java在表之间有@ManyToOne链接时，如何创建对象

Question

我有两门课——个人课和团队课。 一个人只能在一个团队中，但一个团队可以有许多人（个人对象）。问题是Person和Team都需要其他类对象来创建它们自己

课程：

@Entity
@Table(name = "Team")
public class Team {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id", nullable = false)
    private int id;

    @Column(name = "teamName", nullable = false)
    private String teamName;

    @OneToMany(mappedBy = "myTeam", fetch = FetchType.LAZY)
    private Set <Person> setOfMembers = new HashSet<Person>();

    public Team(int id, String teamName, Set <Person> setOfMembers) {
            //usual code (don't want to waste so much space)
    }
    ... other irrelevant fields ...
}

@Entity
@Table(name = "Person")
public class Person{
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID", nullable = false)
    private int id;

    @Column(name = "teamID", nullable = false)
    private int teamID;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "teamID", referencedColumnName = "id")
    private Team myTeam;

    public Person(int id, int teamID, Team myTeam) {
        //usual code
    }
    ... other irrelevant fields ...
}

现在在主文件中，我尝试创建一个新对象：

Team t1 = new Team(1,"Nights Watch", <and here i need Person Object, so i 
do something as follows:> new Person(1,1, <and here i need Team object>));

因此，它不断重复，没有尽头。 我想向数据库中添加一些记录，但我不知道如何添加

实际上我需要一组Person对象，但我仍然不知道怎么做

Answer 1

为什么在初始化Team类时需要所有的队友

只需执行不带Person参数的构造函数，然后执行如下方法：

public void addTeamMember(Person person) {
   setOfMembers.add(person);
}

然后，您可以创建Team，创建Person，最后将此人添加到团队中