Spring 为什么不像RequestContextHolder这样的响应没有holder类

为什么Spring没有像RequestContextHolder这样的类用于

HttpServletResponse

？在某些情况下，我需要访问响应对象。例如，spring security正在为成功登录创建InteractiveSuccessEvent。我的事件处理程序需要将一些值正确设置为cookie，我不知道修改

HttpServletResponse

对象的显式方法

Edit：处理程序的示例

@Component
public class ActivityLoginSuccessEventHandler implements ApplicationListener<InteractiveAuthenticationSuccessEvent> {

   @Override
   public void onApplicationEvent(InteractiveAuthenticationSuccessEvent event) {
      //todo cookie
   }
}

@组件
公共类ActivityLoginSAccessEventHandler实现ApplicationListener{
@凌驾
ApplicationEvent上的公共无效（InteractiveAuthenticationSuccessEvent事件）{
//托多饼干
}
}

如果您没有找到更好的解决方案，那么您可以扩展用户名和密码AuthenticationFiter（或者您使用的AuthenticationFilter），这样您就可以访问请求和响应。

我最后使用了一个简单的筛选器

public class ResponseContextHolderFilter extends OncePerRequestFilter {

   @Override
   protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
      try {
         RequestAndResponseContextHolder.response(response);
      } finally {
         filterChain.doFilter(request, response);
      }
   }
}


public class RequestAndResponseContextHolder {

   public static final String RESPONSE_NAME_AT_ATTRIBUTES =
      ServletRequestAttributes.class.getName() + ".ATTRIBUTE_NAME";


   public static HttpServletResponse response() {
      RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
      HttpServletResponse response = null;
      if(requestAttributes != null) {
         ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) requestAttributes;
         response = (HttpServletResponse) servletRequestAttributes.getAttribute(RESPONSE_NAME_AT_ATTRIBUTES, RequestAttributes.SCOPE_REQUEST);
      }
      return response;
   }

   public static HttpServletRequest request() {
      RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
      HttpServletRequest request = null;
      if(requestAttributes != null) {
         ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) requestAttributes;
         request = servletRequestAttributes.getRequest();
      }
      return request;
   }

   public static void response(HttpServletResponse response) {
      RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();

      if(requestAttributes != null) {
         ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) requestAttributes;
         servletRequestAttributes.setAttribute(RESPONSE_NAME_AT_ATTRIBUTES, response, RequestAttributes.SCOPE_REQUEST);
      }
   }
}

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您能显示您的事件处理程序吗？@SotiriosDelimanolis添加了一个示例（（ServletRequestAttributes）RequestContextHolder.getRequestAttributes（））。getResponse（）这样做不行吗@布尼亚明·科斯库纳？