我在将 bean 自动连接到一个类中时遇到了一些困难，该类作为一个 init-param 加载到 OData4j 的 servlet 中。我尝试了许多解决方案，包括加载时间编织，但似乎无法使其正常工作，因为据我了解，作为 init-param 传递给 servlet 的类是在加载 Spring 上下文之前加载的全部。下面是我的配置的当前状态，有没有办法在以这种方式加载的类中进行依赖注入？最终目标是让 ExampleProducerFactory.java（它是 OData servlet 的初始化参数）自动装配 UserDao bean。
我试图只包含每个文件的关键部分，如果需要其他配置信息，请发表评论。
应用程序上下文.xml
<context:component-scan base-package="com.project.core"/>
<context:spring-configured/>
<context:load-time-weaver weaver-class="org.springframework.instrument.classloading.SimpleLoadTimeWeaver" />
web.xml
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<!-- read the XmlWebApplicationContext for spring -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>OData</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.resourceConfigClass</param-name>
<param-value>org.odata4j.producer.resources.ODataResourceConfig</param-value>
</init-param>
<init-param>
<param-name>odata4j.producerfactory</param-name>
<param-value>com.wildgigs.core.odata.ExampleProducerFactory</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>OData</servlet-name>
<url-pattern>/example.svc/*</url-pattern>
</servlet-mapping>
ExampleProducerFactory.java
@Configurable(autowire= Autowire.BY_NAME)
public class ExampleProducerFactory implements ODataProducerFactory {
@Autowired
private UserDao userDao;
@Override
public ODataProducer create(Properties arg0) {
InMemoryProducer producer = new InMemoryProducer("example");
List<User> users = userDao.findAll();
User[] usersArray = new User[users.size()];
users.toArray(usersArray);
final User[] usersArrayFinal = usersArray;
producer.register(User.class, Long.class, "Users", new Func<Iterable<User>>() {
public Iterable<User> apply() {
ThreadGroup tg = Thread.currentThread().getThreadGroup();
while (tg.getParent() != null)
tg = tg.getParent();
return Enumerable.create(usersArrayFinal).take(usersArrayFinal.length);
}
}, "Id");
return producer;
}
}
UserDaoImpl.java
@Repository
public class UserDaoImpl extends GenericDaoImpl<User, Long> implements UserDao, Serializable {
@Transactional(readOnly = true)
public User getByUserName(String userName) {
Query query = getSession().createQuery("FROM User where upper(userName) = :name");
query.setString("name", userName.toUpperCase());
return (User) query.uniqueResult();
}
}