小编Kev*_*vin的帖子

在我的应用程序中，两个实体之间具有以下映射：

@Entity
public class Applicant {
     private Integer id;
     ....
     private Set<Document> documents;

     ... Getters and Setters ...

     @OneToMany(fetch = FetchType.LAZY, mappedBy = "applicant", cascade = CascadeType.ALL)
     public Set<Document> getDocuments() {
     return documents;
     }

    public Applicant setDocuments(Set<Document> documents) {
        this.documents = documents;
        return this;
    }
}

和文件：

public class Document {

    private Long id;
    private Applicant applicant;

    ... Getters and Setters ...

    @ManyToOne
    public Applicant getApplicant() {
        return applicant;
    }

    public Document setApplicant(Applicant applicant) {
        this.applicant = applicant;
        return this; …