我的春季网络应用在初始阶段遇到错误：
日志
16:51:09.998 [localhost-startStop-1] WARN org.springframework.web.context.support.AnnotationConfigWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getEntityManagerFactoryBean' defined in tn.alveodata.studyink.configurations.DBConfig: Invocation of init method failed; nested exception is java.lang.NullPointerException
16:51:09.999 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@3ecc315f: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,org.springframework.context.event.internalEventListenerProcessor,org.springframework.context.event.internalEventListenerFactory,appConfig,DBConfig,mvcConfig,availabilityController,companyController,contactController,homeController,instructorController,loginController,profileController,skillController,attachmentDaoImp,certificationDaoImp,companyDaoImp,educationDaoImp,emergencyDaoImp,experienceDaoImp,identityDaoImp,interlocutorDaoImp,linkingDaoImp,mediaStorageDaoImp,personDaoImp,profileDaoImp,sectorDaoImp,attachmentServiceImp,certificationServiceImp,companyServiceImp,educationServiceImp,emergencyServiceImp,experienceServiceImp,identityServiceImp,interlocutorServiceImp,linkingServiceImp,personServiceImp,profileServiceImp,sectorServiceImp,org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration,org.springframework.transaction.config.internalTransactionAdvisor,transactionAttributeSource,transactionInterceptor,org.springframework.transaction.config.internalTransactionalEventListenerFactory,org.springframework.aop.config.internalAutoProxyCreator,getEntityManagerFactoryBean,getJpaVendorAdapter,getDataSource,txManager,exceptionTranslation,org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration,requestMappingHandlerMapping,mvcPathMatcher,mvcUrlPathHelper,mvcContentNegotiationManager,viewControllerHandlerMapping,beanNameHandlerMapping,resourceHandlerMapping,mvcResourceUrlProvider,defaultServletHandlerMapping,requestMappingHandlerAdapter,mvcConversionService,mvcValidator,mvcUriComponentsContributor,httpRequestHandlerAdapter,simpleControllerHandlerAdapter,handlerExceptionResolver,mvcViewResolver,viewResolver]; root of factory hierarchy
16:51:09.999 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DisposableBeanAdapter - Invoking destroy method 'close' on bean with name 'getDataSource'
16:51:10.012 [localhost-startStop-1] ERROR org.springframework.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getEntityManagerFactoryBean' defined in tn.alveodata.studyink.configurations.DBConfig: Invocation of init method failed; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1078)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:857)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:443)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:325)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4743)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5207)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: null
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processFkSecondPassesInOrder(InFlightMetadataCollectorImpl.java:1674)
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processSecondPasses(InFlightMetadataCollectorImpl.java:1583)
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:278)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:858)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:885)
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:353)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:370)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:359)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
我的DBConfig：
package tn.alveodata.studyink.configurations;
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.tomcat.dbcp.dbcp2.BasicDataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableTransactionManagement
@PropertySource({ "classpath:database.properties" })
public class DBConfig {
@Autowired
private Environment env;
@Bean
public LocalContainerEntityManagerFactoryBean getEntityManagerFactoryBean() {
LocalContainerEntityManagerFactoryBean lcemfb = new LocalContainerEntityManagerFactoryBean();
lcemfb.setJpaVendorAdapter(getJpaVendorAdapter());
lcemfb.setDataSource(getDataSource());
lcemfb.setPersistenceUnitName("studyinkJpaPU");
lcemfb.setPackagesToScan("com.dom.entities");
lcemfb.setJpaProperties(jpaProperties());
return lcemfb;
}
@Bean
public JpaVendorAdapter getJpaVendorAdapter() {
JpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
((HibernateJpaVendorAdapter) adapter).setDatabasePlatform("org.hibernate.dialect.PostgreSQLDialect");
return adapter;
}
@Bean
public DataSource getDataSource() {
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName("org.postgresql.Driver");
dataSource.setUrl("jdbc:postgresql://localhost:5432/dbase");
dataSource.setUsername("dbase");
dataSource.setPassword("dbase");
return dataSource;
}
@Bean
public PlatformTransactionManager txManager() {
JpaTransactionManager jpaTransactionManager = new JpaTransactionManager(
getEntityManagerFactoryBean().getObject());
return jpaTransactionManager;
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
private Properties jpaProperties() {
Properties properties = new Properties();
properties.setProperty("hibernate.physical_naming_strategy", "tn.alveodata.studyink.utils.DomainPhysicalNamingStategy");
properties.setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
properties.setProperty("hibernate.format_sql", "false");
properties.setProperty("hibernate.show_sql", "false");
return properties; }
}
在我的dao类中注入em。运用 @PersistenceContext EntityManager em;