java - 如何使用Hibernate连接列？

Question

我有两个类以及它们之间的关系。无法理解问题出在哪里。我用下面的方式编写代码。

 public class Abiturient {

        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        @Column(name = "id", nullable = false, unique = true, length = 11)
        private Long id;

        @ManyToOne(fetch = FetchType.LAZY)
        @JoinColumn(name = "prizv_id")
        private Prisvishche abiturients_pr;

并映射一个:

public class Prisvishche {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column
    private BigInteger prizv_id;

    @OneToMany(mappedBy = "prizv_id")
    private List<Abiturient> abiturients = new ArrayList();

Answer 1

您不能指向mappedBy 中的数据库列。您必须指向关系的拥有方的实体字段，即:

 @ManyToOne(fetch = FetchType.LAZY)
 @JoinColumn(name = "prizv_id")
 private Prisvishche abiturients_pr;

所以你拥有的一方应该是:

@OneToMany(mappedBy = "abiturients_pr")
private List<Abiturient> abiturients = new ArrayList();