Question

我想在我的服务上设置@Transactional而不是我的DAO ......为了打开事务并能够在我的服务中使用一些惰性集合而不会得到一些“LazyInitializationException”。

直到现在@Transactional都在DAO上，当进入DAO并退出时，交易被打开和关闭。

现在，在我的服务上使用@Transactional，甚至没有打开交易。所以服务调用DAO时没有打开任何事务，我们得到了以下异常：org.hibernate.SessionException：Session被关闭了！

我们在Hibernate上使用JPA，这是我们配置的摘录：

<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"/>  

<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>

<tx:annotation-driven />

编辑，感谢您的回复/评论：所以，我在整个服务（实现而不是接口）上声明@Transactional而不是方法，以确保@Transactional将适用于所有服务。

@Transactional
public class MyServiceImpl implements MyService {
  public void method1(){...}
  public void method2(){...}
}

我还为您提供了配置DAO的方式，它们都扩展了以下类：

public abstract class JpaDAOSupport {
  protected EntityManager em;
  @PersistenceContext(type = PersistenceContextType.TRANSACTION)
  public void setEm(EntityManager em) {
    this.em = em;
  }
}

EDIT2：我简化了我的应用程序，以便只有1个服务和1个DAO。

为MyService：

@Transactional
public class MyServiceImpl implements MyService {

  private MyDAO myDAO;

  public void setMyDAO(MyDAO myDAO) {
    this.myDAO = myDAO;
  }


  @Override
  public void method1() {
    List<String> things = myDAO.getAll();
    System.out.println("Test size: " + things.size());
  }

  @Override
  public void method2() {
    List<String> things = myDAO.getAll();
    for (String thing : things) {
      System.out.println(thing);
    }
  }
}

MyDAO

@Repository
public class MyDAOImpl extends JpaDAOSupport implements MyDAO {

  @SuppressWarnings("unchecked")
  @Override
  public List<String> getAll() {
    Query query = em.createQuery("FROM " + Cfg.class.getName());
    List<Cfg> result = query.getResultList();
    List<String> realResult = new ArrayList<String>();
    for (Cfg cfg : result) {
      realResult.add(cfg.getKey());
    }
    return realResult;
  }
}

持久性配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">


  <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

  <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>

  <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"/>    

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager" />

  <bean id="my.package.dao.MyDAO" class="my.package.dao.jpa.MyDAOImpl" />

  <bean id="my.package.service.MyService" class="my.package.service.impl.MyServiceImpl" init-method="method1">
    <property name="myDAO" ref="my.package.dao.MyDAO" />
  </bean>
</beans>

请注意，我无权访问tx：annotation-driven。

的属性“mode”

