springboot接口问题

Question

package com.example.VEEProject.bean;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import lombok.Getter;
import lombok.Setter;


@Entity
@Table(name = "veedata")
public class VeeData {
    @Id
    @GeneratedValue
    private int id;
    @Column(name = "PESTLE category")
    @Getter
    @Setter
    private String PestleCategory;
    @Column(name = "Issue title")
    @Getter
    @Setter
    private String IssueTitle;
    @Column(name = "Issue description")
    @Getter
    @Setter
    private String IssueDescription;
    @Column(name = "Issue type")
    @Getter
    @Setter
    private String IssueType;
    @Column(name = "Implications")
    @Getter
    @Setter
    private String Implications;
    @Column(name = "Impact zone")
    @Getter
    @Setter
    private String ImpactZone;
    @Column(name = "Risk area")
    @Getter
    @Setter
    private String RiskArea;
    @Column(name = "Time horizon")
    @Getter
    @Setter
    private String TimeHorizon;
    @Column(name = "Response")
    @Getter
    @Setter
    private String Response;
    @Column(name = "Related entries")
    @Getter
    @Setter
    private String RelatedEntries;
    @Column(name = "Related themes")
    @Getter
    @Setter
    private String RelatedThemes;
    @Column(name = "Further reading name")
    @Getter
    @Setter
    private String FurtherReadingName;
    @Column(name = "Further reading link")
    @Getter
    @Setter
    private String FurtherReadingLink;

}

请问 springboot 后端中如何写一个根据id和变量名查询变量的值的接口，又如何用postmanAPI做测试？变量名在上方的代码里。

package com.example.VEEProject.dao;

import org.springframework.data.jpa.repository.JpaRepository;

import com.example.VEEProject.bean.VeeData;

public interface VeeDataDao extends JpaRepository<VeeData, Integer> {

}

Answer 1

报错是因为返回的类型问题，接口返回类型是String，但是return的类型是VeeData