Java Autowired@Service不是到处都是空的

我知道这个问题和那个问题有关，但我不能解决我的问题。我有一个带有Spring+Hibernate的应用程序。Hibernate有2个配置（用于客户和管理数据库）。客户的hibernate使用数据库方法支持多租户。我还使用Spring Security。
这是我的租户id解析类：

@Component
public class MyTenantIdentifierResolver implements CurrentTenantIdentifierResolver {

    @Autowired
    private UserService userService;

    public String resolveCurrentTenantIdentifier() {
        User u = (User) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        com.lspsystem.model.User us = userService.getByLogin(u.getUsername());
        return us.getCompany().getTenantId();
    }

    public boolean validateExistingCurrentSessions() {
        return true;
    }
}

这是我的用户服务：

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserDAO userDAO;

    public User get(Integer id) {
        return userDAO.get(id);
    }

    public boolean delete(Integer id) {
        return userDAO.delete(id);
    }

    public void update(User u) {
        userDAO.update(u);
    }

    public List<User> getAll(User u) {
        return userDAO.getAllUsers();
    }

    public User getByLogin(String login) {
        return userDAO.getByLogin(login);
    }
}

请注意，UserService和MyTenantIdResolver属于不同的hibernate配置

更新
客户休眠配置：

@Configuration
@EnableTransactionManagement
@PropertySource(value = {"classpath:customerHibernate.properties"})
public class RemoteDBHibernateConfig {

@Autowired
private Environment environment;

@Bean(name = "customerSessionFactory")
public SessionFactory sessionFactory() throws IOException{
    LocalSessionFactoryBean builder =
            new LocalSessionFactoryBean();
    builder.setDataSource(dataSource1());
    builder.setPackagesToScan("com.lspsystem.model");
    builder.setHibernateProperties(hibernateProperties());
    builder.afterPropertiesSet();

    return builder.getObject();
}

@Bean("defaultDS")
public DataSource dataSource1() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
    dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
    dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
    dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
    return dataSource;
}

private Properties hibernateProperties() {
    Properties properties = new Properties();
    properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
    properties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));
    properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
    properties.put("hibernate.multiTenancy", environment.getRequiredProperty("hibernate.multiTenancy"));
    properties.put("hibernate.multi_tenant_connection_provider", environment.getRequiredProperty("hibernate.multi_tenant_connection_provider"));
    properties.put("hibernate.tenant_identifier_resolver", environment.getRequiredProperty("hibernate.tenant_identifier_resolver"));
    return properties;
}

@Bean
@Autowired
public HibernateTransactionManager transactionManager() throws IOException{
    HibernateTransactionManager txManager = new HibernateTransactionManager();
    txManager.setSessionFactory(sessionFactory());
    return txManager;
}}

@Configuration
@EnableTransactionManagement
@PropertySource(value = {"classpath:adminHibernate.properties"})
public class AdminDBHibernateConfig {

@Autowired
private Environment environment;

@Bean(name = "adminSessionFactory")
public SessionFactory sessionFactory() throws IOException {
    LocalSessionFactoryBean builder =
            new LocalSessionFactoryBean();
    builder.setDataSource(dataSource());
    builder.setPackagesToScan("com.lspsystem.model");
    builder.setHibernateProperties(hibernateProperties());
    builder.afterPropertiesSet();

    return builder.getObject();
}

@Bean
public DataSource dataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName(environment.getRequiredProperty("admin.jdbc.driverClassName"));
    dataSource.setUrl(environment.getRequiredProperty("admin.jdbc.url"));
    dataSource.setUsername(environment.getRequiredProperty("admin.jdbc.username"));
    dataSource.setPassword(environment.getRequiredProperty("admin.jdbc.password"));
    return dataSource;
}

private Properties hibernateProperties() {
    Properties properties = new Properties();
    properties.put("hibernate.dialect", environment.getRequiredProperty("admin.hibernate.dialect"));
    properties.put("hibernate.show_sql", environment.getRequiredProperty("admin.hibernate.show_sql"));
    properties.put("hibernate.format_sql", environment.getRequiredProperty("admin.hibernate.format_sql"));
    properties.put("hibernate.hbm2dll.auto", environment.getRequiredProperty("admin.hibernate.hbm2ddl.auto"));
    return properties;
}

@Bean
@Autowired
public HibernateTransactionManager transactionManager() throws IOException{
    HibernateTransactionManager txManager = new HibernateTransactionManager();
    txManager.setSessionFactory(sessionFactory());
    return txManager;
}}

管理员休眠配置：

@Configuration
@EnableTransactionManagement
@PropertySource(value = {"classpath:customerHibernate.properties"})
public class RemoteDBHibernateConfig {

@Autowired
private Environment environment;

