Spring Java配置。交易問題

Question

我用java配置Spring應用：

@Controller 
@RequestMapping("/") 
public class MainController { 

    @Inject 
    @Named("dbDaoService") 
    IDaoService dbDaoService; 

    @RequestMapping(value="/saveNoteAsync", method = RequestMethod.POST) 
    public @ResponseBody String saveNoteAsync(@RequestBody CreateRequest createRequest, HttpServletRequest request) { 
     Notes newNote = new Notes(
      createRequest.getTitle(), 
      createRequest.getNote(), 
      tagService.getTagMask(createRequest.getTags()) 
     ); 

     Long newId = dbDaoService.createNotes(newNote); 
     return ""+newId; 
    } 

} 

DBService：

@Service("dbDaoService") 
public class DBDaoService implements IDaoService { 

@PersistenceContext(unitName = "MyEntityManager") 
private EntityManager entityManager; 

private List<Tags> tags = null; 

@Override 
@Transactional 
public Long createNotes(Notes data) { 
     entityManager.persist(data); 

     return data.getId(); 
    } 
} 

配置類

@Configuration 
@EnableWebMvc 
@ComponentScan("ru.mypackage") 
public class WebConfig extends WebMvcConfigurerAdapter { 

@Override 
public void addResourceHandlers(ResourceHandlerRegistry registry) { 
    registry.addResourceHandler("/WEB-INF/views/**").addResourceLocations("/views/"); 
} 

@Bean 
public InternalResourceViewResolver getViewResolver() { 
    InternalResourceViewResolver resolver = new InternalResourceViewResolver(); 
    resolver.setPrefix("/WEB-INF/views/"); 
    resolver.setSuffix(".jsp"); 
    resolver.setViewClass(JstlView.class); 

    return resolver; 
} 

@Bean 
public BasicDataSource getBasicDataSource(){ 
    BasicDataSource bds = new BasicDataSource(); 
    bds.setDriverClassName("com.mysql.jdbc.Driver"); 
    bds.setUrl("jdbc:mysql://localhost:3306/test"); 
    bds.setUsername("root"); 
    bds.setPassword("root"); 

    return bds; 
} 

@Bean 
public HibernateJpaVendorAdapter getHibernateJpaVendorAdapter(){ 
    HibernateJpaVendorAdapter hjva = new HibernateJpaVendorAdapter(); 
    hjva.setShowSql(true); 
    hjva.setGenerateDdl(true); 
    hjva.setDatabasePlatform("org.hibernate.dialect.MySQLDialect"); 

    return hjva; 
} 

@Bean 
public LocalContainerEntityManagerFactoryBean getEntityManagerFactory() { 
    LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean(); 
    em.setPersistenceUnitName("MyEntityManager"); 
    em.setDataSource(getBasicDataSource()); 
    em.setJpaVendorAdapter(getHibernateJpaVendorAdapter()); 
    em.setPackagesToScan("ru.eastwind.persistance"); 

    return em; 
} 

@Bean 
public HibernateJpaDialect getHibernateJpaDialect(){ 
    return new HibernateJpaDialect(); 
} 

@Bean 
public JpaTransactionManager getJpaTransactionManager(){ 
    JpaTransactionManager jtm = new JpaTransactionManager(); 
    jtm.setEntityManagerFactory(getEntityManagerFactory().getObject()); 
    jtm.setJpaDialect(getHibernateJpaDialect()); 

    return jtm; 
} 
} 

在線路entityManager.persist（數據）;我得到的錯誤：

javax.persistence.TransactionRequiredException：沒有

但所有選擇查詢沃金的正確的事務EntityManager的！請幫忙。

Answer 1

使用@EnableTransactionManagement上@Configuration類

@Configuration 
@EnableWebMvc 
@ComponentScan("ru.mypackage") 
@EnableTransactionManagement 
public class WebConfig extends WebMvcConfigurerAdapter { 
    // ... Your code 
} 

另請參見：在事務管理豆http://docs.spring.io/spring/docs/3.1.x/javadoc-api/org/springframework/transaction/annotation/EnableTransactionManagement.html