思路：针对出参进行序列化处理

package com.sikaryofficial.common.security.config;

import com.fasterxml.jackson.databind.MapperFeature;
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;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;


@Configuration
public class JacksonConfig {

    @SuppressWarnings("deprecation")
    @Bean
    public MappingJackson2HttpMessageConverter jackson2HttpMessageConverter() {
        final Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
        /**
         * 序列化时，将 null 值不输出
         * builder.serializationInclusion(JsonInclude.Include.NON_NULL);
         */
        final ObjectMapper objectMapper = builder.build();
        SimpleModule simpleModule = new SimpleModule();
        // Long 转为 String 防止 js 丢失精度
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        objectMapper.registerModule(simpleModule);
        // 忽略 transient 关键词属性
        objectMapper.configure(MapperFeature.PROPAGATE_TRANSIENT_MARKER, true);
        return new MappingJackson2HttpMessageConverter(objectMapper);
    }

}

还可以参考如下：

spring boot解决给前端传值，Long型导致JS值溢出的问题，统一转字符串_后端传了个long js泄露了-CSDN博客