@Retention(RUNTIME) @Target({TYPE,METHOD}) public @interface EnableWebMvc

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

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

To customize the imported configuration, implement the interface WebMvcConfigurer and override individual methods, e.g.:

 @Configuration
 @EnableWebMvc
 @ComponentScan(basePackageClasses = MyConfiguration.class)
 public class MyConfiguration implements WebMvcConfiguration {

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

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

 }

Note: only one @Configuration class may have the @EnableWebMvc annotation to import the Infra Web MVC configuration. There can however be multiple @Configuration classes implementing WebMvcConfigurer in order to customize the provided configuration.

If WebMvcConfigurer does not expose some more 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
     }
 }

作者:

Dave Syer, Rossen Stoyanchev, TODAY 2021/8/14 12:33

另请参阅:

Annotation Interface EnableWebMvc