春季jpa休眠写入数据库失败 - 无事务

Question

我有以下问题。我使用Spring和JPA（Hibernate）将数据保存在数据库中。
但我在保存数据时发生错误。创建新用户后，我的数据库保持空白。这里有重要的文件：

UserDao Interface: 

import java.util.List; 

public interface UserDao { 
    public User findById(Integer id); 
    public List<User> findAll(); 
    public User findByEmail(String email); 
    public void save(User user); 
} 

在UserDAOImpl：

@Repository 
public class UserDaoImpl implements UserDao { 

    @PersistenceContext 
    private EntityManager em; 

    @Override 
    public User findById(Integer id) { 
     return em.find(User.class, id); 
    } 

    @SuppressWarnings("unchecked") 
    @Override 
    public List<User> findAll() { 
     return (List<User>)em.createQuery("from User u").getResultList(); 
    } 

    @Override 
    public User findByEmail(String email) { 
     User user = null; 
     try 
     { 
      user =  (User)em.createQuery("from User u where u.email = ?1").setParameter(1, email).getSingleResult(); 
     } 
     catch(NoResultException e){} 
     return user; 
    } 

    @Override 
    @Transactional 
    public void save(User user) { 
     em.persist(user); 
    } 
} 

的context.xml

<?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:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd" default-autowire="byName"> 

<context:component-scan base-package="de.bht.swp.lao.ocp" /> 
<context:annotation-config /> 

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
    <property name="username" value="root" /> 
    <property name="password" value="root" /> 
    <property name="driverClassName" value="com.mysql.jdbc.Driver" /> 
    <property name="url" value="jdbc:mysql://localhost/ocp" /> 
</bean> 

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
    <property name="persistenceUnitName" value="ocpPU" /> 
    <property name="dataSource" ref="dataSource"/> 
    <property name="jpaVendorAdapter"> 
    <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
     <property name="showSql" value="true" /> 
     <property name="generateDdl" value="true" /> 
     <property name="databasePlatform" value="org.hibernate.dialect.MySQL5InnoDBDialect" /> 
    </bean> 
    </property> 
    <property name="loadTimeWeaver" ref="loadTimeWeaver"></property> 
</bean> 

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

<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/> 

<context:load-time-weaver weaver- class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver"/> 

</beans> 

的persistence.xml

<?xml version="1.0" encoding="UTF-8"?> 
    <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"> 
    <persistence-unit name="ocpPU"> 
</persistence-unit> 

当我创建一个新的用户我得到以下错误日志：

14:42:05,703 DEBUG [org.hibernate.event.def.AbstractSaveEventListener] - delaying identity-insert due to no transaction in progress 
14:42:05,704 DEBUG [org.springframework.orm.jpa.EntityManagerFactoryUtils] - Closing JPA EntityManager 
14:42:05,707 DEBUG [org.springframework.web.servlet.DispatcherServlet] - Rendering view  [org.springframework.web.servlet.view.RedirectView: unnamed; URL [/user/login.htm]] in   DispatcherServlet with name 'dispatcher' 
14:42:05,708 DEBUG [org.springframework.web.servlet.DispatcherServlet] - Successfully completed request 

我认为这是一个错误Trancation。 我已经花了很多时间在其他渠道。什么意思是“由于没有进行交易而延迟身份认证”？

感谢您的帮助提前 问候

Answer 1

的问题是@Repository在UserDAOImpl中，删除，使豆

<bean id="userDao" class="de.bht.swp.lao.ocp.user.UserDaoImpl" /> 

在你的context.xml

我不能解释这种行为，但这是原因。