如何设置detectHandlerMethodsInAncestorContexts为真？

Question

在spring-webmvc中，AbstractHandlerMethodMapping.java中有一个参数detectHandlerMethodsInAncestorContexts。

其默认值为false。我怎样才能将其设置为真？

Answer 1

在春季4（引导1.5）中，这对我有用：

@Configuration
@ComponentScan(basePackages = "my.app")
class WebpageContext extends WebMvcConfigurationSupport {
    @Override
    protected RequestMappingHandlerMapping createRequestMappingHandlerMapping() {
       RequestMappingHandlerMapping mapping = new RequestMappingHandlerMapping();
       mapping.setDetectHandlerMethodsInAncestorContexts(true); 
       return mapping;
    }
}

（通常，您用@Configuration注释@EnableWebMvc类并扩展@WebMvcConfigurerAdapter，但是它不公开请求映射，因此我们需要直接扩展WebMvcConfigurationSupport。）

Answer 2

只需显式创建RequestMappingHandlerMapping bean并将此值设置为true

@Bean
public RequestMappingHandlerMapping requestMappingHandlerMapping() {
    RequestMappingHandlerMapping requestMappingHandlerMapping = new RequestMappingHandlerMapping();
    requestMappingHandlerMapping.setDetectHandlerMethodsInAncestorContexts(true);
    return requestMappingHandlerMapping;
}