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。

@Configurationpublic 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";    @Bean    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;    }}

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。

@Configurationpublic class InterceptorConfig extends WebMvcConfigurationSupport {    @Bean    public HandlerInterceptor getTokenInterceptor() {        return new TokenInterceptor();    }    @Override    public void addInterceptors(InterceptorRegistry registry) {        registry.addInterceptor(getTokenInterceptor()).addPathPatterns("    @Override    protected void addResourceHandlers(ResourceHandlerRegistry registry) {        registry.addResourceHandler("swagger-ui.html")            .addResourceLocations("classpath:/META-INF/resources/");        registry.addResourceHandler("/webjars/**")            .addResourceLocations("classpath:/META-INF/resources/webjars/");    }    @Override    protected 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。

来源地址：https://blog.csdn.net/weixin_43910915/article/details/132494012