关于java:Spring-Boot返回前端Long型丢失精度-后两位-变成00

亲测管用 在恒标云考试零碎有源代码。

@Configuration
public class WebMvcConfiguration implements WebMvcConfigurer {
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
    ObjectMapper objectMapper = new ObjectMapper();
    objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    /**
     * 序列换成 json 时, 将所有的 long 变成 string
     * 因为 js 中得数字类型不能蕴含所有的 java long 值
     */
    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);
    }
}