springboot消息转换器

@Configuration
public class WebConfigurer implements WebMvcConfigurer {

    /**
     * 定义JSON格式转换器
     */
    @Bean
    public MappingJackson2HttpMessageConverter jackson2HttpMessageConverter() {
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        converter.setObjectMapper(mapper);

        // 将long类型的数据转为String类型
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
        simpleModule.addSerializer(long.class, ToStringSerializer.instance);
        mapper.registerModule(simpleModule);

        return converter;
    }

    /**
     * 添加转换器
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        // 将我们定义的时间格式转换器添加到转换器列表中,
        // 这样jackson格式化时候但凡遇到Date类型就会转换成我们定义的格式
        converters.add(jackson2HttpMessageConverter());
    }
}

MappingJackson2HttpMessageConverter 处理请求类型为application/json类型数据。