以下是启动模式DEBUG中的弹簧日志：

[...]
k.beans.factory.support.DefaultListableBeanFactory  Creating shared instance of singleton bean 'entityManagerFactory'
k.beans.factory.support.DefaultListableBeanFactory  Creating instance of bean 'entityManagerFactory'
k.beans.factory.support.DefaultListableBeanFactory  Eagerly caching bean 'entityManagerFactory' to allow for resolving potential circular references
g.springframework.beans.CachedIntrospectionResults  Getting BeanInfo for class [org.springframework.orm.jpa.LocalEntityManagerFactoryBean]
g.springframework.beans.CachedIntrospectionResults  Caching PropertyDescriptors for class [org.springframework.orm.jpa.LocalEntityManagerFactoryBean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'beanClassLoader' of type [java.lang.ClassLoader]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'class' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'dataSource' of type [javax.sql.DataSource]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'entityManagerFactoryInterface' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'entityManagerInterface' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'jpaDialect' of type [org.springframework.orm.jpa.JpaDialect]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'jpaProperties' of type [java.util.Properties]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'jpaPropertyMap' of type [java.util.Map]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'jpaVendorAdapter' of type [org.springframework.orm.jpa.JpaVendorAdapter]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'nativeEntityManagerFactory' of type [javax.persistence.EntityManagerFactory]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'object' of type [javax.persistence.EntityManagerFactory]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'objectType' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'persistenceProvider' of type [javax.persistence.spi.PersistenceProvider]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'persistenceProviderClass' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'persistenceUnitInfo' of type [javax.persistence.spi.PersistenceUnitInfo]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'persistenceUnitName' of type [java.lang.String]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'singleton' of type [boolean]
k.beans.factory.support.DefaultListableBeanFactory  Invoking afterPropertiesSet() on bean with name 'entityManagerFactory'
ingframework.orm.jpa.LocalEntityManagerFactoryBean  Building JPA EntityManagerFactory for persistence unit 'null'
ework.web.context.support.XmlWebApplicationContext  Bean 'entityManagerFactory' is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
k.beans.factory.support.DefaultListableBeanFactory  Finished creating instance of bean 'entityManagerFactory'
k.beans.factory.support.DefaultListableBeanFactory  Finished creating instance of bean 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0'
k.beans.factory.support.DefaultListableBeanFactory  Creating shared instance of singleton bean 'org.springframework.aop.config.internalAutoProxyCreator'
k.beans.factory.support.DefaultListableBeanFactory  Creating instance of bean 'org.springframework.aop.config.internalAutoProxyCreator'
org.springframework.core.CollectionFactory          Creating [java.util.concurrent.ConcurrentHashMap]
k.beans.factory.support.DefaultListableBeanFactory  Eagerly caching bean 'org.springframework.aop.config.internalAutoProxyCreator' to allow for resolving potential circular references
g.springframework.beans.CachedIntrospectionResults  Getting BeanInfo for class [org.springframework.aop.framework.autoproxy.InfrastructureAdvisorAutoProxyCreator]
g.springframework.beans.CachedIntrospectionResults  Caching PropertyDescriptors for class [org.springframework.aop.framework.autoproxy.InfrastructureAdvisorAutoProxyCreator]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'advisorAdapterRegistry' of type [org.springframework.aop.framework.adapter.AdvisorAdapterRegistry]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'applyCommonInterceptorsFirst' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'beanClassLoader' of type [java.lang.ClassLoader]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'beanFactory' of type [org.springframework.beans.factory.BeanFactory]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'class' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'customTargetSourceCreators' of type [[Lorg.springframework.aop.framework.autoproxy.TargetSourceCreator;]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'exposeProxy' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'frozen' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'interceptorNames' of type [[Ljava.lang.String;]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'opaque' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'optimize' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'order' of type [int]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'proxyClassLoader' of type [java.lang.ClassLoader]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'proxyTargetClass' of type [boolean]
k.beans.factory.support.DefaultListableBeanFactory  Finished creating instance of bean 'org.springframework.aop.config.internalAutoProxyCreator'
ework.web.context.support.XmlWebApplicationContext  Unable to locate MessageSource with name 'messageSource': using default [org.springframework.context.support.DelegatingMessageSource@7d2796]
ework.web.context.support.XmlWebApplicationContext  Unable to locate ApplicationEventMulticaster with name 'applicationEventMulticaster': using default [org.springframework.context.event.SimpleApplicationEventMulticaster@1335207]
ework.ui.context.support.UiApplicationContextUtils  Unable to locate ThemeSource with name 'themeSource': using default [org.springframework.ui.context.support.ResourceBundleThemeSource@6bbe7]
k.beans.factory.support.DefaultListableBeanFactory  Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1989b5: defining beans [org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor#0,org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0,entityManagerFactory,transactionManager,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,my.package.dao.MyDAO,my.package.service.MyService]; root of factory hierarchy
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor#0'
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0'
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'entityManagerFactory'
k.beans.factory.support.DefaultListableBeanFactory  Creating shared instance of singleton bean 'transactionManager'
