spring 添加controller返回值绑定

@EnableWebMvc
@Configuration
public class Config {

    @Autowired
    private RequestMappingHandlerAdapter handlerAdapter;

    @PostConstruct
    public void init() {
        List<HandlerMethodReturnValueHandler> handlers = new ArrayList<>(handlerAdapter.getReturnValueHandlers());
        List<HttpMessageConverter<?>> messageConverters = new ArrayList<>();
        messageConverters.add(new MappingJackson2HttpMessageConverter());
        handlers.add(0, new ResultResponseHandlerMethodProcessor(messageConverters));
        handlerAdapter.setReturnValueHandlers(handlers);

        handlerAdapter.getCustomReturnValueHandlers().add(0, new ResultResponseHandlerMethodProcessor(messageConverters));

        handlerAdapter.afterPropertiesSet();
    }

}

public class ResultResponseHandlerMethodProcessor extends RequestResponseBodyMethodProcessor {

    public ResultResponseHandlerMethodProcessor(List<HttpMessageConverter<?>> messageConverters) {
        super(messageConverters);
    }

    public ResultResponseHandlerMethodProcessor(List<HttpMessageConverter<?>> messageConverters, ContentNegotiationManager contentNegotiationManager) {
        super(messageConverters, contentNegotiationManager);
    }

    @Override
    public boolean supportsReturnType(final MethodParameter returnType) {
        return returnType.getParameterType() == ResponseResult.class;
    }

    @Override
    public void handleReturnValue(final Object returnValue, final MethodParameter returnType, final ModelAndViewContainer mavContainer, final NativeWebRequest webRequest) throws IOException, HttpMediaTypeNotAcceptableException {
        super.handleReturnValue(returnValue, returnType, mavContainer, webRequest);
    }

}

spring相关核心类：

org.springframework.context.support.AbstractApplicationContext#finishBeanFactoryInitialization

org.springframework.beans.factory.support.DefaultListableBeanFactory#preInstantiateSingletons

org.springframework.context.support.AbstractApplicationContext#refresh

mvcUriComponentsContributor

spring bean容器
org.springframework.context.annotation.CommonAnnotationBeanPostProcessor#injectionMetadataCache


org.springframework.web.servlet.config.AnnotationDrivenBeanDefinitionParser.CompositeUriComponentsContributorFactoryBean