javax.persistence.TransactionRequiredException：没有实际事务可用于当前线程的EntityManager

我使用Hibernate创建了我的第一个Spring MVC项目。我的DAO层使用JPA EntityManager与数据库进行交互。javax.persistence.TransactionRequiredException：没有实际事务可用于当前线程的EntityManager

GenericDao.java：

@Repository 
public abstract class GenericDao<T> implements GeneralDao<T> { 

    private Class<T> className; 

    public GenericDao(Class<T> className) { 
     this.className = className; 
    } 

    @PersistenceContext 
    private EntityManager entityManager; 

    public EntityManager getEntityManager() { 
     return entityManager; 
    } 

    @Override 
    public void add(T object) { 
     try { 
      getEntityManager().persist(object); 
     } catch (HibernateException e) { 
      throw new DaoException(ErrorMessage.ADD_ENTITY_FAIL, e); 
     } 
    } 

    @Override 
    public void update(T object) { 
     try { 
      getEntityManager().merge(object); 
     } catch (HibernateException e) { 
      throw new DaoException(ErrorMessage.UPDATE_ENTITY_FAIL, e); 
     } 
    } 

    @Override 
    public void remove(T object) { 
     try { 
      getEntityManager().remove(object); 
     } catch (HibernateException e) { 
      throw new DaoException(ErrorMessage.REMOVE_ENTITY_FAIL, e); 
     } 
    } 

    @Override 
    public T getById(int id) { 
     try { 
      return getEntityManager().find(this.className, id); 
     } catch (HibernateException e) { 
      throw new DaoException(ErrorMessage.GET_BY_ID_ENTITY_FAIL, e); 
     } 
    } 

    public abstract List<T> getAll() throws DaoException; 

}

GenericService.java

@Service 
public abstract class GenericService<T> implements GeneralService<T> { 
    private static Logger logger = Logger.getLogger(GenericService.class); 

    @Autowired 
    private GenericDao<T> dao; 

    @Transactional 
    @Override 
    public void add(T object) throws ServiceException { 
     try { 
      dao.add(object); 
     } catch (DaoException e) { 
      logger.debug(e); 
      throw new ServiceException(e.getMessage()); 
     } 
    } 

    @Transactional 
    @Override 
    public void update(T object) throws ServiceException { 
     try { 
      dao.update(object); 
     } catch (DaoException e) { 
      logger.debug(e); 
      throw new ServiceException(e.getMessage()); 
     } 
    } 

    @Transactional 
    @Override 
    public void remove(T object) throws ServiceException { 
     try { 
      dao.remove(object); 
     } catch (DaoException e) { 
      logger.debug(e); 
      throw new ServiceException(e.getMessage()); 
     } 
    } 

    @Transactional(readOnly = true) 
    @Override 
    public T getById(int id) throws ServiceException { 
     try { 
      return dao.getById(id); 
     } catch (DaoException e) { 
      logger.debug(e); 
      throw new ServiceException(e.getMessage()); 
     } 
    } 

    @Transactional(readOnly = true) 
    @Override 
    public List<T> getAll() throws ServiceException { 
     try { 
      return dao.getAll(); 
     } catch (DaoException e) { 
      logger.debug(e); 
      throw new ServiceException(e.getMessage()); 
     } 
    } 

}

UserServiceImpl.java：

@Service 
public class UserServiceImpl extends GenericService<User> implements UserService { 
    private static Logger logger = Logger.getLogger(UserServiceImpl.class); 

    @Autowired 
    private UserDao userDao; 

    @Transactional 
    @Override 
    public String checkUser(String userLogin, String userPassword) throws ServiceException { 
     String namePage = "errorAuthorization"; 
     List<User> userList; 
     try { 
      userList = userDao.getByLoginAndPassword(userLogin, userPassword); 
     } catch (DaoException e) { 
      logger.debug(e); 
      throw new ServiceException(e.getMessage()); 
     } 
     if(userList.size() != 0) { 
      return UserRoleChecker.defineUserPage(userList.get(0)); 
     } 
     return namePage; 
    } 

    @Transactional 
    @Override 
    public void addUser(String userLogin, String userPassword, String userMail) throws ServiceException { 
     Role role = new Role(0L, RoleType.USER); 
     User user = new User(0L, userLogin, userPassword, userMail, role); 
     add(user); 
    } 

}

UserController.java：

@Controller 
public class UserController { 
    private static String className = UserController.class.getName(); 
    private static Logger logger = Logger.getLogger(UserController.class.getName()); 

    @Autowired 
    private UserService userService; 

    @RequestMapping(value = "/check_user", method = RequestMethod.POST) 
    public ModelAndView authorizationUser(HttpServletRequest request, HttpServletResponse response) { 
     ModelAndView modelAndView = new ModelAndView(); 
     String returnPage; 
     try { 
      returnPage = userService.checkUser(request.getParameter(RequestParameter.USER_LOGIN), request.getParameter(RequestParameter.USER_PASSWORD)); 
     } catch (ServiceException e) { 
      logger.debug(e); 
      returnPage = ErrorHandler.returnErrorPage(e.getMessage(), className); 
     } 
     modelAndView.setViewName(returnPage); 
     return modelAndView; 
    } 

