在Spring boot

Question

我已经阅读了有关如何将bean注入到自定义servlet中的相关问题，并且我实现了注入没有范围的bean，但是当我尝试注入会话bean时，它没有被注入并且在我的代码下面用NullPointer打破： / p>

我的自定义过滤器：

@Component
public class MyCustomFilter implements Filter{

    @Inject
    private MyService myService;

    @Inject
    private MyServiceWithSessionScope mySessionService;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
         SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);
    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException  {

        //Works perfect!
        myService.someMethod

       //Is NULL
       mySessionService

    }

My Bean定义：

@Service("MyService")
public class MyService {

我的Bean有范围定义：

@Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
@Component
public class MyServiceWithSessionScope {

我得到的错误并没有帮助我..

java.lang.NullPointerException
at org.springframework.web.context.request.SessionScope.get(SessionScope.java:92)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:337)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.getTarget(CglibAopProxy.java:685)

为什么会这样？有什么方法可以“初始化”会话吗？对不起，我在这里很丢失， 提前谢谢！

编辑：

所以我使用DelegatingFilterProxy注册过滤器，但仍然是Null：

public class MyWebAppInitializer implements WebApplicationInitializer {

public void onStartup(ServletContext servletContext) throws ServletException {
    WebApplicationContext context = getContext();
    servletContext.addListener(new ContextLoaderListener(context)); 

    DelegatingFilterProxy delegatingFilterProxy = new DelegatingFilterProxy();
    delegatingFilterProxy.setBeanName("MyCustomFilter");
    delegatingFilterProxy.setTargetBeanName("MyCustomFilter");

    FilterRegistration.Dynamic myFiler = servletContext.addFilter("MyCustomFilter", delegatingFilterProxy);
    myFiler.addMappingForUrlPatterns(null, false, "/somePath/*");