springboot java

其他都是好的，唯独trackGrip的值一直为null,数据库里的数据都是正常的，

package com.example.track.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Tra {
    private  Integer trackId;
    private  Integer track;
    private  String raceType;
    private  String car;
    private  String trackGrip;
    private  Integer ambientTemperature;
    private  Integer trackTemperature;
    private  String description;
    private  Integer fastestLapTime;

}

@Select("select * from work.track_management limit #{start},10")
    public List <Tra> page(Integer start);
    //查询全部数据
    @Select("select * from work.track_management")
    List<Tra> list();

trackGrip是个什么类型的值？mapper里面映射关系是怎样的？是输出到Tra吗？Tra长啥样？

看看trackGrip有没有写错