    @RequestMapping(value = "/add_user", method = RequestMethod.POST) 
    public ModelAndView registrationUser(HttpServletRequest request, HttpServletResponse response) { 
     ModelAndView modelAndView = new ModelAndView(); 
     String returnPage = Page.SUCCESSFUL_REGISTRATION; 
     try { 
      userService.addUser(request.getParameter(RequestParameter.USER_LOGIN), request.getParameter(RequestParameter.USER_PASSWORD), request.getParameter(RequestParameter.USER_MAIL)); 
     } catch (ServiceException e) { 
      logger.debug(e); 
      returnPage = ErrorHandler.returnErrorPage(e.getMessage(), className); 
     } 
     modelAndView.setViewName(returnPage); 
     return modelAndView; 
    } 

}

根context.xml中：

<?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:p="http://www.springframework.org/schema/p" 
     xmlns:c="http://www.springframework.org/schema/c" 
     xmlns:context="http://www.springframework.org/schema/context" 
     xmlns:util="http://www.springframework.org/schema/util" 
     xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx" 
     xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd 
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd 
     http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd 
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> 

    <context:annotation-config /> 

    <context:component-scan base-package="by.netcracker.artemyev.dao" /> 
    <context:component-scan base-package="by.netcracker.artemyev.service" /> 
    <context:component-scan base-package="by.netcracker.artemyev.web" /> 

    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"> 
     <property name="url" value="jdbc:mysql://localhost:3306/airline?useSSL=false" /> 
     <property name="driverClassName" value="com.mysql.jdbc.Driver"/> 
     <property name="username" value="root"/> 
     <property name="password" value="root"/> 
     <property name="initialSize" value="5"/> 
     <property name="maxTotal" value="10"/> 
    </bean> 

    <bean id="entityManager" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="dataSource" ref="dataSource" /> 
     <property name="packagesToScan" value="by.netcracker.artemyev" /> 
     <property name="jpaVendorAdapter"> 
      <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
       <property name="showSql" value="true" /> 
       <property name="database" value="MYSQL" /> 
       <property name="databasePlatform" value="org.hibernate.dialect.MySQL5Dialect" /> 
      </bean> 
     </property> 
     <property name="jpaProperties"> 
      <props> 
       <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> 
       <prop key="hibernate.show_sql">true</prop> 
       <prop key="debug">true</prop> 
       <prop key="connection.isolation">2</prop> 
       <prop key="hibernate.cglib.use_reflection_optimizer">true</prop> 
       <prop key="hibernate.hbm2ddl.auto">update</prop> 
      </props> 
     </property> 
     <property name="jpaDialect" ref="jpaDialect" /> 
    </bean> 

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

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

    <bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" /> 

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

</beans>

日志：

org.springframework.web.servlet.FrameworkServlet 2017-05-10 22:23:59,107 DEBUG - Could not complete request 
javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'persist' call 
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:282) 
    at com.sun.proxy.$Proxy27.persist(Unknown Source) 
    at by.netcracker.artemyev.dao.GenericDao.add(GenericDao.java:35) 
    at by.netcracker.artemyev.service.GenericService.add(GenericService.java:24) 
    at by.netcracker.artemyev.service.impl.UserServiceImpl.addUser(UserServiceImpl.java:48) 
    at by.netcracker.artemyev.web.UserController.registrationUser(UserController.java:45) 
    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.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) 
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) 
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) 
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) 
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) 
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341) 
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:495) 
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) 
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:767) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1354) 
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:745)

为什么我有这样的问题，以及如何解决它？

来源

2017-05-10 studentST

我的投票是关于配置。 –

根据您的堆栈跟踪，我们可以看到事务拦截器不在位，这就是为什么没有活动事务。所以有一些错误的配置。我会说检查哪个'@ Transaction'注释是否使用Spring或Javax。 – Babl

你能展示扩展GenericDao的类吗？ – abaghel

你已经在你的问题中显示root-context.xml但这个上下文文件没有ViewResolver bean配置。您必须具有在web.xml中配置的Dispatcher Servlet的Servlet上下文配置文件（例如dispatcher-servlet.xml）。请将以下配置添加到您的dispatcher-servlet.xml。

<tx:annotation-driven />

如果你没有在你的dispatcher-servlet.xmlxmlns:tx定义，就像其他xmlns:定义，然后将其添加。请确保您在dispacher servlet上下文中具有适当的组件扫描配置。

<context:component-scan base-package="by.netcracker.artemyev.*" />

您也可以参考张贴有类似的问题已报告@Transactional doesn't work in Spring Web MVC?。

来源

2017-05-14 12:47:31 abaghel

javax.persistence.TransactionRequiredException：没有实际事务可用于当前线程的EntityManager

回答

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