Spring Boot笔记-Hibernate中@ManyToOne及@OneToOne

ER图如下：

这里只截取了部分，可见normalGoods表和user表中有关系。normalGoods和topGoods表有关系，

其中对应的表内容如下：

normalGOods

topGoods

user

其中对应的代码如下：

TopGoods.java

package com.it1995.demo.object;

import lombok.Data;

import javax.persistence.*;

@Data
@Entity
@Table(name = "topGoods")
public class TopGoods {

    @Id
    @Column(name = "id")
    private Integer id;

//    @Column(name = "goodsID")
//    private Integer goodsID;

    @OneToOne
    @JoinColumn(name = "goodsID")
    private NormalGoods good;

    @Column(name = "sequence")
    private Integer sequence;
}

NormalGoods.java

package com.it1995.demo.object;

import lombok.Data;

import javax.persistence.*;
import java.util.Date;

@Data
@Entity
@Table(name = "normalGoods")
public class NormalGoods {

    @Id
    @Column(name = "id")
    private Integer id;

    @ManyToOne
    @JoinColumn(name = "userID")
    private User userObject;

    @Column(name = "name")
    private String name;

    @Column(name = "description")
    private String description;

    @Column(name = "picPath")
    private String picPath;

    @Column(name = "modiTime")
    private Date modifyTime;
}

这里使用@ManyToOne或者@OneToOne，然后@JoinColumn把外键填写上去。

如果是@OneToMany

@OneToMany
private List<XXXXX> XXXXXX;

程序运行截图如下：

下面一个就不截取了！