Spring erstellt keine sessonFactory-Bean

Question

Ich verwende keine XML-Dateien in meiner App, sondern eine Config-Klasse. Beim Versuch, meine App auszuführen, erhalte ich die folgende Fehlermeldung: Instanz [org.springframework.orm.hibernate5.LocalSessionFactoryBean konnte nicht instanziiert werden ]: Die Factory-Methode 'getSessionFactory' hat eine Ausnahme ausgelöst. verschachtelte Ausnahme ist java.lang.NullPointerException.

@Component 
public interface FooService { 
    public void add(Foo body); 
} 

    @Service 
    public class FooServiceImpl implements FooService { 

     @Autowired 
     FooDao dao; 

     @Transactional 
     @Override 
     public void add(Foo body) { 
     dao.add(body); 
     } 
    } 


public interface FooDao { 
    void add(Foo body); 
} 

@Repository 
public class FooDaoImpl implements FooDao{ 

    @Autowired 
    private SessionFactory sessionFactory; 

    @Override 
    public void add(Foo body) { 
    sessionFactory.getCurrentSession().save(body); 
    } 
} 

Ich dachte, ich die Anmerkungen in meinen Klassen gemischt, aber ging durch ein paar Antworten auf Stackoverflow, verglichen die @Autowired Felder und haben keine Unterschiede bemerkt. Vielleicht kann ich hier keinen kleinen Fehler bemerken, was ist falsch umgesetzt worden?

Meine Config-Klasse ist ein ziemlich Standard ein:

@Configuration 
@PropertySource("classpath:db.properties") 
@EnableTransactionManagement 
@ComponentScans(value = { 
    @ComponentScan("pl.coderstrust.hibernate"), 
}) 
public class AppConfig { 

    @Autowired 
    private Environment env; 

    @Bean 
    public DataSource getDataSource() { 
    BasicDataSource dataSource = new BasicDataSource(); 
    dataSource.setDriverClassName(env.getProperty("dspring.datasource.driver-class-name")); 
    dataSource.setUrl(env.getProperty("spring.datasource.url")); 
    dataSource.setUsername(env.getProperty("spring.datasource.username")); 
    dataSource.setPassword(env.getProperty("spring.datasource.password")); 
    return dataSource; 
    } 

    @Bean 
    public LocalSessionFactoryBean getSessionFactory() { 
    LocalSessionFactoryBean factoryBean = new LocalSessionFactoryBean(); 
    factoryBean.setDataSource(getDataSource()); 

    Properties props = new Properties(); 
    props.put("spring.jpa.show-sql", env.getProperty("hibernate.show_sql")); 
    props.put("spring.jpa.hibernate.ddl-auto", env.getProperty("hibernate.hbm2ddl.auto")); 

    factoryBean.setHibernateProperties(props); 
    factoryBean.setAnnotatedClasses(Foo.class); 
    return factoryBean; 
    } 

    @Bean 
    public HibernateTransactionManager getTransactionManager() { 
    HibernateTransactionManager transactionManager = new HibernateTransactionManager(); 
    transactionManager.setSessionFactory(getSessionFactory().getObject()); 
    return transactionManager; 
    } 
} 

Voll Stack-Trace:

Exception in thread "main" org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'invoiceController': Unsatisfied dependency expressed through field 'impl'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'invoiceServiceImpl': Unsatisfied dependency expressed through field 'dao'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'invoiceDaoImpl': Unsatisfied dependency expressed through field 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getSessionFactory' defined in pl.coderstrust.hibernate.AppConfig: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.hibernate5.LocalSessionFactoryBean]: Factory method 'getSessionFactory' threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) 
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) 
    at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:84) 
    at pl.coderstrust.Application.main(Application.java:24) 
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'invoiceServiceImpl': Unsatisfied dependency expressed through field 'dao'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'invoiceDaoImpl': Unsatisfied dependency expressed through field 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getSessionFactory' defined in pl.coderstrust.hibernate.AppConfig: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.hibernate5.LocalSessionFactoryBean]: Factory method 'getSessionFactory' threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) 
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) 
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) 
    ... 14 more 
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'invoiceDaoImpl': Unsatisfied dependency expressed through field 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getSessionFactory' defined in pl.coderstrust.hibernate.AppConfig: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.hibernate5.LocalSessionFactoryBean]: Factory method 'getSessionFactory' threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) 
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) 
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) 
    ... 27 more 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getSessionFactory' defined in pl.coderstrust.hibernate.AppConfig: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.hibernate5.LocalSessionFactoryBean]: Factory method 'getSessionFactory' threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) 
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) 
    ... 40 more 
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.hibernate5.LocalSessionFactoryBean]: Factory method 'getSessionFactory' threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) 
    ... 52 more 
Caused by: java.lang.NullPointerException 
    at java.util.Hashtable.put(Hashtable.java:459) 
    at pl.coderstrust.hibernate.AppConfig.getSessionFactory(AppConfig.java:47) 
    at pl.coderstrust.hibernate.AppConfig$$EnhancerBySpringCGLIB$$2fc92ee1.CGLIB$getSessionFactory$1(<generated>) 
    at pl.coderstrust.hibernate.AppConfig$$EnhancerBySpringCGLIB$$2fc92ee1$$FastClassBySpringCGLIB$$3496d4d1.invoke(<generated>) 
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) 
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) 
    at pl.coderstrust.hibernate.AppConfig$$EnhancerBySpringCGLIB$$2fc92ee1.getSessionFactory(<generated>) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) 
    ... 53 more 

Answer 1

Blick auf AppConfig # getSessionFactory Methode. java.util.Hashtable # put wirft NPE, wenn einer der Schlüssel des Werts null ist. So müssen Sie sicherstellen, dass hibernate.show_sql und hibernate.hbm2ddl.auto sind ordnungsgemäß festgelegt, wenn Sie Ihre Anwendung ausführen.