Spring Boot接口返回Long类型的数据时丢失精度的全局处理

1、问题

当实体类中的字段为Long类型时，通过Ajax请求返回给前段，在js中数据会丢失精度

直接通过postman请求或通过浏览器请求，看下响应则不会丢失精度

2、处理方式

1、使用@JsonSerialize注解

@JsonSerialize(using = ToStringSerializer.class)
private Long id;

2、使用@JsonFormat注解

@JsonFormat(shape = JsonFormat.Shape.STRING)
private Long id;

3、全局配置ObjectMapper Bean

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

@Slf4j
@Configuration
public class JacksonConfig {
    /**
     * Jackson对象映射器
     * @param builder builder
     * @return ObjectMapper
     */
    @Bean
    @Primary
    @ConditionalOnMissingBean(ObjectMapper.class)
    public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
        try {
            // 将Long类型返回时修改为String类型
            builder.serializerByType(Long.TYPE, ToStringSerializer.instance);
            builder.serializerByType(Long.class, ToStringSerializer.instance);
        } catch (Exception e) {
            log.info("Serialization exception!");
        }
        return builder.build();
    }
}