k.beans.factory.support.DefaultListableBeanFactory  Creating instance of bean 'transactionManager'
k.beans.factory.support.DefaultListableBeanFactory  Eagerly caching bean 'transactionManager' to allow for resolving potential circular references
g.springframework.beans.CachedIntrospectionResults  Getting BeanInfo for class [org.springframework.orm.jpa.JpaTransactionManager]
g.springframework.beans.CachedIntrospectionResults  Caching PropertyDescriptors for class [org.springframework.orm.jpa.JpaTransactionManager]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'class' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'dataSource' of type [javax.sql.DataSource]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'defaultTimeout' of type [int]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'entityManagerFactory' of type [javax.persistence.EntityManagerFactory]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'failEarlyOnGlobalRollbackOnly' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'globalRollbackOnParticipationFailure' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'jpaDialect' of type [org.springframework.orm.jpa.JpaDialect]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'jpaProperties' of type [java.util.Properties]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'jpaPropertyMap' of type [java.util.Map]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'nestedTransactionAllowed' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'resourceFactory' of type [java.lang.Object]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'rollbackOnCommitFailure' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'transactionSynchronization' of type [int]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'transactionSynchronizationName' of type [java.lang.String]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'validateExistingTransaction' of type [boolean]
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'entityManagerFactory'
k.beans.factory.support.DefaultListableBeanFactory  Creating shared instance of singleton bean 'org.springframework.transaction.config.internalTransactionAdvisor'
k.beans.factory.support.DefaultListableBeanFactory  Creating instance of bean 'org.springframework.transaction.config.internalTransactionAdvisor'
rk.autoproxy.InfrastructureAdvisorAutoProxyCreator  Did not attempt to auto-proxy infrastructure class [org.springframework.transaction.interceptor.BeanFactoryTransactionAttributeSourceAdvisor]
k.beans.factory.support.DefaultListableBeanFactory  Eagerly caching bean 'org.springframework.transaction.config.internalTransactionAdvisor' to allow for resolving potential circular references
g.springframework.beans.CachedIntrospectionResults  Getting BeanInfo for class [org.springframework.transaction.interceptor.BeanFactoryTransactionAttributeSourceAdvisor]
g.springframework.beans.CachedIntrospectionResults  Caching PropertyDescriptors for class [org.springframework.transaction.interceptor.BeanFactoryTransactionAttributeSourceAdvisor]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'advice' of type [org.aopalliance.aop.Advice]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'adviceBeanName' of type [java.lang.String]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'beanFactory' of type [org.springframework.beans.factory.BeanFactory]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'class' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'classFilter' of type [org.springframework.aop.ClassFilter]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'order' of type [int]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'perInstance' of type [boolean]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'pointcut' of type [org.springframework.aop.Pointcut]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'transactionAttributeSource' of type [org.springframework.transaction.interceptor.TransactionAttributeSource]
k.beans.factory.support.DefaultListableBeanFactory  Creating shared instance of singleton bean 'org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0'
k.beans.factory.support.DefaultListableBeanFactory  Creating instance of bean 'org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0'
org.springframework.core.CollectionFactory          Creating [java.util.concurrent.ConcurrentHashMap]
k.beans.factory.support.DefaultListableBeanFactory  Eagerly caching bean 'org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0' to allow for resolving potential circular references
g.springframework.beans.CachedIntrospectionResults  Getting BeanInfo for class [org.springframework.transaction.annotation.AnnotationTransactionAttributeSource]
g.springframework.beans.CachedIntrospectionResults  Caching PropertyDescriptors for class [org.springframework.transaction.annotation.AnnotationTransactionAttributeSource]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'class' of type [java.lang.Class]
k.beans.factory.support.DefaultListableBeanFactory  Finished creating instance of bean 'org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0'
k.beans.factory.support.DefaultListableBeanFactory  Finished creating instance of bean 'org.springframework.transaction.config.internalTransactionAdvisor'
k.beans.factory.support.DefaultListableBeanFactory  Invoking afterPropertiesSet() on bean with name 'transactionManager'
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'org.springframework.transaction.config.internalTransactionAdvisor'
k.beans.factory.support.DefaultListableBeanFactory  Finished creating instance of bean 'transactionManager'
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'org.springframework.aop.config.internalAutoProxyCreator'
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0'
k.beans.factory.support.DefaultListableBeanFactory  Creating shared instance of singleton bean 'org.springframework.transaction.interceptor.TransactionInterceptor#0'
k.beans.factory.support.DefaultListableBeanFactory  Creating instance of bean 'org.springframework.transaction.interceptor.TransactionInterceptor#0'
rk.autoproxy.InfrastructureAdvisorAutoProxyCreator  Did not attempt to auto-proxy infrastructure class [org.springframework.transaction.interceptor.TransactionInterceptor]
k.beans.factory.support.DefaultListableBeanFactory  Eagerly caching bean 'org.springframework.transaction.interceptor.TransactionInterceptor#0' to allow for resolving potential circular references
g.springframework.beans.CachedIntrospectionResults  Getting BeanInfo for class [org.springframework.transaction.interceptor.TransactionInterceptor]
