Java 如何在SpringBoot中使用单个@postmapping填充多个表

我开发了一个应用程序，允许管理候选人，该应用程序包含两个表（候选人和技术）与@ManyToMany连接表连接，我正在寻找如何用相同的@PostMapping填充这两个表，正如我的代码所示。我使用的是一个角度应用程序，它向候选人发送所有信息和技术表（候选人必须选择，他不能添加新技术）。我想加入新候选人的行列，加入一些技术方面的内容。这是控制器将接收到的内容：

{prenom: "Pname", nom: "Name", pseudo: "Pnamename", ecole: "school", mail: "email@email.com", …}
ecole: "school"
mail: "email@email.com"
nom: "Name"
numTel: "0123456789"
prenom: "Pname"
pseudo: "Pnamename"
roleCible: "poste"
secteurActivites: "sector"
techno: Array(3)
0: "android"
1: "drupal"
2: "html"
length: 3
__proto__: Array(0)
typeContrat: "CDI"
villeRecherchee: "Paris"
__proto__: Object

1-candidate.java

@Entity
@Table(name = "Candidats")
public class Candidat {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;

    private String nom;
    private String prenom;
    private String ecole;
    private String numTel;
    private String mail;
    private String pseudo;
    private String roleCible;
    private String typeContrat;
    private String villeRecherchee;

    @Temporal(TemporalType.DATE)
    private Date dateCurrent = new Date();

    @ManyToMany(fetch = FetchType.LAZY, cascade = { CascadeType.PERSIST, CascadeType.MERGE })
    @JoinTable(name = "candidat_techno", joinColumns = { @JoinColumn(name = "candidat_id") }, 
      inverseJoinColumns = {
            @JoinColumn(name = "techno_id") })

    private Set<Techno> techno = new HashSet<>();

    public Candidat() {

    }
    @SuppressWarnings("unchecked")
    public Candidat(String nom, String prenom, String ecole, String numTel, String mail, String pseudo,
            String roleCible, String typeContrat, String villeRecherchee, List<Techno> techno, Date dateCurrent,) {
        super();
        this.nom = nom;
        this.prenom = prenom;
        this.ecole = ecole;
        this.numTel = numTel;
        this.mail = mail;
        this.pseudo = pseudo;
        this.roleCible = roleCible;
        this.typeContrat = typeContrat;
        this.villeRecherchee = villeRecherchee;
        this.techno = (Set<Techno>) techno;
        this.dateCurrent = new Date();  

     //getters ans setters

}

3-候选人条例

@Repository
public interface CandidatDao extends JpaRepository<Candidat, String> {
}

6-TechnoDao

 @Repository
    public interface TechnoDao extends JpaRepository<Techno, String> {
    Techno save(Set<Techno> techno);
    }

---

在CandidateController中，添加以下内容：

@Autowired
TechnoDao technoDao;

在post映射内部使用以下选项：

technoDao.save(candidat.getTechno());

---

这对您很有帮助。

您可以在CandidateController中DI TechnoDAO并调用方法在那里保存techno。感谢您的回答，但我也有同样的问题，当我使用Postman使用techno保存候选人时，我有以下问题：“JSON解析错误：java.util.ArrayList无法转换为java.util.Set；嵌套异常为com.fasterxml.jackson.databind.JsonMappingException:java.util.ArrayList不能在[Source:（PushbackInputStream）；第26行，第3列]（通过引用链：com.avatar.model.candidate[\“techno\”]）”处转换为java.util.Set\n，

 @Repository
    public interface TechnoDao extends JpaRepository<Techno, String> {
    Techno save(Set<Techno> techno);
    }

    {
    id: 1,
    nom: "smith",
    prenom: "john",
    ecole: "usa",
    numTel: "11111",
    mail: "j@smith",
    pseudo: "JS",
    roleCible: "usa",
    typeContrat: "usa",
    villeRecherchee: "paris",       
    dateCurrent: "2019-10-02",
    techno: [
        {
          id: 1,
          nomTechno: "springBoot"
        },
        {
         id: 2,
         nomTechno: "java"
         }
           ]
  }

@Autowired
TechnoDao technoDao;

technoDao.save(candidat.getTechno());