Question

我可以找到，但我无法保存我的实体。

Tomcat上下文：

      <Resource name="jdbc/spring" auth="Container" type="javax.sql.DataSource"
           maxTotal="100" maxIdle="30" maxWaitMillis="10000"
           username="spring" password="spring" driverClassName="com.mysql.jdbc.Driver"
           url="jdbc:mysql://localhost:3306/spitter"/>

DatabaseConfig和jpa config：

@Configuration
public class DatabaseConfig {

    @Bean
    public JndiObjectFactoryBean dataSource(){
        JndiObjectFactoryBean jndiObjectFactoryBean = new JndiObjectFactoryBean();
        jndiObjectFactoryBean.setJndiName("jdbc/spring");
        jndiObjectFactoryBean.setResourceRef(true);
        jndiObjectFactoryBean.setProxyInterface(javax.sql.DataSource.class);
        return jndiObjectFactoryBean;
    }

    @Bean
    public JpaVendorAdapter jpaVendorAdapter(){
        HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
        adapter.setDatabase(Database.MYSQL);
        adapter.setGenerateDdl(false);
        adapter.setShowSql(true);
        adapter.setDatabasePlatform("org.hibernate.dialect.MySQL5Dialect");
        return adapter;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource, JpaVendorAdapter adapter){
        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean =
                new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setDataSource(dataSource);
        entityManagerFactoryBean.setJpaVendorAdapter(adapter);
        entityManagerFactoryBean.setPackagesToScan("com.springinaction.spittr");
        entityManagerFactoryBean.setJpaProperties(jpaProperties());
        return  entityManagerFactoryBean;
    }

    @Bean
    public PersistenceAnnotationBeanPostProcessor paPostProcessor(){
        return new PersistenceAnnotationBeanPostProcessor();
    }

    @Bean
    public BeanPostProcessor persistenceTranslation(){
        return new PersistenceExceptionTranslationPostProcessor();
    }

    private Properties jpaProperties(){
        Properties properties = new Properties();
        properties.put("hibernate.hbm2ddl.auto", "create-drop");
        return properties;
    }

和DAO：

@Repository
@Transactional
public class UserRepositoryImpl implements UserRepository {

    @PersistenceContext
    private EntityManager entityManager;

    @Override
    public User findUser(Long id) {
        return entityManager.find(User.class, id);
    }

    @Override
    public User findUserByUsername(String username) {
        return (User)entityManager.createQuery("Select u from User u where username= :username ")
                .setParameter("username", username)
                .getSingleResult();
    }

    @Override
    public void addUser(User user) {
        entityManager.persist(user);
    }
}

服务：

@Service
public class UserService implements UserDetailsService {

    @Autowired
    private UserRepository userRepository;

    @Override
    public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
        User user = new User();
        user.setUsername("admin");
        user.setPassword("admin");
        Role role = new Role();
        role.setRole("ADMIN");
        Role role2 = new Role();
        role2.setRole("USER");
        HashSet set = new HashSet();
        set.add(role);
        set.add(role2);
        user.setRoles(set);
        userRepository.addUser(user);
        return userRepository.findUserByUsername(s);
    }
}

当我到达userRepository.addUser（用户）时，没有实体保存到我的数据库中，并且我得到了没有实体事务可用异常的EntityManager。

我哪里错了？

Answer 1

好的，我没有在我的配置上放置@EnableTransactionManagement（）。关闭

Spring ORM JNDI Tomcat - 没有可用实际事务的EntityManager

1 个答案: