The document describes how to configure Spring MVC to resolve method arguments from the HTTP session. It defines a SessionAttributeArgumentResolver class that implements HandlerMethodArgumentResolver to retrieve attributes from the session based on a key. It also shows how to register the resolver with the WebMvcConfigurer to make it available to controller methods. Finally, it provides an example of how to configure method security in Spring using annotations or Java configuration.

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@Conditionl @ConditionalOnXxx

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@GetMapping
@ResponseBody
public Response get(@Xxx String xxx) {
// do something
}

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public class SessionAttributeArgumentResolver
implements HandlerMethodArgumentResolver {
@Override
public Object resolveArgument(
MethodParameter parameter,
ModelAndViewContainer mavContainer,
NativeWebRequest webRequest,
WebDataBinderFactory binderFactory) throws Exception {
final HttpServletRequest servletRequest =
webRequest.getNativeRequest(HttpServletRequest.class);
final HttpSession session = servletRequest.getSession();
return retrieveSessionAttribute(session, getKey());
}
}
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
@Override
public void addArgumentResolvers(
List<HandlerMethodArgumentResolver> resolvers) {
resolvers.add(new SessionAttributeArgumentResolver(Xxx.class));
}
}

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<—- xml configuration —->
<bean class="j.c.r.s.s.a.c.AccessConditionConfig">
<constructor-arg name=“urlPattern” value="/users/*" />
<constructor-arg name=“voter” ref="roleVoter" />
<constructor-arg name=“accessDeniedHandler” ref="handler" />
</bean>
// JavaConfig
@Bean
@Autowired
public AccessConditionConfig condition(AccessDecisionVoter voter,
AccessDeniedHandler handler) {
return new AccessConditionConfig(“/users/*”, roleVoter, handler);
}

21. Filter
HandlerInterceptorAdapter
AccessDecisionManager
ExceptionTranslationFilter
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url-pattern
(RequestMapping )

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