java - Spring框架请求范围和单例 Autowiring

Question

我将 OncePerRequestFilter 用于自动连接到 Controller 的“请求”范围内的服务 bean。但我仍然收到此错误。

Error creating bean with name 'fileProcessingService': Scope 'request' is not active for the current thread; consider defining a scoped proxy for this bean if you intend to refer to it from a singleton; nested exception is java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread?

请求范围内的 bean 可以注入(inject)单例 bean 吗？或者问题出在其他地方？

Answer 1

如果您需要在 DispatcherServlet 之外使用请求和 session 作用域的 beans，请将以下内容添加到 web.xml:

<listener>
  <listener-class>
      org.springframework.web.context.request.RequestContextListener
  </listener-class>
</listener>