g.springframework.beans.CachedIntrospectionResults  Caching PropertyDescriptors for class [org.springframework.transaction.interceptor.TransactionInterceptor]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'class' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'transactionAttributeSource' of type [org.springframework.transaction.interceptor.TransactionAttributeSource]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'transactionAttributeSources' of type [[Lorg.springframework.transaction.interceptor.TransactionAttributeSource;]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'transactionAttributes' of type [java.util.Properties]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'transactionManager' of type [org.springframework.transaction.PlatformTransactionManager]
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'transactionManager'
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0'
k.beans.factory.support.DefaultListableBeanFactory  Invoking afterPropertiesSet() on bean with name 'org.springframework.transaction.interceptor.TransactionInterceptor#0'
k.beans.factory.support.DefaultListableBeanFactory  Finished creating instance of bean 'org.springframework.transaction.interceptor.TransactionInterceptor#0'
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'org.springframework.transaction.config.internalTransactionAdvisor'
k.beans.factory.support.DefaultListableBeanFactory  Creating shared instance of singleton bean 'my.package.dao.MyDAO'
k.beans.factory.support.DefaultListableBeanFactory  Creating instance of bean 'my.package.dao.MyDAO'
g.springframework.beans.CachedIntrospectionResults  Getting BeanInfo for class [my.package.dao.jpa.JpaDAOSupport]
g.springframework.beans.CachedIntrospectionResults  Caching PropertyDescriptors for class [my.package.dao.jpa.JpaDAOSupport]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'class' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'em' of type [javax.persistence.EntityManager]
amework.beans.factory.annotation.InjectionMetadata  Found injected method on class [my.package.dao.jpa.MyDAOImpl]: PersistenceElement for public void my.package.dao.jpa.JpaDAOSupport.setEm(javax.persistence.EntityManager)
k.beans.factory.support.DefaultListableBeanFactory  Eagerly caching bean 'my.package.dao.MyDAO' to allow for resolving potential circular references
g.springframework.beans.CachedIntrospectionResults  Getting BeanInfo for class [my.package.dao.jpa.MyDAOImpl]
g.springframework.beans.CachedIntrospectionResults  Caching PropertyDescriptors for class [my.package.dao.jpa.MyDAOImpl]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'all' of type [java.util.List]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'class' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'em' of type [javax.persistence.EntityManager]
amework.beans.factory.annotation.InjectionMetadata  Processing injected method of bean 'my.package.dao.MyDAO': PersistenceElement for public void my.package.dao.jpa.JpaDAOSupport.setEm(javax.persistence.EntityManager)
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'entityManagerFactory'
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'org.springframework.transaction.config.internalTransactionAdvisor'
org.springframework.core.CollectionFactory          Creating [java.util.concurrent.ConcurrentHashMap]
g.springframework.aop.framework.JdkDynamicAopProxy  Creating JDK dynamic proxy: target source is SingletonTargetSource for target object [my.package.dao.jpa.MyDAOImpl@1298826]
k.beans.factory.support.DefaultListableBeanFactory  Finished creating instance of bean 'my.package.dao.MyDAO'
k.beans.factory.support.DefaultListableBeanFactory  Creating shared instance of singleton bean 'my.package.service.MyService'
k.beans.factory.support.DefaultListableBeanFactory  Creating instance of bean 'my.package.service.MyService'
k.beans.factory.support.DefaultListableBeanFactory  Eagerly caching bean 'my.package.service.MyService' to allow for resolving potential circular references
g.springframework.beans.CachedIntrospectionResults  Getting BeanInfo for class [my.package.service.impl.MyServiceImpl]
g.springframework.beans.CachedIntrospectionResults  Caching PropertyDescriptors for class [my.package.service.impl.MyServiceImpl]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'class' of type [java.lang.Class]
g.springframework.beans.CachedIntrospectionResults  Found bean property 'myDAO' of type [my.package.dao.MyDAO]
k.beans.factory.support.DefaultListableBeanFactory  Returning cached instance of singleton bean 'my.package.dao.MyDAO'
k.beans.factory.support.DefaultListableBeanFactory  Invoking init method  'method1' on bean with name 'my.package.service.MyService'
anagerCreator$SharedEntityManagerInvocationHandler  Creating new EntityManager for shared EntityManager invocation
.springframework.orm.jpa.EntityManagerFactoryUtils  Closing JPA EntityManager
k.beans.factory.support.DefaultListableBeanFactory  Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1989b5: defining beans [org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor#0,org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0,entityManagerFactory,transactionManager,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,my.package.dao.MyDAO,my.package.service.MyService]; root of factory hierarchy
k.beans.factory.support.DefaultListableBeanFactory  Retrieved dependent beans for bean 'my.package.dao.MyDAO': [my.package.service.MyService]
k.beans.factory.support.DefaultListableBeanFactory  Retrieved dependent beans for bean 'transactionManager': [org.springframework.transaction.interceptor.TransactionInterceptor#0]
k.beans.factory.support.DefaultListableBeanFactory  Retrieved dependent beans for bean 'org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0': [org.springframework.transaction.config.internalTransactionAdvisor, org.springframework.transaction.interceptor.TransactionInterceptor#0]
k.beans.factory.support.DefaultListableBeanFactory  Retrieved dependent beans for bean 'entityManagerFactory': [transactionManager, my.package.dao.MyDAO]
mework.beans.factory.support.DisposableBeanAdapter  Invoking destroy() on bean with name 'entityManagerFactory'
ingframework.orm.jpa.LocalEntityManagerFactoryBean  Closing JPA EntityManagerFactory for persistence unit 'null'
org.springframework.web.context.ContextLoader       Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'my.package.service.MyService' defined in class path resource [config/persistenceContext.xml]: Invocation of init method failed; nested exception is org.springframework.orm.jpa.JpaSystemException: org.hibernate.SessionException: Session is closed!; nested exception is javax.persistence.PersistenceException: org.hibernate.SessionException: Session is closed!

