我正在尝试将 EntityManagerFactory 注入我的 JUnit 测试用例：
@PersistenceContext
private EntityManager em;
@Bean
public EntityManager EntityManager() {
return em;
}
@Autowired
private EntityManagerFactory emf;
@Bean
public EntityManagerFactory EntityManagerFactory() {
return emf;
}
但我得到了 NPE：
在允许 TestExecutionListener [org.springframework.test.context.support.DependencyInjectionTestExecutionListener@5d465e4b] 准备测试实例 [com.technologies.rest.FilterActivityTest3@53e211ee] java.lang.IllegalStateException 时捕获异常：无法在 org.springframework 加载 ApplicationContext。 test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124) 在 org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83) 在 org.springframework.test.context.support.DependencyInjectionTestExecutionListener。在 org.springframework.test.context.support.DependencyInjectionTestExecutionListener 上的 injectDependencies(DependencyInjectionTestExecutionListener.java:117)。prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228) at org .springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287) 在 org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 在 org.springframework.test.context。 junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren (ParentRunner.java:288) 在 org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 在 org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 在 org.springframework.test。 context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run( ParentRunner.java:363) 在 org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) 在 org.eclipse.jdt.internal.junit4。runner.JUnit4TestReference.run(JUnit4TestReference.java:89) 在 org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41) 在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner。 runTests(RemoteTestRunner.java:542) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner. java:464) 在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)runTests(RemoteTestRunner.java:770) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.爪哇：210）runTests(RemoteTestRunner.java:770) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.爪哇：210） 原因：org.springframework.beans.factory.BeanCreationException：创建名为“testConfig”的bean时出错：注入持久性依赖项失败；嵌套异常是java.lang.NullPointerException at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessPropertyValues(PersistenceAnnotationBeanPostProcessor.java:357) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1268) at org. springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:551) 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:481) 在 org.springframework.beans.factory.support。 AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312) 在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 位于 org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 的 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) .beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:764) 在 org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) 在 org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext .java:542) 在 org.springframework.test.context.support.AbstractGenericContextLoader 的 org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:128)。loadContext(AbstractGenericContextLoader.java:60) at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.delegateLoading(AbstractDelegatingSmartContextLoader.java:281) at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext(AbstractDelegatingSmartContextLoader.java:249)在 org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98) 在 org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) ... 省略了 25 个常用帧281）在org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal（DefaultCacheAwareContextLoaderDelegate.java:98）在org.springframework.test的org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext（AbstractDelegatingSmartContextLoader.java:249） .context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) ...省略了25个常用帧281）在org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal（DefaultCacheAwareContextLoaderDelegate.java:98）在org.springframework.test的org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext（AbstractDelegatingSmartContextLoader.java:249） .context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) ...省略了25个常用帧DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) ...省略了25个常用帧DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) ...省略了25个常用帧 引起：java.lang.NullPointerException：null 在 org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.(SharedEntityManagerCreator.java:194) 在 org.springframework.orm.jpa 的 org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.initProxyClassLoader(SharedEntityManagerCreator.java:202)。 SharedEntityManagerCreator.createSharedEntityManager(SharedEntityManagerCreator.java:165) at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor$PersistenceElement.resolveEntityManager(PersistenceAnnotationBeanPostProcessor.java:719) at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor$PersistenceElement.getResourceToInject( PersistenceAnnotationBeanPostProcessor.java:680) 在 org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement。在 org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessPropertyValues(PersistenceAnnotationBeanPostProcessor.java:354) 的 org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) 的注入(InjectionMetadata.java:171) ...省略了41个常用框架
我正在使用 Spring（不是 Spring Boot）和 JUnit 的新手。请指教。谢谢。