java - Spring 在创建类路径中定义的名为 propertyPlaceholderConfigurer 的 bean 时出错

Question

各位专家

我们使用 ClassPathXmlApplicationContext 在类路径中加载带有 xml 文件的 bean。 它从类路径查找并加载 xml 文件，但在其中一个具有 propertyPlaceholderConfigurer bean 引用类路径中的属性文件的 xml 文件中。它抛出空指针异常，无法创建 propertyPlaceholderConfigurer bean。

不确定它是否读取属性文件，即使它是类路径，因为它可以读取其他 xml 文件？ 属性文件有可能包含损坏的数据吗？ 有关可能出现问题的任何线索吗？

Error creating bean with name 'propertyPlaceholderConfigurer' defined in class path resource [ws.xml]: Initialization of bean failed; nested exception is java.lang.NullPointerException
    at com.ibm.ejs.container.StatelessBeanO.initialize(StatelessBeanO.java:375)
    at com.ibm.ejs.container.BMStatelessBeanOFactory.create(BMStatelessBeanOFactory.java:45)
    at com.ibm.ejs.container.EJSHome.createBeanO(EJSHome.java:1031)
    at com.ibm.ejs.container.EJSHome.createBeanO(EJSHome.java:1141)
    at com.ibm.ejs.container.activator.UncachedActivationStrategy.atActivate(UncachedActivationStrategy.java:84)
    at com.ibm.ejs.container.activator.Activator.activateBean(Activator.java:599)
    at com.ibm.ejs.container.EJSContainer.preInvokeActivate(EJSContainer.java:3964)
    at com.ibm.ejs.container.EJSContainer.preInvoke(EJSContainer.java:3269)
    at com.ibm.websphere.scheduler.EJSRemoteStatelessMeFBatchHandler_fb00fe87.process(EJSRemoteStatelessMeFBatchHandler_fb00fe87.java:27)
    at com.ibm.websphere.scheduler._TaskHandler_Stub.process(_TaskHandler_Stub.java:269)
    at com.ibm.ws.scheduler.tasks.BeanTaskInfoWork.doWork(BeanTaskInfoWork.java:126)
    at com.ibm.ws.scheduler.AlarmListener.executeTaskWithNotification(AlarmListener.java:796)
    at com.ibm.ws.scheduler.AlarmListener.access$700(AlarmListener.java:121)
    at com.ibm.ws.scheduler.AlarmListener$TaskWork.doWork(AlarmListener.java:427)
    at com.ibm.ws.scheduler.AlarmListener$TaskWork.run(AlarmListener.java:213)
    at com.ibm.ws.asynchbeans.J2EEContext.run(J2EEContext.java:782)
    at com.ibm.ws.asynchbeans.ExecutionContextImpl.go(ExecutionContextImpl.java:86)
    at com.ibm.ws.scheduler.AlarmListener.fireTask(AlarmListener.java:1401)
    at com.ibm.ws.scheduler.AlarmListener.fired(AlarmListener.java:1319)
    at com.ibm.ws.asynchbeans.AlarmImpl.callListenerMethod(AlarmImpl.java:340)
    at com.ibm.ws.asynchbeans.timer.GenericTimer.run(GenericTimer.java:216)
    at com.ibm.ws.asynchbeans.J2EEContext.run(J2EEContext.java:1150)
    at com.ibm.ws.asynchbeans.AlarmImpl.runListenerAsCJWork(AlarmImpl.java:175)
    at com.ibm.ws.asynchbeans.am._Alarm.fireAlarm(_Alarm.java:333)
    at com.ibm.ws.asynchbeans.am._Alarm.run(_Alarm.java:230)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1550)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'propertyPlaceholderConfigurer' defined in class path resource [ws.xml]: Initialization of bean failed; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:478)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
    at java.security.AccessController.doPrivileged(AccessController.java:224)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:217)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:516)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:363)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)

Answer 1

new ClassPathXmlApplicationContext(a.xml ,b.xml,c.xml);

返回空指针异常，因为在 c.xml 中定义了 propertyPlaceholderConfigurer bean，它引用了类路径中的属性文件。