这是后端返回的：1807308955001573377

这是前端接收的：1807308955001573400

返回的long类型超过前端的最大长度了，渲染不了

只需要在WebMvcConfiguration配置类中重写方法，如下

@Overrideprotected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();ObjectMapper objectMapper = new ObjectMapper();SimpleModule simpleModule = new SimpleModule();simpleModule.addSerializer(Long.class, ToStringSerializer.instance);simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);objectMapper.registerModule(simpleModule);jackson2HttpMessageConverter.setObjectMapper(objectMapper);converters.add(0, jackson2HttpMessageConverter);}