@Bean(name = "customerSessionFactory")
public SessionFactory sessionFactory() throws IOException{
    LocalSessionFactoryBean builder =
            new LocalSessionFactoryBean();
    builder.setDataSource(dataSource1());
    builder.setPackagesToScan("com.lspsystem.model");
    builder.setHibernateProperties(hibernateProperties());
    builder.afterPropertiesSet();

    return builder.getObject();
}

@Bean("defaultDS")
public DataSource dataSource1() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
    dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
    dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
    dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
    return dataSource;
}

private Properties hibernateProperties() {
    Properties properties = new Properties();
    properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
    properties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));
    properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
    properties.put("hibernate.multiTenancy", environment.getRequiredProperty("hibernate.multiTenancy"));
    properties.put("hibernate.multi_tenant_connection_provider", environment.getRequiredProperty("hibernate.multi_tenant_connection_provider"));
    properties.put("hibernate.tenant_identifier_resolver", environment.getRequiredProperty("hibernate.tenant_identifier_resolver"));
    return properties;
}

@Bean
@Autowired
public HibernateTransactionManager transactionManager() throws IOException{
    HibernateTransactionManager txManager = new HibernateTransactionManager();
    txManager.setSessionFactory(sessionFactory());
    return txManager;
}}

@Configuration
@EnableTransactionManagement
@PropertySource(value = {"classpath:adminHibernate.properties"})
public class AdminDBHibernateConfig {

@Autowired
private Environment environment;

@Bean(name = "adminSessionFactory")
public SessionFactory sessionFactory() throws IOException {
    LocalSessionFactoryBean builder =
            new LocalSessionFactoryBean();
    builder.setDataSource(dataSource());
    builder.setPackagesToScan("com.lspsystem.model");
    builder.setHibernateProperties(hibernateProperties());
    builder.afterPropertiesSet();

    return builder.getObject();
}

@Bean
public DataSource dataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName(environment.getRequiredProperty("admin.jdbc.driverClassName"));
    dataSource.setUrl(environment.getRequiredProperty("admin.jdbc.url"));
    dataSource.setUsername(environment.getRequiredProperty("admin.jdbc.username"));
    dataSource.setPassword(environment.getRequiredProperty("admin.jdbc.password"));
    return dataSource;
}

private Properties hibernateProperties() {
    Properties properties = new Properties();
    properties.put("hibernate.dialect", environment.getRequiredProperty("admin.hibernate.dialect"));
    properties.put("hibernate.show_sql", environment.getRequiredProperty("admin.hibernate.show_sql"));
    properties.put("hibernate.format_sql", environment.getRequiredProperty("admin.hibernate.format_sql"));
    properties.put("hibernate.hbm2dll.auto", environment.getRequiredProperty("admin.hibernate.hbm2ddl.auto"));
    return properties;
}

@Bean
@Autowired
public HibernateTransactionManager transactionManager() throws IOException{
    HibernateTransactionManager txManager = new HibernateTransactionManager();
    txManager.setSessionFactory(sessionFactory());
    return txManager;
}}

Web应用程序配置：

@Configuration
@EnableWebMvc
@Import(SecurityConfiguration.class)
public class WebApplicationConfig extends WebMvcConfigurerAdapter{

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}

@Bean
public InternalResourceViewResolver viewResolver(){
    InternalResourceViewResolver view = new InternalResourceViewResolver();
    view.setViewClass(JstlView.class);
    view.setPrefix("/WEB-INF/jsp/");
    view.setSuffix(".jsp");
    return view;
}}

例如，UserDAO：

@Repository
public class UserDAOImpl implements UserDAO {

@Autowired
@Qualifier("adminSessionFactory")
private SessionFactory sessionFactory;

public com.lspsystem.model.User get(Integer id) {
    Session session = sessionFactory.openSession();
    User u = (User)session.load(User.class, id);
    return u;
}

public User getByLogin(String login) {
    Session session = sessionFactory.openSession();
    Query q = session.createQuery("SELECT u FROM User u WHERE u.email = :email");
    q.setParameter("email", login);
    User u = (User)q.list().get(0);
    return u;
}}

---

这不可能是真的

@Autowire

将强制该字段为非空。因此，只有当

MyTenantIdentifierResolver

不是Springbean时，才会出现

userService=null

的情况

---

将MyTenantIdentifierResolver的实例设置为Springbean。

提供您的配置类/文件。是的，请提供您的配置文件。总之，这只是一个想法：一个服务如何能同时拥有两个持久性配置？（如果我了解您的情况公开）添加了我的配置。在这种情况下，Hibernate是否创建并管理MyTenantIdResolver实例本身？我从未使用过该功能，但考虑到您将类名配置为hibernate属性，我高度怀疑是这种情况。我找到了不使用UserService的解决方案，而且一切都很好。所以我认为解析器没有问题……对不起，你是说添加@Bean annotation？@ArtemP。不，该类配置良好。搜索spring配置，找出该类没有被用作Springbean的原因。