注释类型 EnableWebMvc

@Retention(RUNTIME)
@Target(TYPE)
@Documented
@Import(DelegatingWebMvcConfiguration.class)
public @interface EnableWebMvc

Adding this annotation to an @Configuration class imports the Spring MVC configuration from WebMvcConfigurationSupport, e.g.:

 @Configuration
 @EnableWebMvc
 @ComponentScan(basePackageClasses = { MyConfiguration.class })
 public class MyWebConfiguration {

 }
 

To customize the imported configuration, implement the interface WebMvcConfigurer or more likely extend the empty method base class WebMvcConfigurerAdapter and override individual methods, e.g.:

 @Configuration
 @EnableWebMvc
 @ComponentScan(basePackageClasses = { MyConfiguration.class })
 public class MyConfiguration extends WebMvcConfigurerAdapter {

           @Override
           public void addFormatters(FormatterRegistry formatterRegistry) {
         formatterRegistry.addConverter(new MyConverter());
           }

           @Override
           public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
         converters.add(new MyHttpMessageConverter());
           }

     // More overridden methods ...
 }
 

If WebMvcConfigurer does not expose some advanced setting that needs to be configured, consider removing the @EnableWebMvc annotation and extending directly from WebMvcConfigurationSupport or DelegatingWebMvcConfiguration, e.g.:

 @Configuration
 @ComponentScan(basePackageClasses = { MyConfiguration.class })
 public class MyConfiguration extends WebMvcConfigurationSupport {

           @Override
           public void addFormatters(FormatterRegistry formatterRegistry) {
         formatterRegistry.addConverter(new MyConverter());
           }

           @Bean
           public RequestMappingHandlerAdapter requestMappingHandlerAdapter() {
         // Create or delegate to "super" to create and
         // customize properties of RequestMappingHandlerAdapter
           }
 }