationHandler()));
        } catch (ResourceNotAvailableException | DocumentException
                | ResourceDataFailureException e) {
            e.printStackTrace();
        }
    }
    for (Iterator<SpecifierObjects> iterator = instances.iterator(); iterator
            .hasNext();) {
        InstanceSpecifierObject instanceSpecifierObject = (InstanceSpecifierObject) iterator
                .next();
        try {
            Class<?> cast = Class.forName(instanceSpecifierObject
                    .getInterfaceName());
            Class<?> clazz = Class.forName(instanceSpecifierObject
                    .getClassName());
            Constructor<?> constructor = clazz
                    .getConstructor(String[].class);
            String[] param = instanceSpecifierObject.getFilesName();
            for (int i = 0; i < param.length; i++)
                System.out.println(param[i]);
            Type[] params = constructor.getGenericParameterTypes();
            for (int i = 0; i < params.length; i++)
                System.out.println(params[i]);
            Object obj = constructor.newInstance(new Object[] { param });
            objects.put(instanceSpecifierObject.getObjectName(),
                    cast.cast(obj));
        } catch (ClassNotFoundException | InstantiationException
                | IllegalAccessException | IllegalArgumentException
                | InvocationTargetException | NoSuchMethodException
                | SecurityException e) {
            e.printStackTrace();
        }
    }
}

我遇到以下异常：

instances=/home/kranti/workspace/CoreLibs/src/instanceSpecification.xml
/home/kranti/workspace/CoreLibs/src/instanceSpecification.xml
content.xml
notext.xml
class [Ljava.lang.String;
Sep 26, 2014 4:15:32 PM org.springframework.context.support.AbstractApplicationContext         prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@cb6b0a: startup date [Fri Sep 26 16:15:32 IST 2014]; root of context hierarchy
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    at com.framew.confinit.ApplicationResource.createInstancesFromSpecfication(ApplicationResource.java:102)
    at com.framew.confinit.ApplicationResource.importResource(ApplicationResource.java:59)
    at com.framew.confinit.ApplicationResource.main(ApplicationResource.java:41)
Caused by: java.lang.ExceptionInInitializerError
    at org.springframework.context.support.AbstractRefreshableApplicationContext.createBeanFactory(AbstractRefreshableApplicationContext.java:194)
    at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:127)
    at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:458)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:388)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
    ... 7 more
Caused by: java.lang.NullPointerException
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.<clinit>(DefaultListableBeanFactory.java:103)
    ... 13 more

输入，即传递给构造函数的参数值是{content.xml，notext.xml}。我不确定为什么会发生这种异常。

感谢任何帮助。提前谢谢。