java - Spring addFormatters 未调用 WebMvcConfigurerAdapter

Question

我正在尝试在 Spring Boot 应用程序中实现转换器，但由于某种原因，我对 addFormatters(FormatterRegistry formatterRegistry) 的重写从未被调用。令人困惑的是，调用了其他重写的方法，addInterceptors 工作得很好。此应用程序已启用安全性。

@EnableWebMvc
@Configuration
@ComponentScan(basePackages = {"com.company.web"})
public class WebMvcConfig extends WebMvcConfigurerAdapter {

  private final Logger logger = LoggerFactory.getLogger(this.getClass());

  @Autowired
  private RequestMappingHandlerAdapter requestMappingHandlerAdapter;

  @Inject
  private TenantIdentifierInterceptorAdapter multiTenancyInterceptor;

  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    logger.info("adding interceptor");
    registry.addInterceptor(multiTenancyInterceptor);
  }

  //THIS IS NOT CALLED
  @Override
  public void addFormatters(FormatterRegistry formatterRegistry) {
    logger.info("adding converters"); 
    formatterRegistry.addConverter(new StringToPersonConverter());
  }

  private static final String[] CLASSPATH_RESOURCE_LOCATIONS = {"classpath:/META-INF/resources/",
      "classpath:/resources/", "classpath:/static/", "classpath:/public/"};

  @Override
  public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/**").addResourceLocations(CLASSPATH_RESOURCE_LOCATIONS)
        .setCachePeriod(3600).resourceChain(true).addResolver(new PathResourceResolver());
  }

  @PostConstruct
  public void init() {
    requestMappingHandlerAdapter.setIgnoreDefaultModelOnRedirect(true);
  }

}

出于某种原因，如果我将此代码添加到文件中，则会触发格式化程序代码，但我收到错误“需要 ServletContext 来配置默认 servlet 处理”，并且应用程序将无法编译。

@Bean
public ResourceBundleMessageSource messageSource() {
ResourceBundleMessageSource messageSource = new       ResourceBundleMessageSource();
messageSource.setBasename("messages");
return messageSource;
}

Answer 1

您是否使用父类(super class) WebMvcConfigurationSupport 配置了 bean？
如果您这样做，它将禁用 WebMvcAutoConfiguration Bootstrap。
检查此代码:

@Configuration
@ConditionalOnWebApplication(
    type = Type.SERVLET
)
@ConditionalOnClass({Servlet.class, DispatcherServlet.class, WebMvcConfigurer.class})
@ConditionalOnMissingBean({WebMvcConfigurationSupport.class})
@AutoConfigureOrder(-2147483638)
@AutoConfigureAfter({DispatcherServletAutoConfiguration.class, ValidationAutoConfiguration.class})
public class WebMvcAutoConfiguration {