我想了解为什么交易没有打开，我怎么能解决这个问题呢？

谢谢，

Answer 1

听起来可能是以下之一：

您的@Transactional注释位于界面上，并且您使用了错误的代理类型
您在内部调用@Transactional方法

@Transactional docs

Spring建议您只使用@Transactional注释来注释具体类（以及具体类的方法），而不是注释接口。您当然可以将@Transactional注释放在接口（或接口方法）上，但这只能在您使用基于接口的代理时按预期工作。 Java注释不是从接口继承的事实意味着如果您使用基于类的代理（proxy-target-class="true"）或基于编织的方面（mode="aspectj"），那么事务设置将无法被代理和编织基础设施，并且该对象不会被包装在事务代理中，这将是非常糟糕的。

注意   在代理模式（默认设置）下，只拦截通过代理进入的外部方法调用。这意味着自调用实际上是目标对象中调用目标对象的另一个方法的方法，即使被调用的方法标有@Transactional，也不会在运行时导致实际的事务。

编辑：您还应该检查您正在使用的LocalEntityManagerFactoryBean的文档。基于我在那里的快速阅读，似乎你错过了可能需要的财产。它还提到了一些关于编织的细节，这可能在这里起作用。

Spring ORM JPA LocalEntityManagerFactoryBean docs

Answer 2

好的，事实上问题是

配置问题
无法在init-method上打开事务，因为尚未创建（事务性）代理。

适用于1.：

    <!-- transaction manager for use with a single JPA EntityManagerFactory for transactional data access to a single datasource -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"
    p:entityManagerFactory-ref="entityManagerFactory" 
/>

<!-- uses the persistence unit defined in the META-INF/persistence.xml JPA configuration file -->
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
p:dataSource-ref="dataSource">
    <property name="jpaProperties">
        <props>
            <prop key="hibernate.dialect">${hibernate.dialect}</prop>
            <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
            <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
        </props>
    </property>
</bean>


<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"
    p:driverClassName="${dataSource.driverClassName}"
    p:url="${dataSource.url}"
    p:username="${dataSource.username}"
    p:password="${dataSource.password}"
/>

约2：

使用TransactionTemplate
注册ApplicationListener并侦听ContextRefreshedEvent

Answer 3

看起来像旧的代理问题。 - 使用真正的AspectJ编织而不是Spring Proxy的东西来解决问题（永远）。

@see：Spring: Annotation-driven Transaction Manager

Answer 4

除上述原因外，这也可能是JRE版本的问题。其实我遇到了同样的问题。应用程序在JRE 6中正常运行，但是当我迁移到JRE 7时，它引发了这个异常。

解决方案：指定Tomcat显式使用JRE 6（使用Eclipse）而不是JRE 7

Spring Transaction无法在服务上打开

4 个答案: