```java public class Country { //country 对应 Province.country 属性名 @OneToMany(mappedBy = "country", fetch = FetchType.EAGER) private List<Province> provinceList; } ``` ```java public class Province { //Country -> Province 是一对多，反过来 Province -> Country 就是多对一 @ManyToOne(targetEntity = Country.class) //country_id 对应 Country.id 属性名 //将会在 Province 表中建立 country_id 的物理外键 @JoinColumn(name = "country_id", referencedColumnName = "id") private Country country; } ``` >[warning] 如果你使用 lombok 请查看章节【注意事项】，了解一些细节。