springboot中使用Long类型导致前端获取时精度丢失的问题

首先，实体类中的id类型为Long

前端接收到的id精度丢失

{
  "success": true,
  "code": "200",
  "data": [
    {
      "id": 1199222178982396000, //这里精度丢失了！！
      "idCard": "422202199910210811",
      "personName": "string",
      "age": 0,

    }
  ],
  "errorMessage": null,
  "currentTime": "2019-11-26T07:06:25.301+0000"
}

但是数据库中的id是正常的

原因：js中没有长整型的类型，所以我们返回时应该转化为字符串类型

解决方案（spring boot版）

我这里使用的fastjson进行序列化

使用maven引入fastjson的依赖

 <!--fastjson-->
 <dependency>
     <groupId>com.alibaba</groupId>
     <artifactId>fastjson</artifactId>
     <version>1.2.62</version>
 </dependency>

FastJson的配置类

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;

/**
 * @Classname JsonConfig
 * @Date 2019/11/26 15:16
 * @Created by ChuWanJiang
 */
@Configuration
public class JsonConfig {
    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
        // 1.定义一个converters转换消息的对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        // 2.添加fastjson的配置信息，比如: 是否需要格式化返回的json数据
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        // 3.在converter中添加配置信息
        fastConverter.setFastJsonConfig(fastJsonConfig);
        // 4.将converter赋值给HttpMessageConverter
        HttpMessageConverter<?> converter = fastConverter;
        // 5.返回HttpMessageConverters对象
        return new HttpMessageConverters(converter);
    }
}

最后在实体类中加上注解

    @ApiModelProperty(value = "id")
    @JSONField(serializeUsing = ToStringSerializer.class)
    @TableId(value = "id", type = IdType.ID_WORKER)
    private Long id;

其中，引入的类为

import com.alibaba.fastjson.annotation.JSONField;
import com.alibaba.fastjson.serializer.ToStringSerializer;

大功告成

{
  "code": "200",
  "currentTime": 1574752655889,
  "data": [
    {
      "age": 0,
      "id": "1199225233215705089",
      "idCard": "422202199910210811",
      "personName": "string"
    }
  ],
  "success": true
}