问题

Long型数据返回前端，大于17位，js会丢失精度

解决方法

Json序列化的时候，将Long型转换为String类型

实现方式

自定义Jackson ObjectMapper,增加转换Module

  /**
* registerLongSerializer
*
* <p>Handle Long Format to String
*
* @author Created by ivan at 下午2:53 2020/1/10.
*/
  public static void registerLongSerializer(ObjectMapper objectMapper) {
 SimpleModule long2StringModule = new SimpleModule();
 // Handle long To String
 long2StringModule.addSerializer(Long.class, ToStringSerializer.instance);
 objectMapper.registerModule(long2StringModule);
  }

增加Converter Function，用于替换MappingJackson2HttpMessageConverter中的ObjectMapper

  public static Consumer<HttpMessageConverter<?>> objectMapperWrapper() {
 return converter -> {
   if (converter instanceof MappingJackson2HttpMessageConverter httpMessageConverter) {
     ObjectMapper objectMapper = httpMessageConverter.getObjectMapper();
     JsonHelper.registerLongSerializer(objectMapper);
     httpMessageConverter.setObjectMapper(objectMapper);
   }
 };
  }

@Configuration
public class SpringMvcConfiguration implements WebMvcConfigurer {

  @Override
  public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
 converters.forEach(CustomMessageConverterWrapper.objectMapperWrapper());
  }
}

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最后编辑时间为: Mar 21, 2023 at 09:26 am

Springboot/MVC序列化Long型为String

问题

解决方法

实现方式