springboot中关于继承WebMvcConfigurationSupport后自定义的全局Jackson失效解决方法，localdate返回数组问题

一般情况下我们在config里增加jackson的全局配置文件就能满足基本的序列化需求，比如前后端传参的问题。

@Configuration
public class JacksonConfig {public static final String LOCAL_TIME_PATTERN = "HH:mm:ss";public static final String LOCAL_DATE_PATTERN = "yyyy-MM-dd";public static final String LOCAL_DATE_TIME_PATTERN = "yyyy-MM-dd HH:mm:ss";@Beanpublic ObjectMapper objectMapper() {ObjectMapper objectMapper = new ObjectMapper();JavaTimeModule javaTimeModule = new JavaTimeModule();javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(ofPattern(LOCAL_TIME_PATTERN)));javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(ofPattern(LOCAL_TIME_PATTERN)));javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(ofPattern(LOCAL_DATE_PATTERN)));javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(ofPattern(LOCAL_DATE_PATTERN)));javaTimeModule.addSerializer(LocalDateTime.class,new LocalDateTimeSerializer(ofPattern(LOCAL_DATE_TIME_PATTERN)));javaTimeModule.addDeserializer(LocalDateTime.class,new LocalDateTimeDeserializer(ofPattern(LOCAL_DATE_TIME_PATTERN)));objectMapper.registerModule(javaTimeModule);objectMapper.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));objectMapper.configure(JsonGenerator.Feature.IGNORE_UNKNOWN, true);objectMapper.configure(DeserializationFeature.FAIL_ON_IGNORED_PROPERTIES, false);objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);objectMapper.configOverride(Boolean.class).setFormat(JsonFormat.Value.forShape(JsonFormat.Shape.NUMBER));return objectMapper;}}

但是最近做的项目中发现，请求拦截的时候继承WebMvcConfigurationSupport排除某些例如swagger等目录的情况，上面的配置会失效，所以我们要稍微改动下。看WebMvcConfigurationSupport源码就能发现里面有自己的Jackson处理方法。我们只需要将配置也添加进去就行。

@Configuration
public class InterceptorConfig extends WebMvcConfigurationSupport {@Beanpublic HandlerInterceptor getTokenInterceptor() {return new TokenInterceptor();}@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(getTokenInterceptor()).addPathPatterns("/**").addPathPatterns("/**")//排查swagger的相关的拦截.excludePathPatterns("/swagger-resources/**", "/webjars/**", "/v2/**", "/swagger-ui.html/**");super.addInterceptors(registry);}/*** 排查swagger的相关的拦截** @param registry*/@Overrideprotected void addResourceHandlers(ResourceHandlerRegistry registry) {registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");}@Overrideprotected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {converters.add(new MappingJackson2HttpMessageConverter(objectMapper()));}public static final String LOCAL_TIME_PATTERN = "HH:mm:ss";public static final String LOCAL_DATE_PATTERN = "yyyy-MM-dd";public static final String LOCAL_DATE_TIME_PATTERN = "yyyy-MM-dd HH:mm:ss";public ObjectMapper objectMapper() {ObjectMapper objectMapper = new ObjectMapper();JavaTimeModule javaTimeModule = new JavaTimeModule();javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(ofPattern(LOCAL_TIME_PATTERN)));javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(ofPattern(LOCAL_TIME_PATTERN)));javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(ofPattern(LOCAL_DATE_PATTERN)));javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(ofPattern(LOCAL_DATE_PATTERN)));javaTimeModule.addSerializer(LocalDateTime.class,new LocalDateTimeSerializer(ofPattern(LOCAL_DATE_TIME_PATTERN)));javaTimeModule.addDeserializer(LocalDateTime.class,new LocalDateTimeDeserializer(ofPattern(LOCAL_DATE_TIME_PATTERN)));objectMapper.registerModule(javaTimeModule);objectMapper.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));objectMapper.configure(JsonGenerator.Feature.IGNORE_UNKNOWN, true);objectMapper.configure(DeserializationFeature.FAIL_ON_IGNORED_PROPERTIES, false);objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);objectMapper.configOverride(Boolean.class).setFormat(JsonFormat.Value.forShape(JsonFormat.Shape.NUMBER));return objectMapper;}
}

也就是把以前直接@Bean注入的形式改成了直接在子类Override然后add进去就行。LocalDateTime返回变成数组也是这个原因。