使用 Classpath 中定义的名称 propertyPlaceholderConfigurer 创建 bean 时出现 Spring 错误

Question

各位专家

我们正在使用 ClassPathXmlApplicationContext 在类路径中加载带有 xml 文件的 bean。 它从类路径中查找并加载 xml 文件，但在具有 propertyPlaceholderConfigurer bean 引用类路径中的属性文件的 xml 文件之一中。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？ 属性文件有损坏数据的机会吗？ 关于可能是什么问题的任何线索？

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n 因为在 c.xml 中定义了 propertyPlaceholderConfigurer bean，它引用了类路径中的属性文件。

Answer 2

检查您的 Spring 库。如果它们的版本混合/不匹配，则删除旧版本的 jar 并替换为新版本的 jar。