1、全局注解

package com.jiawa.train.common.config;import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;/*** 统一注解，解决前后端交互Long类型精度丢失的问题
@Configuration
public class JacksonConfig {@Beanpublic ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {ObjectMapper objectMapper = builder.createXmlMapper(false).build();SimpleModule simpleModule = new SimpleModule();simpleModule.addSerializer(Long.class, ToStringSerializer.instance);objectMapper.registerModule(simpleModule);return objectMapper;}
}

2、单独配置

使用注解就可以解决问题。

 /*** id*/@JsonSerialize(using= ToStringSerializer.class)private Long id;/*** 会员id*/@JsonSerialize(using= ToStringSerializer.class)private Long memberId;